In this presentation we will discuss
First trimester US especially TVS is an integral part for confirmation of intrauterine pregnancy and to rule out ectopic pregnancy.
First trimester US helps us in suggesting conceptus viability.
First trimester US especially TVS is very efficient in approaching and evaluating the cause of vaginal bleeding.
Nuchal translucency
It is a sonographic pre natal screening scan to detect cardiovascular abnormality in a fetus.
NT can also detect altered extra cellular matrix composition and limited lymphatic drainage
Nuchal translucency
It is a sonographic pre natal screening scan to detect cardiovascular abnormality in a fetus.
NT can also detect altered extra cellular matrix composition and limited lymphatic drainage
Obstetrical Ultrasound• Introduced in the late 1950’s ultrasonography is a safe, non- invasive, accurate and cost-effective means to investigate the fetus• Computer generated system that uses sound waves integrated through real time scanners placed in contact with a gel medium to the maternal abdomen• The information from different reflections are reconstructed to provide a continuous picture of the moving fetus on the monitor screen
In this presentation we will focus on aetiological factors that cause infirtility. Our focus is on US depiction of these aetiological factors to help physician in the management of infirtility.
We have nothing to do with direct radiological intervention in the management of infirtility in this presentation.
ultrasonography in obstetrics, usg in obstetrics, ultrasound in obstetrics, doppler in obstetrics, usg doppler in obstetrics, signs in ultrasound, anomaly scan, pregnancy scan, ultrasound in pregnancy,
Obstetric ultrasound uses sound waves to produce pictures of a baby (embryo or fetus) within a pregnant woman, as well as the mother's uterus and ovaries. It does not use ionizing radiation, has no known harmful effects, and is the preferred method for monitoring pregnant women and their unborn babies.
Dislocation of joint is very tricky. In this presentation radiological evaluation of Dislocation of various joints will be discussed.
This is one of the best pictoral review of important joint dislocations
Renal Color Doppler Ultrasound.
After studying this presentation one will be able to perform and interpret ultrasound.
This presntation in my opinion is best short analog to text.
In this presentation we will discuss the bone age assessment mainly focusing wrist radiograph.
we shall also highlights some points in adult bone age
Basically it is an introduction. We shall not discuss its judicial importance
Role of medical imaging in developemental dysplasia of Hip Dr muhammad Bin Zu...Dr. Muhammad Bin Zulfiqar
In this presentation we will discuss the role of medical imaging---plain Radiography, Ultrasound,Arthrography, CT and MRI in the evaluation of Developemental dysplasia of hip. Our main focuss will be on Sonographic evaluation.
In this presentation we will discuss the basic of axial trauma from head to pelvis. We will discuss the important key points that aids in the diagnosis of axial trauma
This is a chapter from Grainger and Allison. I have Coolected all images from chapter 21 with caption in this presentation.
In my opinion it will be very benificial to have this in your android.
This presentation is the first series of the MR imaging of Knee.
In this presentation MRI anatomy has been discussed. As we all know good knowledge of medical imaging three dimensional anatomy is key for good reporting.
Hope we all get benifitted.
Suggestions are most welcome
This is a chapter from Grainger and Allison. I have Coolected all images from chapter 20 with caption in this presentation.
In my opinion it will be very benificial to have this in your android. ,
This presentation is almost a complete Pictoral view of Radiograph chest.
This presentation will help radiologist in daily reporting.
This presentation will help physicians, surgeons, anesthetist and almost all medical professionals in diagnosing commonly presenting cardiac diseases.
This will also help all in preparaing TOACS examination.
This is a chapter from Grainger and Allison. I have Coolected all images from chapter 19 with caption in this presentation.
In my opinion it will be very benificial to have this in your android. ,
In this presentation we will dscuss the imp imaging features of Posterior fossa tumors in pediatric age group.
Medulloblastoma
Pilocytic Astrocytoma
Ependymoma
Brainstem Glioma
Schwanoma
Meningioma
Epidermoid Cyst
Arachnoid Cyst
In this presentation we will discuss about the
Anatomy of Prostate
Technique of Transrectal US
Carcinoma Prostate and
Different modes of prostatic biopsy.
In this presentation we shall discuss all fractures with specific names .
This is a pictoral review.
This presentation will be very helpful for radiologist to have in their androids to help them in rapid reporting
In this presentation all images of Chapter 18 from Grainger and Allison have been discussed.
Our aim is to discuss authentic material .
This is only for educational purposes.
In this chapter air space infilteration have been discussed. Ground glass haze and consolidation are discussed in detail.
This presentation is a selection of images from 17th chapter of grainger and allison.
Our aim is to provide standard and proved cases of the disease process.
This all is for educational purpose
Objectives of this presentation are
Introduction to ct
Cross sectional anatomy
Common important pathologies
This presentation is aimed to educate beginers to help in ct interpretetion.
16 High Resolution Computed Tomography of Interstitial and Occupational Lung ...Dr. Muhammad Bin Zulfiqar
This presentation is collection of images from chapter 16 of Grainger and Allison.
Inthis we will discuss the ILD.
This is only for educational purposes.
This Presentation is a collection of chapter 5 images from Grainger and Allison.
Our aim is to study authentic data.
This is only for educational purposes
In this presentation we will discuss role of high resolution in characterizing normal variant and pathologies of spinal pathologies.
This is a pictoral review.
This presentation provides sufficient material for anyone who wants is interested in interventional radiology. Here we will discuss the available facilities, mechanisms and equipments.
In my opinion this presentation will prove a footstep in interventional radiology
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
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Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
Triangles of Neck and Clinical Correlation by Dr. RIG.pptx
First trimester ultrasound Dr. Muhammad Bin Zulfiqar
1. FIRST TRIMESTER ULTRASOUND
Dr. Muhammad Bin Zulfiqar
PGR IV FCPS Services Institute of Medical Sciences / Hospital
radiombz@gmail.com
2. AIMS
• Assessment of gestational age
• Fetal viability and outcomes
• Maternal wellbeing
•
3. INDICATIONS
• Unsure of Dates
• Vaginal Bleeding
• Pelvic Pain
• Exclude an ectopic pregnancy
• Threatened Miscarriage
• Nuchal Translucency (11-13.6 weeks : CRL 45-84mm)
• Maternal past history
4. HISTORY BEFORE US
• Gravidity
• Parity (Miscarriage, Termination of Pregnancy (T.O.P))
• Fertility treatment
• Date of Last Menstrual Period
• Other pregnancy History
• Gynecological History
5. PROBE SELECTIONS
• Curved linear probe approximately 3-7 MHz depending upon
maternal factors
• Transvaginal probe approximately 5-9 MHz (Use of non-latex cover
if required
6. PATIENT PREPARATION
• Emptying of bladder 2 hours before US, then drinking of at least 1
liter of water. Ask patient do not go to the toilet till exam
• For TVS approach empty bladder is needed
7. APPROACH
• Confirm presence of intrauterine gestation
• Look for double decidual reaction.
• Look for no of gestational sacs. If multiple pregnancy
• Confirm number of fetuses
• Number of sacs
• number of placentas
• to determine chorionicity.
• Monochorionic / Monoamniotic(MCMA)
• Monochorionic / Diamniotic(MCDA)
• Dichorionic / Diamniotic (DCDA)
Continued
8. APPROACH
• Confirm heart beat & rate with M-Mode only (Use of Color or
Doppler traces is not recommended in the 1st trimester)
• Measure CRL to calculate gestational age and Estimated Date of
Delivery(EDD).
If too early to see the fetal pole measure the average sac diameter.
Continued
9. APPROACH
• Cervix - assess if closed and measure length between internal and
external os
• Assess placental location and distance from internal os (may lie
close to os at this stage)
• Check for retroplacental hemorrhages, placental masses etc.
• Assess maternal ovaries, adnexa and Pouch Of Douglas (P.O.D)
10. TECHNIQUE
• Uterus – longitudinal and transverse
• Both ovaries
• Adnexa
• Cervix and Pouch-Of-Douglas
• Gestational sac - longitudinal and transverse
Continued
11. TECHNIQUE
• Yolk sac if visible
• Fetal pole
• M mode fetal heart
• Document the normal anatomy. Any pathology found in 2 planes,
including measurements.
12. GESTATIONAL SAC
• The gestational sac(GS) is the earliest sonographic finding in pregnancy.
• It will be difficult to see if the mother has a retroverted uterus or fibroids.
• The GS is an echogenic ring surrounding an anechoic centre.
• An ectopic pregnancy will appear the same but it will not be within the
endometrial cavity.
Continued
13. GESTATIONAL SAC
• The GS is not identifiable until approximately 4.5 weeks with a
transvaginal scan.
• Gestational sac size should be determined by measuring the mean
of three diameters. These differences rarely effect gestational age
dating by more than a day or two.
14. MEAN SAC DIAMETER TVS
• Mean Sac Diameter measurement is
used to determine gestational age
before a Crown Rump length can be
clearly measured. The average sac
diameter is determined by measuring
the length, width and height then
dividing by 3
15. YOLK SAC
• The yolk sac appears during the 5th week.
• It is the second structure to appear after the GS.
• It should be round with an anechoic centre.
• It should not be calcified, misshapen or >5mm from the inner to inner
diameter.
• Yolk sacs larger than 6 mm are usually indicative of an abnormal
pregnancy.
• Failure to identify (with transvaginal ultrasound) a yolk sac when the
gestational sac has grown to 12 mm is also usually indicative of a failed
pregnancy.
16. YOLK SAC TVS
5 week gestation. Yolk Sac Only seen. The yolk
sac should be visible before a clearly definable
embryonic pole.
17.
18. HEART BEAT
• Using a transvaginal approach the fetal heart beat can be seen flickering before the
fetal pole is even identified.
• It will be seen alongside the yolk sac.
• It may be below 100 beats per minute but this will increase to between 120- 180
beats per minute by 7 weeks.
• In the early scans at 5-6 weeks just visualizing a heart beating is the important thing.
• Failure to identify fetal cardiac activity in a fetus whose overall length is greater than 4
mm is an ominous sign.
• Sometimes there is difficulty distinguishing between the maternal pulse and fetal
heart beat. Often technicians will take the mothers pulse at the same time to check if
it is the fetus or the mothers .
19. HEART RATE M MODE
• The very early embryonic heart
will be a subtle flicker. This may
be measured using M-
Mode(avoid Doppler in the first
trimester due to risks of bio
effects). Initially the heart rate
may be slow.
21. CROWN RUMP LENGTH (CRL)
• The CRL is a reproducible and accurate method for measuring and dating a
fetus.
• Early ultra sonographers used this term (CRL) because early fetuses also
adopted the sitting in the chair posture in early pregnancy. After 12 weeks, the
accuracy of CRL in predicting gestational age diminishes and is replaced by
measurement of the fetal biparietal diameter.
• In at least some respects, the term "crown rump length" is misleading: there is
no fetal crown and no fetal rump to measure for most of the first trimester.
22. CROWN RUMP LENGTH (CRL)
• Until 53 days from the LMP, the most caudad portion of the fetal cell mass is
the caudal neuropore, followed by the tail. Only after 53 days is the fetal rump
the most caudal portion of the fetus.
• Until 60 days from the LMP, the most cephalad portion of the fetal cell mass is
initially the rostral neuropore, and later the cervical flexure.
• After 60 days, the fetal head becomes the most cephalad portion of the fetal
cell mass.
• What is really measured during this early development of the fetus is the
longest fetal diameter.
• From 6 weeks to 9.5 weeks gestational age, the fetal CRL grows at a rate of
about 1 mm per day.
23. CRL
• The Crown Rump Length (CRL)
measurement in a 6 week gestation.
A mass of fetal cells, separate from
the yolk sac, first becomes apparent
on transvaginal ultrasound just after
the 6th week of gestation. This mass
of cells is known as the fetal pole.
24. CROWN RUMP LENGTH (CRL)
• At 10 weeks, visualize
4 jointed limbs, feet and
hands.
25. CROWN RUMP LENGTH (CRL)
• From 12 weeks the basic morphology of
the fetus is visible
26. NUCHAL TRANSLUCENCY
• NUCHAL SONOLUCENCY / FULLNESS / EDEMA
• = skin thickening of posterior neck measured between calvarium
+dorsal skin margins.
• After 13.6 weeks regarded as nuchal fold thickness.
• One inner other outer
27. NUCHAL TRANSLUCENCY
• Considered abnormal when
• > 0.3 mm during 9-13 weeks MA
• >0.5 mm during 14-21 weeks MA
• >0.6 mm during 19-24 weeks MA
28. NUCHAL TRANSLUCENCY
• The Nuchal Translucency is used
to provide a risk assessment for
chromosomal abnormalities,
specifically Trisomy 13,18 and 21
(Down's Syndrome).
29. FETAL LEGS
• The legs are usually crossed at the
ankles. Confirm the presence and
symmetry of the long bones.
30. FETAL LEGS &FEET
• The correct angle the feet to legs
can be confirmed. They should be
at 90 degrees i.e. perpendicular or
Talipes should be suspected.
31. FETAL UPPER LIMB
• The humerus, radius and ulna and the
presence of hands are imaged from 11
weeks.
32. FETAL BRAIN
• 12 week choroids take up most of the
space within the ventricles.
33. MULTIPLE GESTATIONS
• Twins: 2% of all deliveries-12% of NVD.
• Monozygotic 1/250 (1/3 of twins)
• Triplets: 1/802
• Quadruplet: 1/803
• Multiple gestations are HIGH RISK pregnancies.
• The major problems are:
• PRETERM BIRTH
• LOW BIRTH WEIGHT
34. FETAL TWINNING
• Initially twins may be identified as 2 separate gestational sacs (i.e. diamniotic,
dichorionic).
• There may be 2 fetal poles within the same gestational sac (monochorionic).
• It is easier to determine chorionicity earlier in the pregnancy depending on the
chorionicity and amnionicity.
• It is a sad situation when a "vanishing twin" occurs, which is about 20% of twin
pregnancies. In these cases, one of the twins fails to grow and thrive. Instead,
its development arrests and it is reabsorbed, with no evidence at delivery of
the twin pregnancy.
40. THICKENED NUCHAL TRANSLUCENCY
• One of the parameters used in sequential screening (SS) for Down’s syndrome in
first trimester
– SS: Pregnancy associated plasma protein levels, hCG levels, NT thickness
• Measured during 11-13.6 wks gestational age
• Seen on sagittal image as increased subcutaneous non-septated fluid in posterior
fetal neck
• Measurement >3mm usually considered abnormal, however exact cut off
measurements are dependent on maternal age/gestational age
• Detection rate of screening for Down’s Syndrome in first trimester:
– sequential screening with NT: 82-87%
– NT alone: 64-70%.
46. PARTIAL OVULAR DETACHMENT
• The maternal circulation inside the placenta starts peripherally (in the placental
margins) and is associated to physiological oxidative phenomena that may
lead to membranes rupture and formation.
• The abnormal development of such membranes may result in subchorionic
hemorrhage, enhancing the predisposition to an adverse gestational outcome
at the third trimester (PPROM and PTL).
• Such abnormality is common and also denominated as subchorionic
hemorrhage or trophoblastic hematoma, being visualized in more than 18% of
cases of threatened miscarriage.
• The presence of fetal heart activity confers an excellent prognosis. Clinically,
subchorionic hemorrhage may course with vaginal bleeding.
47. PARTIAL OVULAR DETACHMENT
• Sonographic finding of partial
ovulation detachment:
• Heterogeneous crescent shape
lesion is appreciated adjacent to
the gestational sac with gross
debris and shows mild
compression and deformation.
• Fifteen days follow up
demonstrates resolution.
48. PARTIAL OVULAR DETACHMENT
• Sonographic findings of
incomplete decidual fusion.
• Anechoic homogeneous
collection is seen around GS at
7 and 11 week respectively.
49. RETAINED PRODUCTS OF CONCEPTION
• RPOCs are characterized by a thickened, disorganized and
heterogeneous endometrium, with ill-defined mucosal layers and
cavitary line, either with or without the presence of gestational sac.
• Clinically, the women presents abdominal pain and relative vaginal
bleeding(.
• In the presence of an intact gestational sac and closed cervix, the
difficulty in a spontaneous resolution will be higher, requiring
surgical evacuation
50. RETAINED PRODUCTS OF CONCEPTION
• Sonographic finding of RPOCs
as evidences by heterogeneous
ill defined endometrial lined
lesion with cystic changes and
specks of air.
52. RETAINED PRODUCTS OF CONCEPTION
• Transvaginal sonography
without (A) and with (B)
color Doppler imaging in
a case of RPC with
endometrial expansion
(arrows).
55. EARLY EMBRYO DEATH
• Some sonographic findings characterize an embryo death in the first half of
the first trimester in early phases, before the crown-rump length can be
measured.
• The following aspects are highlighted:
• Small, hyperechoic yolk sac,
• Hydropic yolk sac increased in volume with diameter > 7 mm
• Even small amniotic cavity disproportionate to the gestational sac size.
• Before the 9th week, small gestational sac may be associated with aneuploidy.
56. EARLY EMBRYO DEATH
• Sonographic signs of early embryo death.
• A. Intrauterine pregnancy with no sign of embryo, with small, hyperechoic yolk sac.
• B. Monochorionic, diamniotic twin gestation with early death of one of the embryos (vanishing
twin syndrome)
57. EARLY EMBRYO DEATH
• Sonographic signs of early embryo death.
• Small Amniotic cavities
58. EARLY EMBRYO DEATH
• Sonographic signs of early embryo death.
• C. Delayed growth of the gestational sac with disproportionate yolk sac.
• D. Hydropic yolk sac and ruptured amniotic sac with floating branches in the chorionic cavity.
61. ANEMBRYONIC GESTATION
• ANEMBRYONIC PREGNANCY= BLIGHTED OVUM
• Abnormal intrauterine pregnancy with developmental arrest prior
to formation of embryo; may occur as a blighted twin
• Empty gestational sac (>6.5 weeks MA)
• yolk sac identified without embryo:
• Gestational sac small / appropriate / large for dates:
• decrease in gestational sac (GS) size
• GS fails to grow by >0.6 mm/days on serial scans
• Irregular weakly echogenic decidual reaction of <2 mm
• Distorted sac shape
62. ANEMBRYONIC GESTATION
• Transabdominal scan:
• GS size >10 mm of mean diameter without DDS
• GS size >20 mm of mean diameter without yolk sac
• GS size >25 mm of mean diameter without embryo
• Transvaginal scan
• GS size >8 mm of mean diameter without yolk sac
• GS size >16 mm of mean diameter without cardiac activity
63. ANEMBRYONIC GESTATION
• Sonographic signs of Anembryonic gestation.
• A: GS with 12 mm in mean diameter, without yolk sac.
• B: One week later, the GS remains without yolk sac.
68. GESTATIONAL TROPHOBLASTIC DISEASE
• The typical sonographic finding in most of cases of complete hydatidiform mole is a
echogenic, intracavitary solid mass with intermingled, small cystic loci resembling a
"snow storm", corresponding to the vesicles that macroscopically characterize this
condition.
• The higher the gestational age, the larger the vesicles visualized as homogeneous
anechoic images, increasing the method specificity.
• The ultrasonography sensitivity will depend on the gestational age at the moment of
the diagnosis.
• Ultrasonography can detect vesicles with > 2 mm in diameter.
• In early pregnancies with trophoblastic disease, the sonographic method accuracy is
limited, hindering the differentiation of gestational trophoblastic disease from other
conditions involving the endometrial cavity.
69. PARTIAL HYDATIFORM MOLE
• Partial hydatidiform mole offers higher diagnostic difficulty by ultrasonography.
• In a reasonable number of cases, this disease presents as an empty gestational sac
corresponding to anembryonic gestation, or as early embryo death.
• However, two criteria have been described in the literature: gestational sac
transverse/anteroposterior diameter ratio > 1,5 and cystic changes, irregularity of increase in
echogenicity of decidual/placenta or myometrial reaction
70. COMPLETE HYDATIFORM MOLE
• Sonographic signs of
complete Hydatiform mole.
Abdominal and
transvaginal US study
demonstrates echogenic
intracavitary contents with
intermingled tiny cystic
areas.
71. PARTIAL HYDATIFORM MOLE
• Partial Hydatiform mole. Thick,
irregular trophoblast, with
sonographic signs suggesting
anembryonic gestation. H/P study
demonstrated the presence of
molar tissue in the evacuation
material.
72. PARTIAL HYDATIFORM MOLE
• Sonographic signs of partial Hydatiform mole. Focal thickening of the placental
bed with predominance of cystic areas and irregularity. Embryo and embryonic
remains (arrow) can be visualized.
73. COMPLETE HYDATIFORM MOLE
Sonographic signs of arteriovenous malformation associated with complete Hydatiform
mole. Large anechoic homogeneous myometrial lacuna with vascular map showing
fistula pattern and low resistivity flow velocity wave.
74. ECTOPIC PREGNANCY
• Sonographic findings of ectopic pregnancy will vary as a function of the gestational
age and site.
• Classically:
• Tubal ring sign
• Adnexal disorganized mass molded to the adnexa and/or cul de sac
• Solid, organized mass with regular margins mimicking a pediculated myomatous nodule,
• clinically progressing with low β-hCG levels,
• presence of a live extra uterine conceptus.
• Uncommon gestational sites may be observed such as abdominal ectopic pregnancy,
cervical ectopic pregnancy and ectopic pregnancy in a previous Cesarean section
pregnancy.
75. ECTOPIC PREGNANCY
• Sonographic findings of
ectopic pregnancy.
• A: Tubal ring sign
(gestational sac in the
adnexa).
• B: Adenexal mass
79. CERVICAL ECTOPIC PREGNANCY
• GS within cervix.
• Abnormally low sac
position.
• On color Doppler :
hypertrophic trophoblastic
ring in the cervical region.
81. INTERSTITIAL ECTOPIC PREGNANCY
• Eccentric gestational sac: the diagnosis is
suggested by visualization of an
intrauterine GS or decidual reaction located
high in the fundus, that is surrounded by
less than 5 mm of myometrium in all planes.
• Interstitial line sign: an echogenic line from
the mass to the endometrial echo.
82. INTERSTITIAL ECTOPIC
PREGNANCY
• Transvaginal ultrasonography reveals, (a) an eccentrically located round ring-like mass (black
arrow) in the left uterine fundus. Note the thin echogenic endometrial stripe (white arrow)
which extends to the inner margin of this mass, (b) It is incompletely surrounded by
myometrium and is compatible with a corneal pregnancy. This measures approximately 2.6 ×
2.6 cm and (c) demonstrates peripheral blood flow on color Doppler interrogation.
83. CESAREAN SCAR ECTOPIC PREGNANCY
• Empty uterus
• Empty cervical canal
• GS in the anterior part of the lower uterine segment
• Absence of myometrium between the bladder wall and the GS.
84. CESAREAN SCAR ECTOPIC PREGNANCY
• 36-year-old pregnant female presenting with heavy vaginal bleeding for 3 days that slowed
to occasional spotting. Patient had a history of two cesarean sections and was later
diagnosed with ectopic cesarean pregnancy. (a-c) Transabdominal and transvaginal
ultrasonography images reveal (a) a viable gestational sac at the site of previous cesarean
scar (black arrow) with a gestational age of 8 weeks 5 days. (b and c) images show the
gestational sac is in the lower uterine segment, just superior to the cervix and intimately
related to the scar anteriorly (white arrows),
Continued
85. CESAREAN SCAR ECTOPIC PREGNANCY
• MRI d) T2 axial view, (e) T2 sagital view and (f) contrast-enhanced images
demonstrate trophoblastic tissue/developing placenta inferiorly with little or no
surrounding myometrium (white arrow) confirming scar pregnancy There is some
mass effect on the superior aspect of the urinary bladder on the right; however, it
does not appear to invade the bladder wall.
86. SUBCHORIONIC HEMORRHAGE (SCH)
• Occurs when there is perigestational hemorrhage and blood collects between the uterine wall
and the chorionic membrane in pregnancy. It is a frequent cause of first and second trimester
bleeding.
• Epidemiology
• It typically occurs within the first 20 weeks of gestation. If seen in the first 10-14 days of
gestation, they are also sometimes termed implantation bleeds.
87. SUBCHORIONIC HEMORRHAGE (SCH)
• Crescentic collection with elevation of the chorionic membrane
• Depending on the time elapsed since bleeding, the collection will
have variable echotexture
• Acute: hyperechoic and may be difficult to differentiate from adjacent
chorion
• Subacute-chronic: decreasing echogenicity with time
• In almost all cases there is extension of the hematoma towards the
margin of the placenta.
96. CONJOINED TWINS
• Conjoined twins are a rare and complex complication of monozygotic
twinning, which is associated with high perinatal mortality.
• Early prenatal diagnosis of conjoined twins allows better counselling of the
parents regarding the management options, including continuation of
pregnancy with post-natal surgery, termination of pregnancy or selective
fetocide in case of a triplet pregnancy.
• With the introduction of high-resolution and transvaginal ultrasound imaging,
accurate prenatal diagnosis of conjoined twins is possible early in pregnancy.
97. CONJOINED TWINS
• Although first-trimester diagnosis of conjoined twins is feasible, false-positive
cases are common before 10 weeks because, earlier in gestation, fetal
movements are limited and monoamniotic twins may appear conjoined.
• As most parents opt for immediate termination of pregnancy at confirmation
of the diagnosis, there are limited data on the prenatal follow-up of conjoined
twins.
• Detailed analysis of case reports where 3D imaging was used indicates that
this modality does not improve on the diagnosis made by 2D ultrasound.
Overall, very early prenatal diagnosis and first-trimester 3D imaging provide
very little additional practical medical information compared to the 11-14
weeks' ultrasound examination.
102. FIRST TRIMESTER: BLEEDING/MISCARRIAGE,
MOLAR CHANGES.
• Miscarriage is defined as the loss of a pregnancy prior to the completion of 24
weeks (Age of viability) gestation and the main maternal symptoms are
bleeding and pain. If a fetal HR has been detected, the risk of spontaneous
miscarriage in singletons is 12.2%.
106. TAKE HOME MESSAGE
• First trimester US especially TVS is an integral part for confirmation of
intrauterine pregnancy and to rule out ectopic pregnancy.
• First trimester US helps us in suggesting conceptus viability.
• First trimester US especially TVS is very efficient in approaching and evaluating
the cause of vaginal bleeding.
At ultrasonography, a crescent-shaped shadow is observed adjacent to the gestational sac, with debris. Gestational sac compression and consequential deformation may occur. In most of cases, a two-week follow-up evaluation confirms the hematoma resorption.
Cause: early arrest of embryonic development related to chromosomal abnormality
GS usually not visualized before 5-5.5 weeks MA; yolk sac forms at 4 weeks MA when GS is 3 mm; embryo usually visualized by 6 weeks MA
normal intradecidual GS routinely detected at 4-5 weeks with a mean sac diameter of 5 mm
First trimester obstetric abnormalities are identified by screening studies or in cases of abnormal vaginal bleeding with the objective of determining the gestation viability.