Anesthesia and Critical Care Reviews and Commentary (ACCRAC) Podcast
Episode 193: Keywords Part 15: Pharmacology of Inhaled Anesthetics
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In this 193rd episode I welcome Dr. Gillian Isaac back to the show to discuss another ABA Key Word topic. This time we discuss the pharmacology of inhaled anesthetic agents.
Anesthesia and Critical Care Reviews and Commentary (ACCRAC) Podcast
Episode 189: Timing of Surgery After Recovery From COVID-19 with Jason Chi
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In this 189th episode I welcome Dr. Jason Chi to the show to discuss what we know about how to plan for surgery in patients who have recovered from COVID-19.
Anesthesia and Critical Care Reviews and Commentary (ACCRAC) Podcast
Episode 183: Keywords Part 13 with Gillian Isaac: Thyroid for the Basic and Advanced Exams
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In this 183rd episode I welcome back Dr. Gillian Isaac to do another keyword episode where we review the ABA keyword topics of Thyroid for the Basic Exam and Thyroid for the Advanced Exam.
Anesthesia and Critical Care Reviews and Commentary (ACCRAC) Podcast
Episode 176: Keywords Part 11: Barbiturates and Bier Blocks
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In this 176th episode I welcome Dr. Gillian Isaac back to the show to discuss another 2 ABA key words. This time we discuss Barbiturates and Bier Blocks. I also take a moment up front to share some thoughts on the horrible tragedy of George Floyd’s death at the hands of the police and the importance of acknowledging white privilege and fighting for the fact that Black Lives Matter.
CME: https://earnc.me/ucUI9n
Reference: Clinical Anesthesia. Publication Year: 2017. Edition: 8th Ed. Authors/Editor: Barash, Paul G.; Cullen, Bruce F.; Stoelting, Robert K.; Cahalan, Michael K.; et al. Outline by Brian Park, MD
Awakening after a single dose of thiopental is caused by redistribution from the brain primarily to which of the following sites? (A) Fat (B) Heart (C) Liver (D) Lung
Anesthesia and Critical Care Reviews and Commentary (ACCRAC) Podcast
Episode 174: Keywords Part 10: OR Fires and Electrical Safety
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In this 174th episode I welcome back Dr. Gillian Isaac to discuss another 2 highly tested ABA keywords, OR fires and electrical safety in the OR.
CME: https://earnc.me/Adkacw
OR Fires
Fire Triangle (2:52) Most important aspect of OR fire management? (3:22)
Risk for airway fire during laser resection of tracheal tumor DECREASED in A. CO2 rather than GAD laser B. Helium > 60% C. N2O > 60% D. PVC ETT E. Halothane in mixture
Anesthesia and Critical Care Reviews and Commentary (ACCRAC) Podcast
Episode 164: Keywords part 9: Fentanyl and Breathing Circuits
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In this 164th episode I welcome back Dr. Gillian Isaac to do another ABA keywords episode. We discuss fentanyl and breathing systems (Mapleson and Circle systems).
It is actually the case that follow up studies were done in the US on volunteer patients through University of Arizona and Medical College of Wisconsin in the later 1990’s.Ebert, T., Frink, E. and Kharasch, E. Absence of Biochemical Evidence for Renal and Hepatic Dysfunction after 8 Hours of 1.25 Minimum Alveolar Concentration Sevoflurane Anesthesia in Volunteers. Anesthesiology. 1998;88(3):601-610.
Kharasch, E. and Jubert, C. Compound A Uptake and Metabolism to Mercapturic Acids and 3,3,3-Trifluoro-2-fluoromethoxypropanoic Acid during Low-flow Sevoflurane Anesthesia.
The key point of the final article concludes that humans are nearly devoid of renal beta lyase, the key enzyme in directing biodegradation of compound A to the toxic renal thiol. Essentially, this research was done in the late 90’s but the original possibility of renal toxicity in humans from just a few years prior has stuck in peoples’ minds (and therefore textbooks).
During our discussion of treatment of eclamptic seizures Dr. Henao said benzos were first line treatment. This is assuming the patient is already getting magnesium. For test questions, the answer for first line treatment should be Mg. In reality, patients will likely get both at the same time.
Serum Mg concentrations can be reported as mmol/L, meq/L or mg/dL. The important ranges to know for testing (though in reality different people may get symptoms at different times) are a therapeutic range of 2-3.5 mmol/L or 4-7 mEq/L or 5-9 mg/dL; A loss of patellar reflexes at >3.5, >7, >9; Respiratory paralysis at >5, >10, >12 and cardiac arrest at >12.5, >25, >30. EKG changes including prolonged PR and widened QRS happen in much the same range as loss of patellar reflexes, maybe a bit before but there is a lot of overlap.
References:
Hofmeyr R, Matjila M, Dyer R. Preeclampsia in 2017: Obstetric and Anaesthesia Management. Best Pract Res Clin Anaesthesiol. 2017 Mar;31(1):125-138.
Dhariwal NK, Lynde GC. Update in the Management of Patients with Preeclampsia. Anesthesiol Clin. 2017 Mar;35(1):95-106.
Aya AG, Mangin R, Vialles N, Ferrer JM, Robert C, Ripart J, de La Coussaye JE. Patients with severe preeclampsia experience less hypotension during spinal anesthesia for elective cesarean delivery than healthy parturients: a prospective cohort comparison. Anesth Analg. 2003 Sep;97(3):867-72.
Roberge S, Nicolaides K, Demers S, Hyett J, Chaillet N, Bujold E. The role of aspirin dose on the prevention of preeclampsia and fetal growth restriction: systematic review and meta-analysis. Am J Obstet Gynecol. 2017 Feb;216(2):110-120.
David Chestnut Cynthia Wong Lawrence Tsen Warwick D Ngan Kee Yaakov BeilinJill Mhyre Brian T. Bateman Naveen Nathan. Chestnut’s Obstetric Anesthesia: Principles and Practice. 5th edition. Chapter 36: Hypertensive Disorders. Pg 825-859
Killers of the Flower Moon (Dr. Henao’s random recommendation): https://www.amazon.com/Killers-Flower-Moon-Osage-Murders/dp/0385534248
1. Practice Guidelines for Obstetric Anesthesia: An Updated Report by the American Society of Anesthesiologists Task Force on Obstetric Anesthesia and the Society for Obstetric Anesthesia and Perinatology. Anesthesiology 2016;124(2):270–300.
2. Nonobstetric Surgery During Pregnancy – ACOG [Internet]. [cited 2019 Jul 18];Available from: https://www.acog.org/Clinical-Guidance-and-Publications/Committee-Opinions/Committee-on-Obstetric-Practice/Nonobstetric-Surgery-During-Pregnancy?IsMobileSet=false
3. Tolcher MC, Fisher WE, Clark SL. Nonobstetric Surgery During Pregnancy. ObstetGynecol 2018;132(2):395–403.
5. Upadya M, Saneesh PJ. Anaesthesia for non-obstetric surgery during pregnancy. Indian J Anaesth 2016;60(4):234–41.
6. Reitman E, Flood P. Anaesthetic considerations for non-obstetric surgery duringpregnancy. Br J Anaesth 2011;107 Suppl 1:i72–8.
7. Nejdlova M, Johnson T. Anaesthesia for non-obstetric procedures during pregnancy. Contin Educ Anaesth Crit Care Pain 2012;12(4):203–6.
8. Mazze RI, Källén B. Reproductive outcome after anesthesia and operation during pregnancy: a registry study of 5405 cases. Am J Obstet Gynecol 1989;161(5):1178–85.
9. Committee on Obstetric Practice and the American Society of Anesthesiologists. Committee Opinion No. 696: Nonobstetric Surgery During Pregnancy. Obstet Gynecol 2017;129(4):777–8.
10. Wilcox AJ, Weinberg CR, O’Connor JF, et al. Incidence of early loss of pregnancy. N Engl J Med 1988;319(4):189–94.
11. Davidson AJ, Disma N, de Graaff JC, et al. Neurodevelopmental outcome at 2 years of age after general anaesthesia and awake-regional anaesthesia in infancy (GAS): an international multicentre, randomised controlled trial. Lancet 2016;387(10015):239–50.
12. Sun LS, Li G, Miller TLK, et al. Association Between a Single General Anesthesia Exposure Before Age 36 Months and Neurocognitive Outcomes in Later Childhood. JAMA 2016;315(21):2312–20.
14. Huang S-Y, Lo P-H, Liu W-M, et al. Outcomes After Nonobstetric Surgery in Pregnant Patients: A Nationwide Study. Mayo Clin Proc 2016;91(9):1166–72.
Anesthesia and Critical Care Reviews and Commentary (ACCRAC) Podcast
Episode 159: Postpartum hemorrhage with Juanita Henao
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In this 159th episode I welcome Dr. Juanita Henao to the show to discuss prevention and management of postpartum hemorrhage.
One CORRECTION: At about minute 4:30 Dr. Henao states that in women with PPH the mortality rate is 10% but what she meant to say is that PPH accounts for 10% of maternal deaths in the United States.
Thorneloe, J.C.A. Carvalho, K. Downey,M. Balki. Uterotonic drug usage in Canada: a snapshot of the practice in obstetric units of university-affiliated hospitals. Int J Obstet Anesth. 2019 Feb;37:45-51.
Hian Yan Voon , Haris Njoo Suharjono , Asrul Akmal Shafie , Mohamad Adam Bujang Carbetocin versus oxytocin for the prevention of postpartum hemorrhage: A meta-analysis of randomized controlled trials in cesarean deliveries. Taiwan J Obstet Gynecol. 2018 Jun;57(3):332-339.
WOMAN trial collaborators. Effect of early tranexamic acid administration on mortality, hysterectomy, and other morbidities in women with post-partum haemorrhage (WOMAN): an international, randomised, double-blind, placebo-controlled trial. Lancet. 2017 May 27;389(10084):2105-2116.
David H. Chestnut, Cynthia A Wong, Lawrence C Tsen, Warwick D Ngan Kee, Yaakov Beilin, Jill Mhyre. Chestnut’s Obstetric Anesthesia: Principles and Practice. Fifth edition. Chapter 38, Anterpartum and Postpartum, Hemorrhage.
Anesthesia and Critical Care Reviews and Commentary