4. Chúng ta biết những gì?
Tỷ lệ biến chứng gây mê trong sản khoa không được
biết rõ
Bài báo cho chúng ta biết những thông tin gì
mới?
Các biến chứng gây mê sản khoa được lấy từ 257,000
sản phụ được vô cảm bằng gây tê hoặc gây mê tại 30
trung tâm từ năm 2004 đến 2009
Có 85 biến chứng liên quan đến gây mê (1 trên 3,000)
BN
Các BC thường gập là phong bế cao, ngừng thở, đặt
caheter vào tủy sống
D’ Angelo R. Anesthesiology 2014;120:1505-12
5. Hồi sức sản khoa
Grace Anne B. Herbosa
Professor in Anesthesiology
University of the Philippines College of Medicine
Philippine General Hospital
Manila
11. IV. Các bảng kiểm, tập huấn,
Nâng cao chất lượng
12. 1966^: 1st published AHA guidelines
1974: 2nd AHA guidelines
1980 & 1986*: Adult, Pediatrics, Neonatal Care
^Safar P, Brown T, Holtey W, Wilder R. Ventilation and circulation with closed chest
cardiac massage in man. JAMA 1961;176:574-6
*Katz Obstet Gynecol
13. 1992:
Lần đầu được đề cập
4 đoạn; 8 tài liệu tham khảo
Caval decompression; delivery within 5
minutes
14. 2000: 3 trang (2 bảng, thông số, 9 tài liệu tk )
“Điều quan trọng là bạn sẽ mất cả mẹ lẫn
con nếu không phục hồi được tuần hoàn.”
“Fetal-centric”: deliver “within 4-5 mins if BLS/
ACLS fail and…some chance…fetus is viable.”
15. 2005: >3 trang (bảng, 31 tài liệu tk)
Cân nhắc mổ lấy thai cấp cứu càng sớm càng
tốt nếu có biểu hiện của ngừng TH
<20 tuần, 20-23, >24 đến 25
“Các chuẩn bị khác liên quan đến phụ khoa và
nhi khoa”
18. “Cứu cả mẹ và con?
Standard team vs “Code OB”
Lối đi ưu tiên?
Lipman et al.Am J Ostet Gynecol 2010;203(2):179.e1-5
Lipman et al. Ostet Gynecol 2011;118(5):1090-4
19. AHA 2010 Guidelines. Circulation2010;122:S829-S861
Cheskes et al. Circulation 2011;124(1):58-66
20. sâu- 5cm
100/phút (có NKQ)
dừng để sốc điện<5 giây
không kiểm tra mạch sau khi chống rung
(không có NKQ) 30 ép : 2 hô hấp nt
đặt tay ở khoang LS 3 trên xương ức cao hơn so với
người không mang thai 2-3 cm
21. Eckstein et al. Prehosp Disaster Med 2011;26(3):148-50
Einav et al. Acad Emerg Med. 2011;18(5):468-75
Pokorna et al. J Emerg med. 2010;38(5):614-21
22. >20 weeks gestational size or uterus is palpable or visible
Left uterine Displacement
- 2 Handed Technique
Vanden Hoek. Circulation 2010;122:S861
Left Uterine Displacement
One handed Technique
24. Ảnh hưởng của tuổi thai và tư thế sản phụ lên cung lượng tim
side
supine
7
Cung lượng tim
L/Phút
sitting
20-24 28-32 38-40
Tuổi thai-tuần
Ueland K et al AJOG 1969 july 15: 104(6): 856-64
6
5
25. McLennan CE. Antecubital and femoral venous pressure in normal and toxemic
pregnancy. American Journal of Obstetrics and Gynecology. 1943;45(4):568–591.
26. McLennan CE. Antecubital and femoral venous pressure in normal and toxemic
pregnancy. American Journal of Obstetrics and Gynecology. 1943;45(4):568–591.
27.
28. Đảm bảo cung cấp oxy và thông khí
Người đầu tiên không có nhiều KN về KS đường
thở
Nâng hàm, thông khí qua mũi bằng mask và ambu
Luôn chú ý đến trào ngược = sửa lỗi
Ấn sụn giáp nhẫn ảnh hưởng không rõ ràng đến việc
thông khí và dùng đèn soi thanh quản
AHA 2010 không khuyến cáo cho BN không mang thai
AHA 2010 Guidelines: Circulation 2010; 122:S829-S861
Fenton et al Int J Obstet Anesth 2009;18(2);106-10
Smith et al. Anesthesiology 2003;99(1);60-4
Boet et al. J Emerg Med. 2010;42(5):606-11
29. Nên làm đ ng truy n TM ườ ề hoặc tủy xương phía trên cơ
hoành để tránh nguy cơ Tm chủ dưới bị thai chèn ép
Tăng thời gian thuốc và dịch đến tim.
30. Các thu c h ố ồi sức cơ bản: không có CCĐ và
thay đổi liều
Dung dịch lipid nếu ngộ độc thuốc tê, cân
nhắc CĐ ECMO hoặc tim phổi nhân tạo nếu
có tắc mạch
Cân nhắc dung oxytocin khi có CĐ
AHA 2010 Guidelines:Circulation 2010;122:S829-S861
Bern, Weinberg. Curr Op in Anaesth2011:24(3)262-67
Dyer et al. Curr Opin Anaesthesiol 2011:24(3):255-61
31. Có thể đẻ đường dưới?
Chèn ép TM chủ dưới +4 phút từ khi ngừng?
Không đáp ứng với ACLS- kiểm tra mạch lần
cuối?
32. Katz (38 ca): 12 of 20 có ROSC
Einav (76 trên 91 ca có CS): 32% có ích
Đ trong vòng 5 ẻ phút: chỉ có 4 trên 76 (7%)
Tình trạng của người mẹ không bị xấu đi khi
mổ đẻ
Katz et al. Am j Obstet Gynecol 2005; 192(6): 1916-20
Einav et al. Resuscitation 2012; 83(10): 1191-200
33. Thông số Phòng đẻ
(n=7)
Phòng mổ
( n=7)
P value
CPR
resumed
3: 01
(2:53 – 3:17)
4:20
(3:20- 6:53)
0.030*
Intubation 4: 05
(3:22-4:18)
4:48
(4:19- 5:54)
0.064*
Tỷ lệ 4:25
(3:59 - 4:50)
7:53
(7:18- 8:57)
0.004*
Giá trị trung bình thời gian (IQR) phút: giây
Lipman, Daniels, Cohen, Carvalho. Obstet Gynecol 2011;118:1090-4
34.
35.
36. Bảng kiểm Point of Care
Adapted from OBSim and OBLS, Center for Advanced Pediatric and Perinatal Education, Stanford University
Gọi hỗ trợ!
ÉP TIM NGOÀI LỒNG NGỰC
C TUẦN HOÀN
A ĐƯỜNG THỞ
B HÔ HẤP
D CHỐNG RUNG
E LẤY THAI
Call “OB Code”
Call neonatal team
Adult Code Cart
Adult airway equipment
Scalpel/cesarean pack
Assign timer/documenter
Immediate BLS
Backboard
Left uterine displacement
Hands mid-sternum
100 compressions/min
PUSH HARD! PUSH FAST!
Change compressors every 2 min
Obtain IV access above diaphragm
100% oxygen
Chin Lift/ Jaw Thrust
Oral airway, mask ventilate or
Intubate early with 6.0 ETT or
Supraglottic airway (LMA with gastric port)
DO NOT INTERRUPT CHEST COMPRESSIONS!
If intubated:10 breaths / min (500-700ml/breath)
If not intubated: 30 compressions to 2 breaths
Use self inflating bag
Administer each breath over 1 second
Pads front and back
AED: Analyze/defibrillate every 2 min
Immediately resume CPR for 2 min
Prepare for delivery
Aim for incision by 4 min
Aim for fetal delivery by 5 min
37. OBLS: NGỪNG TIM Ở SẢN PHỤ
CALL FOR HELP: EMERGENCY CORD/ BUTTON
C
TUẦN HOÀN
Backboard
Manual Left uterine
displacemeny
100 compressions/min
Push HARD, Push FAST
Change compressors q i-2 min
A
ĐƯỜNG THỞ
Ventilate &Oxygenate
Consider:
Chin lift
Oral Airway
Ambu Bag
Suction
Mask ventilate
Intubate or other device
B
HÔ HẤP
If intubated- Breathe q 6 sec
(10/min)
If not intubated- 30
compressions:2 breaths-consider
2 handed mask
ventilation
D
CH NG RUNG, ỐL
ẤY THAI
- Remove fetal monitors
- Apply pads front and back
- Analyze/defibrillate via AED
- Immediately resume CPR X2min
- Prep for PERIMORTEM
DELIVERY
- DELIVERY within 5 min
Recommended by
AHA 2010. Katz V et al
38. Different provider?
Prepare SGA(LMA)
Continue bag mask PPV
Place SGA (LMA etc)
Utilize VA device (glidescope etc)
Continue with bag mask PPV
Kiểm soát đường
Kiểm soát đường
thở
thở
Secure ETT / LMA
10 breaths per min
1 breath every 6 seconds
Delegate PPV to another provider
Secure ETT / LMA
10 breaths per min
1 breath every 6 seconds
Delegate PPV to another provider
39. A Các nguy c liên quan đ n GMHS (phong b cao; ơ ế ế mất KS đường thở; trào
ngược; suy hh; tụt HA; ngộ độc thuốc tê)
B Chảy máu* (DIC hoặc bệnh lý đông máu, đờ tử cung, placenta accreta,
abruption, previa, rách tử cung, trauma, phản ứng truyền máu
C Nguyên nhân tim mạch (bệnh lý cơ tim, NMCT, phồng quai ĐMC, loạn nhịp)
D Thuốc (illicit; nhầm thuốc, quá liều thuốc, sốc phản vệ)
E Tắc mạch (tắc mạch phổi, tắc mạch ối (AFE); khí)
F Sốt* (Nhiễm trùng, sốc NK)
G Các NN không phải sản khoa (Hs và Ts)**
H Cao HA* (Tiền sản giật/sản giật/HELLP, chảy máu trong)
*Often diagnosis is apparent or predicted from pre-arrest condition
40.
41.
42.
43. Tái l p tu n hoàn (no ROSC), ậ ầ dùng ECMO hoặc THNCT
nếu có CĐ
Điều trị NN
Kiểm soát đờ tử cung
?Hạ Thân nhiệt chỉ huy được báo cáo ở vài trường hợp
đang trong nửa đầu thai kỳ không có tác dụng phụ nào
ngoại trừ 1 trường hợp tử vong.
44. 98 TH TV
77% liên quan đến chuyên môn
Chậm trễ hoặc trì hoãn dx/ tx
Xử trí không hiệu quả
Bỏ sót chuẩn đoán
The California Pregnancy Associated Mortality Review. Report from 2002 and 2003 Maternal Death reviews
Sacramento:California Department of Public Health, Maternal Child and Adolescent Health Division;2011
45. Tổ chức, chuẩn bị tốt
Tập huấn thường xuyên
Đánh giá cá nhân(thái độ, nhận thức, kỹ
thuật) và hệ thống; các phương án đối phó
Hui. Obstet Gynecol Can 2011;33:858-63
Cohen. Int J Obstet Anesth 2008;17:20-25
Lipman. Semin Perinatol 2011;35(2):74-9
Dijkman. BJOG 2010;117:282-87
46. Q&A: CAB or ABC?
Thứ tự C-A-B(AHA)
Chú ý: hô hấp ảnh hưởng đến mẹ (vd., quá liều Mg/
opioid, phong bế TK quá cao, tụt HA sau cơn sản giật,
không đặt được NKQ hoặc không thông khí được), RL
NT
Sản phụ SHH/toan máu rất nhanh khi ngừng thở (nhu
cầu tiêu thụ oxy cao, giảm dung tích cặn chức năng,
cung cấp oxy cho con ).
47. Q&A: CAB or ABC?
Thứ tự C-A-B(AHA)
Chú ý: hô hấp ảnh hưởng đến mẹ (vd., quá liều
Mg/ opioid, phong bế TK quá cao, tụt HA sau cơn sản
giật, không đặt được NKQ hoặc không thông khí
được), RL NT
Sản phụ SHH/toan máu rất nhanh khi ngừng thở (nhu
cầu tiêu thụ oxy cao, giảm dung tích cặn chức năng,
cung cấp oxy cho con ).
✓lập tức ép tim NLN liên
tục, hạn chế dừng thông
khí với nồng độ oxy cao đồng
thời chống rung
48. Q&A: Chuy n TC ể sang trái vs Tilt?
Tilt gây ra bất lợi khi ép tim- phân tán lực không tập
trung ở ngực
1 NC trên sản phụ BT được thực hiện CS : di chuyển
TC thủ công giảm nguy cơ tụt HA ở TS so với bàn
nghiêng15°
49. Q&A: Chuy n TC ể sang trái vs Tilt?
Tilt gây ra bất lợi khi ép tim- phân tán lực không tập
trung ở ngực
1 NC trên sản phụ BT được thực hiện CS : di chuyển
TC thủ công giảm nguy cơ tụt HA ở TS so với bàn
nghiêng15°
✓Effective LUD best achieved with manual displacement.
Kundra P, Khanna S, Habeebullah S, Ravishankar M. Anesthesia 2007;62:460–5
50. Q&A: PMCD - Transport to OR?
Các NC giả định với sản phụ bị ngừng TH và
PMCD: vận chuển từ phòng đẻ đến phòng mổ trì
hoãn rạch TC. Thời gian trung bình 4-8 phút (LR vs
OR)
Trong lúc VC gián đoạn và giảm HQ của việc ép tim
NLN.
Lipman S, Daniels K, Cohen SE, Carvalho B. Obstet Gynecol
2011;118:1090–4
51. Q&A: PMCD - Transport to OR?
Các NC giả định với sản phụ bị ngừng TH và PMCD:
vận chuển từ phòng đẻ đến phòng mổ trì hoãn rạch TC.
Thời gian trung bình 4-8 phút (LR vs OR)
Trong lúc vận chuyển sẽ làm gián đoạn và giảm HQ của
việc ép tim NLN.
✓PMCD nên được tiến hành tại giường bất cứ khi
nào có thể với các thai > 20 tuần.
Lipman S, Daniels K, Cohen SE, Carvalho B. Obstet Gynecol 2011;118:1090–4
52. Câu hỏi tình huống Q&A
Một sản phụ được phát hiện ngừng TH 7 phút sau khi tụt HA. Bn được ép
tim ngoài lồng ngực ngay lập tức, vài phút sau đội cấp cứu đến. Khi nào
nên mổ lấy thi?
53. Câu hỏi tình huống- Thời gian mổ lấy
thai?
2010 AHA: (1)”Mổ CC lấy thai nên được chỉ đinh
trong vòng 4 phút sau khi ngừng TH nếu không có
ROSC,” và (2) “nếu ROSC trong 4 phút HS, cân nhắc
mổ cc lấy thai trong vòng 5 phút
✓ Trong các tình huống LS trên, việc ép tim NLN/
BLS/ACLS vẫn được tiến hành cho song song vói các
bước chuẩn bị mổ đẻ không nhất thiết phải chờ đến 4
phút
54. Q&A: T i sao AEDs ạ nên được dung hơn là các máy sốc
điện bằng tay?
AHA 2010: “mặc dù không có chứng cứ, AEDs
nên được trang bị ở BV nhất là ử những vị trí
mà nhân viên y tế không quen dùng máy sốc
điện.”
55. Q&A: Có nên đ ng ể ười nhà BN trong phòng khi
đang cc?
Một vài người ủng hộ phương án đưa
người nhà ra ngoài trong quá trình cc,
medico-legal liability
Người nha có thể bị tổn thương tinh thàn
hoặc stress
Cản trở quá trình CC.
Jabre P, et al. N Engl J Med 2013;368:1008–18
56. Q&A: Có nên đ ng ể ười nhà BN trong phòng khi
đang cc?
✓AHA, Hiệp hội điều dưỡng cấp cứu và quan niệm
xã hội - ủng hộ để người nhà BN trong quá trình CC.
Các thành viên trong gia đình có quền được nhìn
thấy người nhà trong những giờ phút cuối cùng
NC cho thấy người nhà BN nhìn thấy Bn khi đang
CC chịu sang chấn tâm lý và trầm cảm ít hơn những
người không được chứng kiến.
Jabre P, et al. N Engl J Med 2013;368:1008–18
57. Q&A: Vi c b máy ệ ỏ theo dõi thai nhi trong quá trình
sốc điện có quan trọng?
Nguy cơ gây bỏng
2 loại theo dõi nhịp tim thai nhi: ngoài và trong(FSE)
Katz VL, Dotters DJ, Droegemueller W.Obstet Gynecol 1986;68:571–6
Katz V, Balderston K, DeFreest M. Am J Obstet Gynecol 2005;192:1916–20
58. Q&A: Vi c b máy ệ ỏ theo dõi thai nhi trong quá trình
sốc điện có quan trọng?
Nguy cơ gây bỏng
2 loại theo dõi nhịp tim thai nhi: ngoài và trong(FSE)
✓Loại bỏ các điện cực theo dõi tim tha trong
quá trình CC nhưng không được làm chậm
việc chống rung
Katz VL, Dotters DJ, Droegemueller W.Obstet Gynecol 1986;68:571–6
Katz V, Balderston K, DeFreest M. Am J Obstet Gynecol 2005;192:1916–20
59. Q&A: b n s đ ạ ẽ ặt tay vào vị trí nào của xương ức khi
ép tim cho BN có thai ?
gravid uterus displace the contents of the
thorax cephalad shift in pregnant patients
who are near term.
✓To Để tăng HQ, bàn tay nên đặt trên xương ức
cao hơn bình thường 2-3 cm sẽ có tác động tốt
hơn đến tim
60. Q&A: N u BN b nghi ng ng ng tim ế ị ờ ừ do ngộ độc thuốc tê, có
nên dùng dd lipid ? Nếu Bn đó không có thai
Thai nghén làm tăng tính nhạy cảm với LAST, và ngộ
độc TM là do nồng độ thuốc tê trong máu quá cao
Liều lượng và thời gian dung lipid tương tự như BN BT
Bern S, Weinberg G. Curr Opin Anaesthesiol 2011;24:262–7
Neal JM, Mulroy MF, Weinberg GL; ASRA checklist for managing local anesthetic systemic toxicity: 2012
version. Reg Anesth Pain Med 2012;37:16–8
61. Q&A: T i sao nên khuy ạ ến khích dùng bảng kiểm để tăng HQ của
việc cấp cứu ?
Bảng kiểm – phần không thể tách rời của
nguyên tắc an toàn và có thể áp dụng cho nhiều
chuyên nghành khác nhau.
Ex. CN hàng không
bảng kiểm trước khi phẫu thuật
NC các tình huống giả định cho thấy bảng kiểm
giúp cải thiện chất lượng làm việc trong quá
trình cc, tập huấn cho tuyến cơ sở nên được
tiến hành Marshall S. The use of cognitive aids during
emergencies in anesthesia: a review of the literature. Anesth Analg
2013;117:1162–71
----- Meeting Notes (6/26/14 21:26) -----
maternal cardiac arrests challenges health care teams with the simultaneous care of both mother and unborn baby. Moreover, ACLS courses stress the fund of knowledge and technical skills and give less importance to behavioral and non technical skills.
Bec maternal arrests are scarece(1:20,000), ther is knowledge decay and knowledge gaps
Finally ACLS courses fail to address facility factors and inst system issues, yet facility factors contribute to 75% of fatal outcomes in a report analyzing preventable deaths
----- Meeting Notes (6/26/14 21:26) -----
maternal cardiac arrests challenges health care teams with the simultaneous care of both mother and unborn baby. Moreover, ACLS courses stress the fund of knowledge and technical skills and give less importance to behavioral and non technical skills.
Bec maternal arrests are scarece(1:20,000), ther is knowledge decay and knowledge gaps
Finally ACLS courses fail to address facility factors and inst system issues, yet facility factors contribute to 75% of fatal outcomes in a report analyzing preventable deaths
Accdg to the Confidential Enquiries to Maternal Death (UK) and the SOAP USA,CV conditions is now the leading cause of mortality among pregnant pts in those countries , about 25.8% and
1/3 of pregnant patients who die-die undelivered
In 1986, Katz published his article on perimortem cs
Although listed numerically, interventions should be performed in parallel as resources permit and certain interventions shld
occur as soon as possible (defib)
High quality chest compressions should be started imme- diately to optimize maternal and fetal outcomes, a defibril- lator or automated external defibrillator (AED) brought to the scene, the airway opened and ventilation commenced.1 A “Code OB” (i.e., a clearly identified obstetric-oriented code team response) should be activated immediately, and the Neonatal Team contacted simultaneously. In a study of simu- lated maternal cardiac arrests, more than 80% of teams were delayed in calling for the Neonatal Team.
Compressions should be hard (achieving approximately 5-cm depth), fast (100 compressions/min), and uninterrupted. Minimizing interruptions in chest compressions is a key concept taught by the AHA with important consequences for patients who present with shockable rhythms. The “perishock pause” (to check for a shockable rhythm immediately preshock) should be limited to &lt;5 seconds because even brief pauses (&gt;5 seconds) decrease the chance for ROSC. To further minimize interruptions in chest compressions, compressions should be resumed immediately after defibrillation. The AHA no longer endorses a pulse check immediately after defibrillation. If the patient’s trachea is intubated, chest compressions should be performed continuously. If the patient’s trachea is not intubated, 30 chest compressions should be followed by 2 breaths in continuous cycles with the goal of providing 100 compressions per minute. Chest compressors should be rotated every two minutes because compressions are physically rigorous and provider fatigue develops rapidly
Current AHA-ACLS guidelines recommend capnography as a modality with which to confirm correct endotracheal tube placement and to assess the efficacy of chest compressions. Capnography reflects the quality of chest compressions because it indirectly measures cardiac output in an intubated patient under stable ventilation conditions. During resuscitation, end-tidal CO2 levels above 10 mm Hg and/or rising end-tidal CO2 levels suggest adequacy of chest compressions and may be predic- tive of ROSC.
LUD is recommended if the uterus is palpable or visible at or above the umbilicus in order to minimize the adverse effects of vena caval compression by the gravid uterus on venous return and cardiac output.
However, caval compression may occur even earlier in pregnancy. The provision of LUD should be based on individual circumstances such as multiple gestation, polyhydramnios, or other conditions in which vena caval obstruction may be a relevant concern, even if the gesta- tional age is &lt;20 weeks. The cardiac output produced from chest compressions is optimized when the arrested parturient is placed on a firm surface (e.g., a backboard) in the supine position with manual LUD. Manual LUD is optimally performed using two hands from the left side of the patient. The designated provider must pull leftward and upward (toward the ceiling); if downward force is inadvertently applied, inferior vena caval compression may worsen. If it is not possible to perform manual LUD from the left, it may be applied from the right side of the patient by push- ing away and toward the ceiling with one or both hands, although this approach may be technically more difficult to perform adequately. Left lateral tilt of the patient to a full 30 degrees (i.e., pelvic tilt) can also be used to provide LUD, but this position may make the provision of adequate chest compressions more challenging as the force transmitted to the chest wall is reduced. In a study of simulated maternal cardiac arrest, initiation of LUD was often neglected
Showing the average course of antecubital and femoral venous pressure throughout normal pregnancy and immediate puerperium based on 171 antecubital and 227 femoral determinations in 160 pregnancies.
Defibrillation should be performed for shockable rhythms as soon as it is available. In sudden cardiac arrest with ventricular fibrillation, the earlier defibrillation occurs the greater the chance of successful defibrillation and ROSC with continuing chest compressions. Defibrillation is safe for the fetus in the setting of maternal cardiac arrest and energy requirements for adult defibrillation are the same in pregnancy and do not need to be altered. The AHA (and others) have analyzed the use of AEDs in comparison to manual defibrillators: “Despite limited evidence, AEDs may be considered for the hospital setting as a way to facilitate early defibrillation (a goal of shock delivery &lt;3 minutes from collapse), especially in areas where staff have no rhythm recognition skills or defibrillators are used infrequently.” In most obstetric settings, use of an AED device (or the AED mode on a defibrillator) is the most practical approach for rapid defibrillation. Ideally, when an AED is used, the device should have a user override function to allow an experienced provider to deliver the shock without waiting for the prescribed
The benefits of using pads rather than paddles include provider safety (the ability to step away from the patient during shock), decreased potential for task saturation (it is unnecessary to hold the pads once they are placed), and the continuous display of electrical cardiac activity. If pads are placed in the anterior and posterior positions, they can be used to both defibrillate and pace. If maternal CPR is ongo- ing and a fetal scalp electrode (FSE) is in place to monitor the fetal heart rate, it is reasonable to disconnect it from the power source before shock. If external fetal monitors are being used, it is reasonable to remove them from the patient before shock and in preparation for cesarean delivery. However, theoretic concerns of electrical burn to the mother and/or fetus should never delay defibrillation. The key point to remember in the setting of maternal cardiac arrest is that fetal monitoring is not necessary to guide management and may distract staff from or delay the provision of maternal CPR and fetal delivery
First-responders without advanced airway experience must use strategies to oxygenate the patient (e.g., jaw thrust, oral airway, bag-mask ventilation). Oral airways are preferred over nasal airways in pregnant patients because of the potential for epistaxis. Repeated airway manipulations should be minimized to avoid airway trauma and interruptions in chest compressions. To avoid interference with chest com- pressions in the nonintubated patient, AHA guidelines emphasize two 500–700 mL tidal volumes (each delivered over one second for two seconds total time) alternating with 30 compressions. Personnel with experience in advanced airway management should perform laryngoscopy. Care must be taken to avoid fixation errors associated with one specific technique of airway management (e.g., “must intu- bate”), and alternative airway control strategies such as supraglottic airway devices (e.g., laryngeal mask airways) should be considered. Although pregnant patients are at risk for aspiration, oxygenation and ventilation must always remain the primary objectives and take priority over aspiration prevention strategies. Evidence suggests that cricoid pressure may not be effective at preventing aspiration, and that it can impede ventilation and laryngoscopy. AHA 2010 guidelines do not recommend cricoid pressure in non- pregnant patients and there is no specific information to support its use in pregnant patients. If cricoid pressure is used, it should be released or adjusted if ventilation is dif- ficult or the view during laryngoscopy is poor.
Intravenous access is essential for rapid intravascular volume repletion and administration of resuscitation drugs. During massive obstetric hemorrhage, critical interventions include multiple sites of large-gauge vascular access, a massive transfusion protocol, a fluid-warming rapid infuser, subhepatic manual compression of the aorta, and the timely notification and involvement of gynecologic oncologists, vascular surgeons, and/or trauma surgeons. Each institution should develop an algorithm to be used in the event of difficult peripheral IV access, including alternatives such as intraosseous access in the proximal humerus, or ultrasound-assisted peripheral or central venous access. Obtaining IV or intraosseous access above the diaphragm is recommended to avoid the potentially deleterious effects of vena caval compression, which could increase the time required for fluids or administered drugs to reach the heart or even prevent their circulation altogether.
Resuscitation drugs should be administered as per current AHA guidelines. None of these drugs (e.g., epinephrine, amiodarone, etc) should be considered contraindicated during maternal cardiac arrest. Although physiologic changes of pregnancy (increases in intravascular volume, decreases in protein binding, and increases in glomerular filtration rate) may alter the volume of distribution and clearance of drugs, these changes are likely to be irrelevant in the low or no-flow state of maternal cardiac arrest.
If local anesthetic-induced cardiac arrest is suspected, lipid emulsion may be administered as an adjunctive therapy as in the nonpregnant patient Because there are no data on which to base dosage of lipid emulsion or other resuscitative drugs in the pregnant patient, the usual doses used in nonpregnant individuals should be administered
In addition to its uterotonic effect, oxytocin is a systemic vasodilator and a negative inotrope and therefore may precipitate cardiovascular collapse if administered in large (5–10 international units) bolus doses. Although beyond the scope of this Consensus Statement, staff should be familiar with contraindications to and side effects of commonly used uterotonic drugs.
Current guidelines and case reviews support rapid delivery of the fetus in the setting of maternal cardiac arrest unresponsive to CPR,yet one-third of these patients remain undellivered at the time of death. When vaginal delivery is not immediately possible, perimortem cesarean delivery (PMCD) is required in order to improve the chance of ROSC and maternal and fetal survival. Delivery should be performed as soon as possible if ROSC has not occurred within minutes of the start of the cardiac arrest. Teams should continue CPR throughout and strive to make incision at 4 minutes in order to effect fetal delivery at 5 minutes after the start of cardiac arrest. The team should be actively preparing for expedited delivery as soon as the arrest is confirmed. The decision to do an operative vaginal delivery instead of PMCD should be at the discretion of the obstetrician.
Proposed mechanisms for the benefits of PMCD include immediate relief of vena caval obstruction with improved venous return and cardiac output, decreased oxygen demand, and improved pulmonary mechanics. Although definitive evidence is lacking (and may be unobtainable), numerous reports describe ROSC or improvement in hemo- dynamics after delivery has occurred.46–50,52–69 In a series of 38 cases of PMCD reported in 2005, 12 of 20 women for whom maternal hemodynamic outcome was recorded had ROSC immediately after delivery; in no cases did PMCD worsen maternal status.48 In a 2012 review of 91 published cases of maternal cardiac arrests, 54% of mothers survived to hos- pital discharge.50 PMCD was performed in 76 (87%) viable pregnancies. Although two-thirds of the arrests occurred in highly monitored areas of the hospital and 89% of the arrests were witnessed, only 7% of patients were delivered within 5 minutes. PMCD was determined to have benefited the mother in 32% of cases and to have caused no harm in any of the others. In this series, in-hospital arrest and PMCD within 10 minutes were associated with better maternal outcomes.
Although the AHA and others propose aiming for delivery within 5 minutes of the onset of maternal arrest with- out ROSC, it is difficult to achieve delivery within such a timeframe. In the 2012 review, only 4 of 76 women were delivered within 5 minutes. Under the ideal condi- tions that prevailed in a study of simulated maternal arrests, only 14% of teams randomized to transport to the OR for PMCD made incision within 5 minutes.70 Only 57% of teams randomized to perform PMCD at the site of arrest without transport made incision within 5 minutes.
Neonatal survival may be optimized (if past viability at 24–25 weeks’ gestation) when the fetus is delivered within 5 minutes of maternal arrest. Although maternal and neo- natal survival have been reported when even longer intervals from arrest until ROSC occurred, prolonged low flow states increase the risk of permanent maternal and neonatal disabilities or demise.
In the absence of an obstetrician or surgeon or in circum- stances such as an out-of-hospital arrest, it may be difficult or impossible to perform immediate delivery. However, in most situations, the timing of delivery remains more critical than the location of delivery. When maternal cardiac arrest occurs in the Labor and Delivery unit, Emergency Medicine Department or Intensive Care Unit (ICU), transporting the arrested patient to the OR for delivery is not recommended. Patient transport distracts rescuers from the core tasks of resuscitation, interferes with high-quality, continuous chest compressions, and delays delivery. Based on reviews of maternal arrests in the literature, simulation studies, and anecdotal reports, the Committee strongly recommends performing PMCD (or operative vaginal delivery) at the site of arrest rather than moving to the nearest OR.
If PMCD is performed and results in ROSC, transport to the nearest OR can occur after delivery when patient condition permits. Similarly, if ROSC occurs without prior delivery, transport to the OR can be undertaken, with the team ready to perform immediate cesarean delivery should the condition of the mother or fetus deteriorate. Subsequent transfer to the ICU for continuing care should take place when the clinical situation permits. While sterile preparation of the skin is not a priority during PMCD, teams electing to perform it should do so within the first few minutes of the arrest. Early sterile preparation may serve as a visual prompt to all staff present that PMCD is impending, and help to avoid potential delays to incision by allowing the solution time to dry.
In the absence of an obstetrician or surgeon or in circumstances such as an out-of-hospital arrest, it may be difficult or impossible to perform immediate delivery. However, in most situations, the timing of delivery remains more critical than the location of delivery. When maternal cardiac arrest occurs in the Labor and Delivery unit, Emergency Medicine Department or Intensive Care Unit (ICU), transporting the arrested patient to the OR for delivery is not recommended. Patient transport distracts rescuers from the core tasks of resuscitation, interferes with high-quality, continuous chest compressions, and delays delivery. Based on reviews of maternal arrests in the literature, simulation studies, and anecdotal reports, the Committee strongly recommends performing PMCD (or operative vaginal delivery) at the site of arrest rather than moving to the nearest OR.
If PMCD is performed and results in ROSC, transport to the nearest OR can occur after delivery when patient condition permits. Similarly, if ROSC occurs without prior delivery, transport to the OR can be undertaken, with the team ready to perform immediate cesarean delivery should the condition of the mother or fetus deteriorate. Subsequent transfer to the ICU for continuing care should take place when the clinical situation permits. While sterile preparation of the skin is not a priority during PMCD, teams electing to perform it should do so within the first few minutes of the arrest. Early sterile preparation may serve as a visual prompt to all staff present that PMCD is impending, and help to avoid potential delays to incision by allowing the solution time to dry.
Render these institutionally specific
If you are still a non believer of the use of a checklist- and say there is no way that I am using this checklist in this chaos, then may I remind you of this aircraft accident-where both engines were out, one on fire and they had 41/2 mins to impact! emergency land at the Hudson river where this plane carrying 1155 passengers flew into a flock of geese causing engine failuer and the captain instucted its first officer to bring out the emergency manual and read out the steps in the checklist
The AHA guidelines for postresuscitation care should be followed to prevent secondary deterioration in maternal condition. In patients who are status post-delivery and remain refractory to resuscitation interventions (no ROSC), the use of mechanical circulatory support such as venoar- terial extracorporeal membrane oxygenation or cardiac bypass may be appropriate as a bridging intervention if
Available. Correcting reversible etiologies of arrest in an otherwise healthy parturient can lead to rapid return of cardiac output after resuscitation and delivery. As a result, health care teams may need to manage uterine bleeding in the post-arrest patient. The return of cardiac output may also result in maternal awareness, necessitating the provi- sion of analgesic or amnestic medications. Maternal transfer to an ICU should be accomplished as soon as possible after PMCD is completed. Skilled intensivist and nursing care are essential regardless of the patient’s location and should be directed according to the suspected cause of the arrest.
In most patients, delivery will relieve vena caval com- pression, and the supine position will then optimize the quality of chest compressions and facilitate access for lap- arotomy, surgical repair and vascular access placement. If uterine distension or an obese abdominal wall continues to obstruct venous return to the heart, LUD or abdominal wall displacement should be maintained. After ROSC in an undelivered patient, left uterine displacement should be maintained to optimize uterine blood flow and venous return and thus minimize the risk of recurrent cardiac arrest.
Therapeutic hypothermia is recommended in coma- tose nonpregnant patients after cardiac arrest to decrease the impact of injury to cardiac or neuronal tissue.15,82 Therapeutic hypothermia has been reported in several women who had a cardiac arrest during the first half of pregnancy.83–85 No adverse fetal effects resulted, except in one case in which multiple other complications were pres- ent that could have explained or contributed to the still- birth.85 Hypothermia has been used during pregnancy for maternal neurosurgical and cardiac procedures; however, we could find no reports regarding the use of therapeutic hypothermia after cardiac arrest in undeliv- ered women closer to term. Based on recommendations for nonpregnant patients after cardiac arrest, we believe that therapeutic hypothermia for maternal benefit should be strongly considered after cardiac arrest in obstetric or
¾ were due to provider incompetence- What we do is intrinsically dangerous- to practice medicine in this domain.
Go back to your institution and be a patient safety advocate- talk to your nurse manager
This Consensus Statement supports the current C-A-B sequence (AHA)
While respiratory arrest may be the initial event precipitating maternal collapse (e.g., magnesium or opioid overdose, high neuraxial block, hypoventilation after eclamptic seizure, failed intubation/ventilation after induction of general anesthesia), cardiac arrhythmias may develop concurrently or shortly thereafter.
The prompt provision of high quality chest compressions with minimal interruptions is emphasized by the C-A-B sequence. Health care teams should be aware that pregnant women develop hypoxia and acidosis rapidly during apnea because of greater basal metabolic rate, decreased functional residual capacity, and fetal oxygen requirements. Adequate ventilation must therefore be initiated as soon as possible, in parallel with effective chest compressions and defibrillation, if indicated.
This Consensus Statement supports the current C-A-B sequence (AHA)
While respiratory arrest may be the initial event precipitating maternal collapse (e.g., magnesium or opioid overdose, high neuraxial block, hypoventilation after eclamptic seizure, failed intubation/ventilation after induction of general anesthesia), cardiac arrhythmias may develop concurrently or shortly thereafter.
The prompt provision of high quality chest compressions with minimal interruptions is emphasized by the C-A-B sequence. Health care teams should be aware that pregnant women develop hypoxia and acidosis rapidly during apnea because of greater basal metabolic rate, decreased functional residual capacity, and fetal oxygen requirements. Adequate ventilation must therefore be initiated as soon as possible, in parallel with effective chest compressions and defibrillation, if indicated.
simulation studies on maternal cardiac arrest and PMCD have demonstrated that, even under ideal circumstances, trans- port from a labor room to the OR delayed uterine incision.70 Median (interquartile range) times from simulated maternal arrest to “incision” were approximately 4 (4–5) and 8 (7–9) minutes, respectively, when cesarean delivery was per- formed in the labor room compared with the OR.70 Most of the additional time was spent on tasks associated with the preparation for and recovery from exiting the labor room and entering the OR, rather than actual transit time (50 ± 13 seconds).70 Transport also resulted in more interruptions in chest compressions and degradation in the quality of chest compressions.70,73 We recommend that PMCD be performed at the bedside whenever possible in any pregnant patient &gt;20 weeks’ gestation who sustains a cardiac arrest.
simulation studies on maternal cardiac arrest and PMCD have demonstrated that, even under ideal circumstances, trans- port from a labor room to the OR delayed uterine incision.70 Median (interquartile range) times from simulated maternal arrest to “incision” were approximately 4 (4–5) and 8 (7–9) minutes, respectively, when cesarean delivery was per- formed in the labor room compared with the OR.70 Most of the additional time was spent on tasks associated with the preparation for and recovery from exiting the labor room and entering the OR, rather than actual transit time (50 ± 13 seconds).70 Transport also resulted in more interruptions in chest compressions and degradation in the quality of chest compressions.70,73 We recommend that PMCD be performed at the bedside whenever possible in any pregnant patient &gt;20 weeks’ gestation who sustains a cardiac arrest.
AHA - immediate provision of high-quality chest compressions and fetal delivery within 5 minutes in the event of maternal cardiac arrest (at &gt;20 weeks’ gestation).1 However, the following two statements both appear in the 2010 AHA Guidelines: (1)”Emergency cesarean section may be considered at 4 minutes after onset of cardiac arrest if there is no ROSC,” and (2) “if no ROSC by 4 minutes of resuscitative efforts, consider performing immediate emergency cesarean section: Aim for delivery within 5 minutes of onset of resuscitative efforts” (AHA algorithm for Maternal Cardiac Arrest).1 These two statements may create confusion with respect to situations in which resuscitative efforts do not start until several min- utes after the arrest (likely a common occurrence). In the above scenario, chest compressions and BLS/ACLS should be continued while preparations are made for an immediate cesarean delivery in the labor room, but it is not necessary to wait for an additional 4 minutes to elapse before delivery. If there is no ROSC, PMCD should be performed as soon as possible to help maternal and fetal survival. The AHA also states that: “The rescue team is not required to wait 5 min- utes before initiating emergency hysterotomy, and there are circumstances that support an earlier start.”1
AED best choice for initial resuscitation because health care teams rendering care in those areas may be less familiar with the use of a manual defibrillator. The AHA addressed the use of AEDs in the 2010 guidelines: “Despite limited evidence, AEDs may be considered for the hospital setting as a way to facilitate early defibrillation (a goal of shock delivery &lt;3 minutes from collapse), especially in areas where staff have no rhythm rec- ognition skills or defibrillators are used infrequently.”15 When in AED mode, teams have access to (and the benefit of) timed two-minute intervals to guide routine analysis and shock that may be missed in the manual defibrillation (non-AED) mode unless an experienced provider is leading the resuscitation. Use of a defibrillator with both AED and non-AED modes (with default set in the AED mode) provides the Code Team with the option to use manual override upon their arrival.
Some health care professionals favor escorting fam- ily members out of the room during CPR, based on concerns ranging from medico-legal liability to that of family mem- bers becoming traumatized, distressed, or disrupting/delay- ing critical, life-saving interventions.97 A simulation study of emergency medicine residents demonstrated delayed defi- brillation by residents randomized to scenarios including an overtly grieving family member, versus those scenarios with a quiet family member or no family member present.98 Resuscitation in the obstetric setting may be unique because arrest or death is usually unanticipated, a happy outcome for mother and baby is the expected norm, and family are frequently present in the room at the time of collapse. In many critical obstetric events, family members would be confronted with a dire emergency in which two lives were at stake when, moments before, all was well. Witnessing an emergent PMCD during CPR of a pregnant patient may be particularly traumatic. Also, the need for multiple teams may make space a critical issue, particularly if delivery is occurring in a labor room or the Emergency Department.
AHA, the Emergency Nurses Association and public opinion- favor allowing family members to remain close to the patient during CPR.
Family members view it as a right rather than a privilege to be with a loved one during their last moments..
facilitate the grieving process
study found that relatives who did not witness CPR experienced symptoms of post- traumatic stress disorder, anxiety and depression more frequently than those who did witness CPR.99 Loved ones may achieve closure by seeing that everything that could have been done was done. Succinctly stated, what families see during a code, although difficult, may be far less dif- ficult than what they can imagine.97 If the decision is made to allow family members to be present during resuscitation, a staff member not actively participating in the code should be designated to care for and support the family members.
Some health care professionals favor escorting fam- ily members out of the room during CPR, based on concerns ranging from medico-legal liability to that of family mem- bers becoming traumatized, distressed, or disrupting/delay- ing critical, life-saving interventions.97 A simulation study of emergency medicine residents demonstrated delayed defi- brillation by residents randomized to scenarios including an overtly grieving family member, versus those scenarios with a quiet family member or no family member present.98 Resuscitation in the obstetric setting may be unique because arrest or death is usually unanticipated, a happy outcome for mother and baby is the expected norm, and family are frequently present in the room at the time of collapse. In many critical obstetric events, family members would be confronted with a dire emergency in which two lives were at stake when, moments before, all was well. Witnessing an emergent PMCD during CPR of a pregnant patient may be particularly traumatic. Also, the need for multiple teams may make space a critical issue, particularly if delivery is occurring in a labor room or the Emergency Department.
AHA, the Emergency Nurses Association and public opinion- favor allowing family members to remain close to the patient during CPR.
Family members view it as a right rather than a privilege to be with a loved one during their last moments..
facilitate the grieving process
study found that relatives who did not witness CPR experienced symptoms of post- traumatic stress disorder, anxiety and depression more frequently than those who did witness CPR.99 Loved ones may achieve closure by seeing that everything that could have been done was done. Succinctly stated, what families see during a code, although difficult, may be far less dif- ficult than what they can imagine.97 If the decision is made to allow family members to be present during resuscitation, a staff member not actively participating in the code should be designated to care for and support the family members.
Fetal monitors are electrical contact points to both mother and fetus. If fetal monitors are present during mater- nal defibrillation, there is the potential for arcing or electri- cal burns. However, the risk is theoretic and defibrillation
should never be delayed or withheld in order to first remove
fetal monitors. There are two types of monitors typically used to monitor the fetal heart rate: external and internal. If an internal fetal monitor, i.e., FSE, is being used, we recom- mend disconnecting the scalp monitor from the electrical source if there is a staff person present and capable of doing so. However, removal of an FSE may require additional time and/or distract from more important interventions. If an external fetal monitor is in place, removing it from the patient’s abdomen should require very little time and may be necessary in preparation for PMCD. On balance, removal of either external or internal fetal monitors is recommended if the situation permits but should never delay defibrillation.
Moreover, in the setting of maternal cardiac arrest fetal monitoring is neither practical, logical or associated with any direct clinical benefit to mother or fetus. A focus on fetal monitoring during a maternal code is likely to result in the misallocation of provider attention and delays in criti- cal interventions. If ROSC does not occur after the first few minutes of resuscitation, current recommendations are for rapid delivery for maternal and fetal benefit, regardless of fetal heart rate.1,47–50
Local anesthetic-induced cardiac arrest in a preg- nant patient should be managed as in any other patient. The pregnant state may confer enhanced sensitivity to LAST, and cardiac toxicity resulting from high local anesthetic plasma concentrations may be particularly resistant to conventional resuscitative interventions. If standard resuscitative measures do not result in rapid ROSC, lipid emulsion should be admin- istered as an adjunctive therapy if local anesthetic-induced cardiac arrest is suspected. The dosing and timing of lipid emulsion therapy during resuscitation of pregnant patients should follow standard algorithms used in nonpregnant patients (see below).33,41–43,101 The fetal risk of lipid emulsion therapy remains unknown, but as in any maternal cardiopul- monary arrest, the fetus is best served by optimal manage- ment of the mother. Lipid emulsion is routinely administered as part of parenteral nutrition in severe cases of hyperemesis gravidarum and in extremely low birth-weight infants; the primary complication with the use of lipid emulsion in these settings appears to be infection
Checklists are an integral part of the culture of safety in other highly dynamic, high-stakes domains. In the aviation industry, checklists are used for both routine (e.g., pre-flight safety checklist), and emergent situations characterized by extreme time pressure. For example, U.S. Airways 1549 suffered dual engine failure while mid-air. With only minutes before impact, the captain instructed the first officer to read through the checklist on emergency landings while he remained at the controls. The two success- fully landed the aircraft with no casualties.104 Checklists are slowly becoming more integrated into the medical domain for routine situations (e.g., preprocedure or preincision sur- gical time-outs). Simulation studies suggest checklists may help medical teams perform optimally during emergencies; however, periodic training is necessary in order to familiar- ize health care provider teams with their use.