The document provides guidance on preoperative evaluation and optimization of patients for anesthesia and surgery, noting that a thorough review of medical history, physical exam, and any necessary tests should be completed to ensure a patient's medical conditions are addressed and they are in the best possible condition prior to an elective procedure. Factors like airway assessment, cardiovascular and respiratory status, medications, and ASA classification can help evaluate perioperative risk and determine appropriate anesthesia technique and postoperative management.
The presentation deals with the basics of pre anesthetic checkups, its only for the educations purpose!
Any kind of replication, modifications and republication is strictly prohibited.
All Rights reserved to the Author. 2016
Preoperative investigations and significance.
Dr.Moyukh Chowdhury, MBBS
Indoor Medical Officer,
Department of Surgery,
Sylhet Women's Medical College & Hospital,
Bangladesh .
Preanesthetic evaluation of patients in oral and maxillofacial surgeryPunam Nagargoje
The word is derived from the Greek words an, which means “without” and aithesia which means “feeling”
The use of medical anesthesia was first reported in 1846
The development of anesthesia has made today’s modern surgical techniques possible
• Basic Principles of Anesthesia
• “Triad of General Anesthesia”
need for unconsciousness
need for analgesia
need for muscle relaxation and loss of reflexes
• Preoperative Evaluation
• The preanesthetic evaluation has specific objectives including:
- Establishing a doctor-patient relationship,
- Becoming familiar with the surgical illness and
- coexisting medical conditions,
- Anticipating potential complication
Developing a management strategy for perioperative anesthetic care,
- Obtaining informed consent for the anesthetic plan.
The overall goals of the preoperative assessment are to reduce perioperative morbidity and mortality and to allay patient anxiety.
• Pre-operative
This applied both in evaluation & investigations
• General
This include the following:
1-General condition of the patient.
2-Psychological condition. ( Specially in major operations).
• Specific
This include the following:
1-Related to anaesthesia.
2-Related to the surgery.
• Medical History
1. Review the chart
2. Review previous records
3. Interview the patient
• Demographic Data
Height / weight
Vital signs
Diagnosis
History and Physical Exam
Note any abnormalities
Don’t assume that all problems are listed
• Steps of the preoperative visit :
• Preoperative testing should be performed on a selective basis for purposes of guiding or optimizing perioperative management.
• Pre-op Testing Schema Example
• Preoperative Laboratory Testing:
• only if indicated from the preoperative history and physical examination.
• "Routine or standing" pre operative tests should be discouraged
• -CBC anticipated significant blood loss, suspected hematological disorder (eg.anemia, thalassemia, SCD), or recent chemotherapy.
• -Electrolytes diuretics, chemotherapy, renal or adrenal disorders
• -ECG age >50 yrs ,history of cardiac disease, hypertension, peripheral vascular disease, DM, renal, thyroid or metabolic disease.
• -Chest X-rays prior cardiothoracic procedures ,COPD, asthma, a change in respiratory symptoms in the past six months.
• -Urine analysis DM, renal disease or recent UTI.
• -tests for different systems according to history and examination
• Disease-based indications
Alcohol abuse
CBC, ECG, lytes, LFTs, PT
Anemia
CBC
Bleeding disorder
CBC, LFTs, PT, PTT
Cardiovascular
CBC, creatinine, CXR, ECG, lytes
• Disease-based indications
Cerebrovascular disease
Creatinine, glucose, ECG
Diabetes
Creatinine, electrolytes, glucose, ECG
Hepatic disease
CBC, creatinine, lytes, LFTs, PT
• Disease-based indications
Pregnancy (controversial)
Serum B-hCG- 7 days, Upreg 3 days
Pulmonary disease
CBC, ECG, CXR
Renal disease
CBC, Cr, lytes, ECG
RA
CBC, ECG, CX
The presentation deals with the basics of pre anesthetic checkups, its only for the educations purpose!
Any kind of replication, modifications and republication is strictly prohibited.
All Rights reserved to the Author. 2016
Preoperative investigations and significance.
Dr.Moyukh Chowdhury, MBBS
Indoor Medical Officer,
Department of Surgery,
Sylhet Women's Medical College & Hospital,
Bangladesh .
Preanesthetic evaluation of patients in oral and maxillofacial surgeryPunam Nagargoje
The word is derived from the Greek words an, which means “without” and aithesia which means “feeling”
The use of medical anesthesia was first reported in 1846
The development of anesthesia has made today’s modern surgical techniques possible
• Basic Principles of Anesthesia
• “Triad of General Anesthesia”
need for unconsciousness
need for analgesia
need for muscle relaxation and loss of reflexes
• Preoperative Evaluation
• The preanesthetic evaluation has specific objectives including:
- Establishing a doctor-patient relationship,
- Becoming familiar with the surgical illness and
- coexisting medical conditions,
- Anticipating potential complication
Developing a management strategy for perioperative anesthetic care,
- Obtaining informed consent for the anesthetic plan.
The overall goals of the preoperative assessment are to reduce perioperative morbidity and mortality and to allay patient anxiety.
• Pre-operative
This applied both in evaluation & investigations
• General
This include the following:
1-General condition of the patient.
2-Psychological condition. ( Specially in major operations).
• Specific
This include the following:
1-Related to anaesthesia.
2-Related to the surgery.
• Medical History
1. Review the chart
2. Review previous records
3. Interview the patient
• Demographic Data
Height / weight
Vital signs
Diagnosis
History and Physical Exam
Note any abnormalities
Don’t assume that all problems are listed
• Steps of the preoperative visit :
• Preoperative testing should be performed on a selective basis for purposes of guiding or optimizing perioperative management.
• Pre-op Testing Schema Example
• Preoperative Laboratory Testing:
• only if indicated from the preoperative history and physical examination.
• "Routine or standing" pre operative tests should be discouraged
• -CBC anticipated significant blood loss, suspected hematological disorder (eg.anemia, thalassemia, SCD), or recent chemotherapy.
• -Electrolytes diuretics, chemotherapy, renal or adrenal disorders
• -ECG age >50 yrs ,history of cardiac disease, hypertension, peripheral vascular disease, DM, renal, thyroid or metabolic disease.
• -Chest X-rays prior cardiothoracic procedures ,COPD, asthma, a change in respiratory symptoms in the past six months.
• -Urine analysis DM, renal disease or recent UTI.
• -tests for different systems according to history and examination
• Disease-based indications
Alcohol abuse
CBC, ECG, lytes, LFTs, PT
Anemia
CBC
Bleeding disorder
CBC, LFTs, PT, PTT
Cardiovascular
CBC, creatinine, CXR, ECG, lytes
• Disease-based indications
Cerebrovascular disease
Creatinine, glucose, ECG
Diabetes
Creatinine, electrolytes, glucose, ECG
Hepatic disease
CBC, creatinine, lytes, LFTs, PT
• Disease-based indications
Pregnancy (controversial)
Serum B-hCG- 7 days, Upreg 3 days
Pulmonary disease
CBC, ECG, CXR
Renal disease
CBC, Cr, lytes, ECG
RA
CBC, ECG, CX
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3. Anesthetic drugs and techniques have profound effects
on human physiology. Hence, a focused review of all major
organ systems should be completed prior to surgery.
Goals of the preoperative evaluation is to ensure that the
patient is in the best (or optimal) condition.
Patients with unstable symptoms should be postponed
for optimization prior to elective surgery.
7. General & Local examination
Should focus on evaluation of :
• Upper airway
• Respiratory system
• Cardiovascular system
• other systems’ problems identified from the history
8.
9. Mallampati
Measurements 3-3-2-1 or 1-2-3-3 Patient ‘s fingers
Movement of the Neck
Malformations of the Skull
Teeth
Obstruction
Pathology
10. Class I = visualize the soft palate, fauces, uvula, anterior
and posterior pillars.
Class II = visualize the soft palate, fauces and uvula.
Class III = visualize the soft palate and the base
of the uvula.
Class IV = soft palate is not visible at all.
11. 3 Fingers Mouth Opening
3 Fingers Hypomental Distance. (3 Fingers between the tip
of the jaw and the beginning of the neck (under the chin)
2 Fingers between the thyroid notch and the floor of the
mandible (top of the neck)
1 Finger Lower Jaw Anterior sublaxation
12.
13. Skull (Hydro and Microcephalus)
Teeth (Buck, protruded, & loose teeth. Macro and Micro mandibles)
Obstruction (obesity, short Bull Neck & swellings around the head
and neck)
Pathology (Craniofacial abnormalities & Syndromes e.g. Treacher
Collins, Goldenhar's, Pierre Robin syndromes)
“Patients with an abnormal airway (including Class III or
IV airway) should be considered at higher risk “.
18. only if indicated from the preoperative history and physical examination.
"Routine or standing" pre operative tests should be discouraged
-CBC anticipated significant blood loss, suspected hematological
disorder (eg.anemia, thalassemia, SCD), or recent chemotherapy.
-Electrolytes diuretics, chemotherapy, renal or adrenal disorders
-ECG age >50 yrs ,history of cardiac disease, hypertension, peripheral
vascular disease, DM, renal, thyroid or metabolic disease.
-Chest X-rays prior cardiothoracic procedures ,COPD, asthma, a
change in respiratory symptoms in the past six months.
-Urine analysis DM, renal disease or recent UTI.
-tests for different systems according to history and examination
19. Components for evaluating perioperative risk:
• patient's medical condition preoperatively
• extent of the surgical procedure
• risk from the anesthetic
“Most of the work, however, addresses the operative risk
according to the patient's preoperative medical status”
20. medical status mortality
ASA I normal healthy patient without organic, biochemical,
or psychiatric disease
0.06-0.08%
ASA II mild systemic disease with no significant impact on
daily activity e.g. mild diabetes, controlled
hypertension, obesity .
Unlikely to have
an impact
0.27-0.4%
ASA III severe systemic disease that limits activity e.g. angina,
COPD, prior myocardial infarction
Probable impact
1.8-4.3%
ASA IV an incapacitating disease that is a constant threat to
life e.g. CHF, unstable angina, renal failure ,acute MI,
respiratory failure requiring mechanical ventilation
Major impact
7.8-23%
ASAV moribund patient not expected to survive 24 hours
e.g. ruptured aneurysm
9.4-51%
ASAVI brain-dead patient whose organs are being harvested
ASA Physical Status Classification System
For emergent operations, you have to add the letter ‘E’ after the classification.
21. • Anesthetic indications:
-Anxiolysis, sedation and amnesia. e.g. benzodiazepine(diazepam ,lorazepam)
-Analgesia e.g narcotics
-Drying of airway secretions e.g atropine,glycopyrrolate,scopolamine
-Reduction of anesthetic requirements ,Facilitation of smooth induction
-Patients at risk for GE reflux :ranitidine ,metoclopramide , sodium citrate
• Surgical indications:
-Antibiotic prophylaxis for infective endocarditis.
-Prophylaxis against DVT for high risk patients : low-dose heparin or aspirin
intermittent calf compression, or warfarin.
• Co-existing Disease indications:
Some medications should be continued on the day of surgery e,g B blockers,
thyroxine. Others are stopped e.g oral hypoglycemics and antidepressants .
Steroids within the last six months may require supplemental steroids
22. MEDICATION ADMINISTRATION ROUTE DOSE (mg)
Lorazepam Oral, IV 0.5–4
Midazolam IV Titration of 1.0–2.5-mg doses
Fentanyl IV Titration of 25–100–µg doses
Morphine IV Titration of 1.0–2.5-mg doses
Meperidine IV Titration of 10–25-mg doses
Cimetidine Oral, IV 150–300
Ranitidine Oral 50–200
Metoclopramide IV 5–10
Atropine IV 0.3–0.4
Glycopyrrolate IV 0.1–0.2
Scopolamine IV 0.1–0.4
23. INGESTED MATERIAL
MINIMUM FASTING PERIOD,
APPLIED TO ALL AGES (hr)
Clear liquids 2
Breast milk 4
Infant formula 6
Nonhuman milk 6
Light meal (toast and clear liquids) 6
24. 1. Is the patient's condition optimal?
2. Are there any problems which require consultation or special
tests? “Please assess and advise “
3. Is there an alternative procedure which may be more appropriate?
4. What are the plans for postoperative management of the patient?
5. What premedication if any is appropriate?
25. Finally, we plan our anesthetic technique :
1. Local or Regional anesthesia with 'standby‘ monitoring
with or without sedation.
2. General anesthesia; with or without intubation.
Spontaneous or controlled ventilation is used.
3. Combined regional with general anesthesia.