Depth of Anesthesia

David Hao, MD

Depth of Anesthesia is a podcast that critically explores dogmatic practices (we call them claims) in anesthesiology. Join us as we explore the literature around the latest clinical controversies!

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Top 10 Depth of Anesthesia Episodes

Goodpods has curated a list of the 10 best Depth of Anesthesia episodes, ranked by the number of listens and likes each episode have garnered from our listeners. If you are listening to Depth of Anesthesia for the first time, there's no better place to start than with one of these standout episodes. If you are a fan of the show, vote for your favorite Depth of Anesthesia episode by adding your comments to the episode page.

9: Is it safe to peripherally administer norepinephrine?

Depth of Anesthesia

10/11/19 • 45 min

We investigate the claim that norepinephrine is not safe for peripheral administration.

Our guests today are Dr. Katarina Ruscic and Dr. Jamie Sparling of the Critical Care Division of the Massachusetts General Hospital.

Full show notes available at depthofanesthesia.com.

Connect with us @DepthAnesthesia on Twitter or [email protected].

Thanks for listening! Please rate us on iTunes and share with your colleagues.

Music by Stephen Campbell, MD.

References

Cardenas‐Garcia J, Schaub KF, Belchikov YG, Narasimhan M, Koenig SJ, Mayo PH, Peripheral Administration of VM. J. Hosp. Med 2015;9;581-585. doi:10.1002/jhm.2394

Hasanin AM, Amin SA, Agiza NA, Elsayed MK, Refaa S, Hussein HA, Rouk TI, Alrahmany M. Elsayad M. Norepinephrine Infusion for Preventing Postspinal Anesthesia Hypotension during Cesarean Delivery Anesthesiology 2019; 130:55–62.

Medlej K, Kazzi AA, El Hajj Chehade A. Complications from Administration of Vasopressors Through Peripheral Venous Catheters: An Observational Study. The Journal of emergency medicine. 2018; 54(1):47-53.

Ngan Kee, WD A random-allocation graded dose-response study of norepinephrine and phenylephrine for treating hypotension during spinal anesthesia for cesarean delivery. Anesthesiology 2017; 127:934-41

Ngan Kee WD, Lee SWY, Ng FF, Khaw KS. Prophylactic norepinephrine infusion for preventing hypotension during spinal anesthesia for cesarean delivery. Anesth Analg. 2018;126:1989–1994.

Permpikul C, Tongyoo S, Viarasilpa T, Trainarongsakul T, Chakorn T, Udompanturak S. Early Use of Norepinephrine in Septic Shock Resuscitation (CENSER) : A Randomized Trial. Am J Respir Crit Care Med. 2019

Parienti JJ, Mongardon N, Mégarbane B. Intravascular Complications of Central Venous Catheterization by Insertion Site. The New England journal of medicine. 2015; 373(13):1220-9.

Ricard J, Salomon L, Boyer A, et al. Central or peripheral catheters for initial venous access of ICU patients. Crit Care Med 2013;41(9):2108-2115.

By listening to this podcast, you agree not to use information as medical advice to treat any medical condition in either yourself or others, including but not limited to patients that you are treating. Opinions expressed are solely those of the host and guests and do not express the views or opinions of Massachusetts General Hospital.

21: Should smaller endotracheal tubes be used for elective surgery?

Depth of Anesthesia

02/16/21 • 38 min

In this episode, we explore the evidence on whether smaller endotracheal tubes are...

1. Less likely to maintain a secure patent airway

2. Less reliable in facilitating positive pressure ventilation

3. Less able to seal the trachea and protect the lungs from aspiration

We also discuss the potential harms associated with larger endotracheal tubes.

Our guests are Dr. Shamir Karmali and Dr. Peter Rose from the Department of Anesthesiology at Vancouver General Hospital.

Thanks for listening! If you enjoy our content, consider donating to our Patreon at https://bit.ly/3n0sklh.

—

Email us at [email protected].

Music by Stephen Campbell, MD.

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References

Coordes A, Rademacher G, Knopke S, Todt I, Ernst A, Estel B, Seidl RO. Selection and placement of oral ventilation tubes based on tracheal morphometry. Laryngoscope. 2011 Jun;121(6):1225-30. doi: 10.1002/lary.21752. Epub 2011 May 6. PMID: 21557233.

Dominelli PB, Ripoll JG, Cross TJ, Baker SE, Wiggins CC, Welch BT, Joyner MJ. Sex differences in large conducting airway anatomy. J Appl Physiol (1985). 2018 Sep 1;125(3):960-965. doi: 10.1152/japplphysiol.00440.2018. Epub 2018 Jul 19. PMID: 30024341; PMCID: PMC6335094.

El-Boghdadly K, Bailey CR, Wiles MD. Postoperative sore throat: a systematic review. Anaesthesia. 2016 Jun;71(6):706-17. doi: 10.1111/anae.13438. Epub 2016 Mar 28. PMID: 27158989.

Ellis SF, Pollak AC, Hanson DG, Jiang JJ. Videolaryngoscopic evaluation of laryngeal intubation injury: incidence and predictive factors. Otolaryngol Head Neck Surg. 1996 Jun;114(6):729-31. doi: 10.1016/s0194-5998(96)70093-1. PMID: 8643294.

Fiastro JF, Habib MP, Quan SF. Pressure support compensation for inspiratory work due to endotracheal tubes and demand continuous positive airway pressure. Chest. 1988 Mar;93(3):499-505. doi: 10.1378/chest.93.3.499. PMID: 3277803.

Futagawa K, Takasugi Y, Kobayashi T, Morishita S, Okuda T. Role of tube size and intranasal compression of the nasotracheal tube in respiratory pressure loss during nasotracheal intubation: a laboratory study. BMC Anesthesiol. 2017 Oct 17;17(1):141. doi: 10.1186/s12871-017-0432-1. PMID: 29041911; PMCID: PMC5645985.

Hu B, Bao R, Wang X, Liu S, Tao T, Xie Q, Yu X, Li J, Bo L, Deng X. The size of endotracheal tube and sore throat after surgery: a systematic review and meta-analysis. PLoS One. 2013 Oct 4;8(10):e74467. doi: 10.1371/journal.pone.0074467. PMID: 24124452; PMCID: PMC3790787.

Hwang JY, Park SH, Han SH, Park SJ, Park SK, Kim JH. The effect of tracheal tube size on air leak around the cuffs. Korean J Anesthesiol. 2011 Jul;61(1):24-9. doi: 10.4097/kjae.2011.61.1.24. Epub 2011 Jul 21. PMID: 21860747; PMCID: PMC3155132.

Karmali S, Rose P. Tracheal tube size in adults undergoing elective surgery - a narrative review. Anaesthesia. 2020 Nov;75(11):1529-1539. doi: 10.1111/anae.15041. Epub 2020 May 16. PMID: 32415788.

Koh KF, Hare JD, Calder I. Small tubes revisited. Anaesthesia. 1998 Jan;53(1):46-50. doi: 10.1111/j.1365-2044.1998.00290.x. PMID: 9505742.

Pavlin EG, VanNimwegan D, Hornbein TF. Failure of a high-compliance low-pressure cuff to prevent aspiration. Anesthesiology. 1975 Feb;42(2):216-9. doi: 10.1097/00000542-197502000-00019. PMID: 1115375.

Randestad A, Lindholm CE, Fabian P. Dimensions of the cricoid cartilage and the trachea. Laryngoscope. 2000 Nov;110(11):1957-61. doi: 10.1097/00005537-200011000-00036. PMID: 11081618.

Shah C, Kollef MH. Endotracheal tube intraluminal volume loss among mechanically ventilated patients. Crit Care Med. 2004 Jan;32(1):120-5. doi: 10.1097/01.CCM.0000104205.96219.D6. PMID: 14707569.

Stenqvist O, Sonander H, Nilsson K. Small endotracheal tubes: ventilator and intratracheal pressures during controlled ventilation. Br J Anaesth. 1979 Apr;51(4):375-81. doi: 10.1093/bja/51.4.375. PMID: 465261.

Tanaka A, Isono S, Ishikawa T, Sato J, Nishino T. Laryngeal resistance before and after minor surgery: endotracheal tube versus Laryngeal Mask Airway. Anesthesiology. 2003 Aug;99(2):252-8. doi: 10.1097/00000542-200308000-00005. PMID: 12883396.

Tonnesen AS, Vereen L, Arens JF. Endotracheal tube cuff residual volume and lateral wall pressure in a model trachea. Anesthesiology. 1981 Dec;55(6):680-3. doi: 10.1097/00000542-198155060-00013. PMID: 7305056.

Walker EMK, Bell M, Cook TM, Grocott MPW, Moonesinghe SR; Central SNAP-1 Organisation; National Study Groups. Patient reported outcome of adult perioperative anaesthesia in the United Kingdom: a cross-sectional observational study. Br J Anaesth. 2016 Jun 12;117(6):758-766. doi: 10.1093/bja/aew381. Erratum in: Br J Anaesth. 2017 Sep 1;119(3):552. PMID: 27956674.

Wil...

33. Do perioperative gabapentinoids decrease postoperative pain?

Depth of Anesthesia

01/04/23 • 27 min

It's our first solo episode! We review the evidence around perioperative use of gabapentinoids (gabapentin and pregabalin) and discuss interesting concepts including trial sequential analysis and minimally important difference.

If you enjoy our content, leave a 5-star review on Apple Podcasts and share our content with your colleagues.

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Email us at [email protected] with episode ideas or if you’d like to join our team.

Music by Stephen Campbell, MD.

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References

Dirks J, Fredensborg BB, Christensen D, Fomsgaard JS, Flyger H, Dahl JB. A randomized study of the effects of single-dose gabapentin versus placebo on postoperative pain and morphine consumption after mastectomy. Anesthesiology. 2002 Sep;97(3):560-4. doi: 10.1097/00000542-200209000-00007. PMID: 12218520.

Ian Gilron; Is Gabapentin a “Broad-spectrum” Analgesic?. Anesthesiology 2002; 97:537–539 doi: https://doi.org/10.1097/00000542-200209000-00004

Mishriky BM, Waldron NH, Habib AS. Impact of pregabalin on acute and persistent postoperative pain: a systematic review and meta-analysis. Br J Anaesth. 2015 Jan;114(1):10-31. doi: 10.1093/bja/aeu293. Epub 2014 Sep 10. PMID: 25209095.Fabritius ML, Geisler A, Petersen PL, Nikolajsen L, Hansen MS, Kontinen V, Hamunen K, Dahl JB, Wetterslev J, Mathiesen O. Gabapentin for post-operative pain management - a systematic review with meta-analyses and trial sequential analyses. Acta Anaesthesiol Scand. 2016 Oct;60(9):1188-208. doi: 10.1111/aas.12766. Epub 2016 Jul 18. Erratum in: Acta Anaesthesiol Scand. 2017 Mar;61(3):357-359. PMID: 27426431.

Chan JSK, Harky A. Trial sequential analysis in meta-analyses: A clinically oriented approach with real-world example. J Thorac Cardiovasc Surg. 2021 Jul;162(1):167-173. doi: 10.1016/j.jtcvs.2020.06.063. Epub 2020 Jun 27. PMID: 32868066.

Clephas PRD, Kranke P, Heesen M. How to perform and write a trial sequential analysis. Anaesthesia. 2022 Jul 13. doi: 10.1111/anae.15811. Epub ahead of print. PMID: 35831946.

Michael Verret, François Lauzier, Ryan Zarychanski, Caroline Perron, Xavier Savard, Anne-Marie Pinard, Guillaume Leblanc, Marie-Joëlle Cossi, Xavier Neveu, Alexis F. Turgeon, the Canadian Perioperative Anesthesia Clinical Trials (PACT) Group; Perioperative Use of Gabapentinoids for the Management of Postoperative Acute Pain: A Systematic Review and Meta-analysis. Anesthesiology 2020; 133:265–279 doi: https://doi.org/10.1097/ALN.0000000000003428

Deljou A, Hedrick SJ, Portner ER, Schroeder DR, Hooten WM, Sprung J, Weingarten TN. Pattern of perioperative gabapentinoid use and risk for postoperative naloxone administration. Br J Anaesth. 2018 Apr;120(4):798-806. doi: 10.1016/j.bja.2017.11.113. Epub 2018 Feb 10. PMID: 29576120.

Kharasch ED, Clark JD, Kheterpal S. Perioperative Gabapentinoids: Deflating the Bubble. Anesthesiology. 2020 Aug;133(2):251-254. doi: 10.1097/ALN.0000000000003394. PMID: 32667153; PMCID: PMC7367437.

7: How do you reverse neuromuscular blockade? - Part 1 of 2

Depth of Anesthesia

08/19/19 • 30 min

We investigate claims about reversal of neuromuscular blockade.

Claim 1. Location of train-of-four assessment matters

Claim 2. Train-of-four is unnecessary with "sufficient" time from the last dose

Claim 3. Fade can be discriminated by tactile assessment

Our guest today is Dr. Daniel Saddawi-Konefka of the Massachusetts General Hospital.

Full show notes available at depthofanesthesia.com.

Connect with us @DepthAnesthesia on Twitter or [email protected].

Thanks for listening! Please rate us on iTunes and share with your colleagues.

Music by Stephen Campbell, MD.

References

Arain Sr, Kern S, Ficke DJ, Ebert TJ. Variability of duration of action of neuromuscular blocking drugs in elderly patients. Acta Anaesthesiol Scand. 2005;49:312–315.

Caldwell JE. Reversal of residual neuromuscular block with neostigmine at one to four hours after a single intubating dose of vecuronium. Anesth Analg 1995;80:1168 –74

JØRGEN VIBY-MOGENSEN, NIELS HENRIK JENSEN, JENS ENGBAEK, HELLE ØRDING, LENE THEIL SKOVGAARD, BENT CHRAEMMER-JØRGENSEN; Tactile and Visual Evaluation of the Response to Train-of-four Nerve Stimulation. Anesthesiology1985;63(4):440-442.

Stephan R. Thilen, Bradley E. Hansen, Ramesh Ramaiah, Christopher D. Kent, Miriam M. Treggiari, Sanjay M. Bhananker; Intraoperative Neuromuscular Monitoring Site and Residual Paralysis. Anesthesiology 2012;117(5):964-972. doi: 10.1097/ALN.0b013e31826f8fdd.

10: Is a subjective assessment of functional capacity predictive of perioperative complications?

Depth of Anesthesia

11/22/19 • 28 min

We investigate the claim that a subjective assessment is an accurate way to measure functional capacity.

We also explore whether self-reported ability to climb two flights of stairs is the best subjective method to assess functional capacity and whether exercise tolerance greater than or equal to 4 metabolic equivalents predicts the risk of perioperative complications in any major non-cardiac surgery.

Our guests today are Dr. Elisa Walsh and Dr. Laurie Shapiro of the Massachusetts General Hospital.

Full show notes available at depthofanesthesia.com.

Connect with us @DepthAnesthesia on Twitter or [email protected].

Thanks for listening! Please rate us on iTunes and share with your colleagues.

Music by Stephen Campbell, MD.

References

Wijeysundera et al. Assessment of functional capacity before major non-cardiac surgery: an international, prospective cohort study. Lancet. 2018; 391: p2631-2640.

Fleisher et al. 2014 ACC/AHA guideline on perioperative cardiovascular evaluation and management of patients undergoing noncardiac surgery: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines. Circulation. 2014; 130: e278-e333.

Hlatky et al. A brief self-administered questionnaire to determine functional capacity (the Duke Activity Status Index). Am J Cardiol. 1989 Sep 15;64(10):651-4.

Wang et al. Plasma natriuretic peptide levels and the risk of cardiovascular events and death. N Engl J Med. 2004;350(7):655.

Kistrop et al. N-terminal pro-brain natriuretic peptide, C-reactive protein, and urinary albumin levels as predictors of mortality and cardiovascular events in older adults. JAMA. 2005;293(13):1609.

Struthers et al. The potential to improve primary prevention in the future by using BNP/N-BNP as an indicator of silent ‘pancardiac’ target organ damage. European Heart Journal, Volume 28, Issue 14, July 2007, Pages 1678–1682

Carliner et al. Routine preoperative exercise testing patients undergoing major noncardiac surgery. Am J Cardiol 1985;56;51-58.

Sgura et al. Supine exercise capacity identifies patients at low risk for perioperative cardiovascular events and predicts long-term survival. Am J Medicin 2000; 108.

Kistorp et al. N-terminal pro-brain natriuretic peptide, C-reactive protein, and urinary albumin levels as predictors of mortality and cardiovascular events in older adults. JAMA. 2005;293(13):1609.

Reilly et al. Self-reported exercise tolerance and the risk of serious perioperative complications. Arch Intern Med. 1999 Oct 11;159(18):2185-92.

Melon et al. Validated questionnaire vs physicians' judgment to estimate preoperative exercise capacity. JAMA Intern Med. 2014 Sep;174(9):1507-8.

Weinstein et al. Comparison of Preoperative Assessment of Patient's Metabolic Equivalents (METs) Estimated from History versus Measured by Exercise Cardiac Stress Testing. Anesthesiol Res Pract. 2018; 2018: 5912726.

Ryding et al. Prognostic Value of Brain Natriuretic Peptide in Noncardiac Surgery: A Meta-analysis. Anesthesiology. 8 2009, Vol.111, 311-319.

Wright et al. Examining Risk: A Systematic Review of Perioperative Cardiac Risk Prediction Indices. Mayo Clin Proc. 2019.

Wiklund RA, Stein HD, Rosenbaum SH. Activities of daily living and cardiovascular complications following elective, noncardiac surgery. Yale J Biol Med 2001; 74: 75–87

Ainsworth BE, Haskell WL, Herrmann SD, Meckes N, Bassett Jr DR, Tudor-Locke C, Greer JL, Vezina J, Whitt- Glover MC, Leon AS. 2011 Compendium of Physical Activities: a second update of codes and MET values. Medicine and Science in Sports and Exercise, 2011;43(8):1575-1581.

8: Does ketorolac increase the risk of bleeding?

Depth of Anesthesia

09/20/19 • 35 min

We investigate the claim that administering ketorolac (Toradol) increases bleeding and should be avoided in surgeries for which there is concern for bleeding.

Claim 1. Administration of intraoperative ketorolac increases the bleeding time due to platelet inhibition

Claim 2. Increased bleeding time translates to higher rate of surgical bleeding

Claim 3. The magnitude of bleeding propensity attributable to ketorolac is clinically relevant

Our guest today is Dr. Jamie Sparling of the Critical Care Division of the Massachusetts General Hospital.

Full show notes available at depthofanesthesia.com.

Connect with us @DepthAnesthesia on Twitter or [email protected].

Thanks for listening! Please rate us on iTunes and share with your colleagues.

Music by Stephen Campbell, MD.

References

Bailey R, Sinha C, Burgess LP. Ketorolac tromethamine and hemorrhage in tonsillectomy: A prospective, randomized, double-blind study. Laryngoscope 1997;107:166–169.

Cassinelli EH, Dean CL, Garcia RM, Furey CG, Bohlman HH. Ketorolac use for postoperative pain management fol- lowing lumbar decompression surgery: A prospective, ran- domized, double-blinded, placebo-controlled trial. Spine (Phila Pa 1976) 2008;33:1313–1317.

Gobble RM, Hoang HL, Kachniarz B, Orgill DP. Ketorolac does not increase perioperative bleeding: a meta-analysis of randomized controlled trials. Plastic and Reconstructive Surgery 2014; 133(3): 741-755

Singer AJ, Mynster CJ, McMahon BJ. The effect of IM ketoro- lac tromethamine on bleeding time: A prospective, interven- tional, controlled study. Am J Emerg Med. 2003;21:441–443.

Strom BL, Berlin JA, Kinman JL, et al. Parenteral ketoro- lac and risk of gastrointestinal and operative site bleed- ing: A postmarketing surveillance study. JAMA 1996;275: 376–382.

24: Is low flow anesthesia with sevoflurane safe?

Depth of Anesthesia

04/27/21 • 25 min

In this episode, Dr. Ross Kennedy and Dr. Cas Woinarski join us to discuss the evidence on whether low-flow anesthesia with sevoflurane is safe. We discuss Compound A generation and nephrotoxicity.

This episode was made possible through production and research support from Davies Agyekum, MD, PhD.

Thanks for listening! If you enjoy our content, consider helping us offset the costs of production by donating through our Patreon at https://bit.ly/3n0sklh.

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Follow us on Instagram @DepthofAnesthesia and on Twitter @DepthAnesthesia for podcast updates and new literature updates.

Email us at [email protected].

Music by Stephen Campbell, MD.

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References

Ebert TJ, Frink EJ Jr, Kharasch ED. Absence of biochemical evidence for renal and hepatic dysfunction after 8 hours of 1.25 minimum alveolar concentration sevoflurane anesthesia in volunteers. Anesthesiology. 1998 Mar;88(3):601-10. doi: 10.1097/00000542-199803000-00008. PMID: 9523801.

Ebert TJ, Messana LD, Uhrich TD, Staacke TS. Absence of renal and hepatic toxicity after four hours of 1.25 minimum alveolar anesthetic concentration sevoflurane anesthesia in volunteers. Anesth Analg. 1998 Mar;86(3):662-7. doi: 10.1097/00000539-199803000-00042. PMID: 9495434.

Eger EI 2nd. Compound A: does it matter? Can J Anaesth. 2001 May;48(5):427-30. doi: 10.1007/BF03028302. PMID: 11394507.

Eger EI 2nd, Gong D, Koblin DD, Bowland T, Ionescu P, Laster MJ, Weiskopf RB. Dose-related biochemical markers of renal injury after sevoflurane versus desflurane anesthesia in volunteers. Anesth Analg. 1997 Nov;85(5):1154-63. doi: 10.1097/00000539-199711000-00036. PMID: 9356118.

Eger EI 2nd, Koblin DD, Bowland T, Ionescu P, Laster MJ, Fang Z, Gong D, Sonner J, Weiskopf RB. Nephrotoxicity of sevoflurane versus desflurane anesthesia in volunteers. Anesth Analg. 1997 Jan;84(1):160-8. doi: 10.1097/00000539-199701000-00029. PMID: 8989018.

Feldman JM, Hendrickx J, Kennedy RR. Carbon Dioxide Absorption During Inhalation Anesthesia: A Modern Practice. Anesth Analg. 2021 Apr 1;132(4):993-1002. doi: 10.1213/ANE.0000000000005137. PMID: 32947290.

Fukuda H, Kawamoto M, Yuge O, Fujii K. A comparison of the effects of prolonged (>10 hour) low-flow sevoflurane, high-flow sevoflurane, and low-flow isoflurane anaesthesia on hepatorenal function in orthopaedic patients. Anaesth Intensive Care. 2004 Apr;32(2):210-8. doi: 10.1177/0310057X0403200208. PMID: 15957718.

Keijzer C, Perez RS, de Lange JJ. Compound A and carbon monoxide production from sevoflurane and seven different types of carbon dioxide absorbent in a patient model. Acta Anaesthesiol Scand. 2007 Jan;51(1):31-7. doi: 10.1111/j.1399-6576.2006.01187.x. Epub 2006 Nov 10. PMID: 17096668.

Kennedy RR, Hendrickx JF, Feldman JM. There are no dragons: Low-flow anaesthesia with sevoflurane is safe. Anaesth Intensive Care. 2019 May;47(3):223-225. doi: 10.1177/0310057X19843304. Epub 2019 May 24. PMID: 31124374.

Kharasch ED, Frink EJ Jr, Artru A, Michalowski P, Rooke GA, Nogami W. Long-duration low-flow sevoflurane and isoflurane effects on postoperative renal and hepatic function. Anesth Analg. 2001 Dec;93(6):1511-20, table of contents. doi: 10.1097/00000539-200112000-00036. PMID: 11726433.

Mazze RI, Jamison RL. Low-flow (1 l/min) sevoflurane: is it safe? Anesthesiology. 1997 Jun;86(6):1225-7. doi: 10.1097/00000542-199706000-00001. PMID: 9197289.

McGain F, Bishop JR, Elliot-Jones LM, Story DA, Imberger GL. A survey of the choice of general anaesthetic agents in Australia and New Zealand. Anaesth Intensive Care. 2019 May;47(3):235-241. doi: 10.1177/0310057X19836104. Epub 2019 May 15. PMID: 31088129.

35. Does spinal anesthesia decrease the risk of postoperative delirium?

Depth of Anesthesia

07/30/23 • 58 min

Dr. Mark Neuman and Dr. Sam Falkson join the show to discuss the literature around risks of regional versus general anesthesia for postoperative delirium. Dr. Neuman is the founding Director of the Center for Perioperative Outcomes Research and Transformation and Professor of Anesthesiology at Penn Medicine. Dr. Sam Falkson is an anesthesia resident at the Massachusetts General Hospital.

This podcast was recorded as part of the Depth of Anesthesia podcast elective.

Thanks for listening! If you enjoy our content, leave a 5-star review on Apple Podcasts and share our content with your colleagues.

—

Email us at [email protected] with episode ideas or if you'd like to join our team.

Music by Stephen Campbell, MD.

—

References

Guay J, Parker MJ, Gajendragadkar PR, Kopp S. Anaesthesia for hip fracture surgery in adults. Cochrane Database Syst Rev. 2016;2(2):CD000521.

Ravi B, Pincus D, Choi S, Jenkinson R, Wasserstein DN, Redelmeier DA. Association of duration of surgery with postoperative delirium among patients receiving hip fracture repair. JAMA Netw Open. 2019;2(2):e190111.

Patel V, Champaneria R, Dretzke J, Yeung J. Effect of regional versus general anaesthesia on postoperative delirium in elderly patients undergoing surgery for hip fracture: a systematic review. BMJ Open. 2018;8(12):e020757.

Zheng X, Tan Y, Gao Y, Liu Z. Comparative efficacy of Neuraxial and general anesthesia for hip fracture surgery: a meta-analysis of randomized clinical trials. BMC Anesthesiol. 2020 Jun 30;20(1):162.

Neuman MD, Feng R, Carson JL, et al. Spinal anesthesia or general anesthesia for hip surgery in older adults. N Engl J Med. 2021;385(22):2025-2035.

Rathmell JP, Avidan MS. Patient-centered outcomes after general and spinal anesthesia. N Engl J Med. 2021 Nov 25;385(22):2088–9.

Stone AB, Poeran J, Memtsoudis SG. There remains a role for neuraxial anesthesia for hip fracture surgery in the post-REGAIN era. Reg Anesth Pain Med. 2023 Aug;48(8):430-432. doi: 10.1136/rapm-2022-104071. Epub 2023 Mar 28. PMID: 36977527.

Li T, Li J, Yuan L, et al. Effect of regional vs general anesthesia on incidence of postoperative delirium in older patients undergoing hip fracture surgery: the raga randomized trial. JAMA. 2022;327(1):50-58.

17: Is it important to reverse to a train-of-four target of 90%? - Part 2 of 2

Depth of Anesthesia

09/09/20 • 41 min

In this part II or II series on neuromuscular blockade, we investigate the claim that a train-of-four target of 90% is important to achieve prior to extubation.

Our guest today is Dr. Daniel Saddawi-Konefka, residency program director at Mass General.

Connect with us @DepthAnesthesia on Twitter or email us at [email protected].

Thanks for listening! Please rate us on iTunes and share with your colleagues.

Music by Stephen Campbell, MD.

References

Naguib M, Kopman AF, Lien CA, Hunter JM, Lopez A, Brull SJ. A survey of current management of neuromuscular block in the United States and Europe. Anesth Analg. 2010;111(1):110-119. doi:10.1213/ANE.0b013e3181c07428

Ali HH, Kitz RJ. Evaluation of recovery from nondepolarizing neuromuscular block, using a digital neuromuscular transmission analyzer: preliminary report. Anesth Analg. 1973;52(5):740-745.

Ali HH, Wilson RS, Savarese JJ, Kitz RJ. The effect of tubocurarine on indirectly elicited train-of-four muscle response and respiratory measurements in humans. Br J Anaesth. 1975;47(5):570-574. doi:10.1093/bja/47.5.570

Sundman E, Witt H, Olsson R, Ekberg O, Kuylenstierna R, Eriksson LI. The incidence and mechanisms of pharyngeal and upper esophageal dysfunction in partially paralyzed humans: pharyngeal videoradiography and simultaneous manometry after atracurium. Anesthesiology. 2000;92(4):977-984. doi:10.1097/00000542-200004000-00014

Eikermann M, Groeben H, Hüsing J, Peters J. Accelerometry of adductor pollicis muscle predicts recovery of respiratory function from neuromuscular blockade. Anesthesiology. 2003;98(6):1333-1337. doi:10.1097/00000542-200306000-00006

Gopalaiah Venkatesh Kumar, Anita Pramod Nair, Hanuman Srinivasa Murthy, Koppa Ramegowda Jalaja, Karnate Ramachandra, Gundappa Parameshwara; Residual Neuromuscular Blockade Affects Postoperative Pulmonary Function. Anesthesiology 2012; 117:1234–1244 doi: https://doi.org/10.1097/ALN.0b013e3182715b80

Eriksson LI, Lennmarken C, Wyon N, Johnson A. Attenuated ventilatory response to hypoxaemia at vecuronium-induced partial neuromuscular block. Acta Anaesthesiol Scand. 1992;36(7):710-715. doi:10.1111/j.1399-6576.1992.tb03550.x

Suzanne J. L. Broens, Martijn Boon, Chris H. Martini, Marieke Niesters, Monique van Velzen, Leon P. H. J. Aarts, Albert Dahan; Reversal of Partial Neuromuscular Block and the Ventilatory Response to Hypoxia: A Randomized Controlled Trial in Healthy Volunteers. Anesthesiology 2019; 131:467–476 doi: https://doi.org/10.1097/ALN.0000000000002711

Kopman AF, Yee PS, Neuman GG. Relationship of the train-of-four fade ratio to clinical signs and symptoms of residual paralysis in awake volunteers. Anesthesiology. 1997;86(4):765-771. doi:10.1097/00000542-199704000-00005

Glenn S. Murphy, Joseph W. Szokol, Jesse H. Marymont, Steven B. Greenberg, Michael J. Avram, Jeffery S. Vender, Margarita Nisman; Intraoperative Acceleromyographic Monitoring Reduces the Risk of Residual Meeting Abstracts and Adverse Respiratory Events in the Postanesthesia Care Unit. Anesthesiology 2008; 109:389–398 doi: https://doi.org/10.1097/ALN.0b013e318182af3b

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Section Editor(s): Brull, Sorin J.Murphy, Glenn S. MD; Szokol, Joseph W. MD; Marymont, Jesse H. MD; Greenberg, Steven B. MD; Avram, Michael J. PhD; Vender, Jeffery S. MD Residual Neuromuscular Blockade and Critical Respiratory Events in the Postanesthesia Care Unit, Anesthesia & Analgesia: July 2008 - Volume 107 - Issue 1 - p 130-137 doi: 10.1213/ane.0b013e31816d1268

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15: Is dural puncture epidural (DPE) the optimal labor analgesia technique?

Depth of Anesthesia

07/03/20 • 26 min

In this episode, we investigate the following claims related to DPE:

1. Dural puncture epidural (DPE) technique improves analgesic quality versus traditional epidural

2. DPE technique has faster onset of analgesia versus traditional epidural

3. DPE has less adverse effects compared with combined spinal-epidural (CSE)

Our guest today is Dr. Ronald George (@Ron_George), Professor and Chief of Obstetric Anesthesia at UCSF.

Connect with us @DepthAnesthesia on Twitter or email us at [email protected]

Thanks for listening! Please rate us on iTunes and share with your colleagues.

Music by Stephen Campbell, MD.

References

Heesen M, Rijs K, Rossaint R, Klimek M. Dural puncture epidural versus conventional epidural block for labor analgesia: a systematic review of randomized controlled trials. Int J Obstet Anesth. 2019;40:24-31. doi:10.1016/j.ijoa.2019.05.007

Thomas JA, Pan PH, Harris LC, Owen MD, D'Angelo R. Dural puncture with a 27-gauge Whitacre needle as part of a combined spinal-epidural technique does not improve labor epidural catheter function. Anesthesiology. 2005;103(5):1046-1051. doi:10.1097/00000542-200511000-00019

Wilson SH, Wolf BJ, Bingham K, et al. Labor Analgesia Onset With Dural Puncture Epidural Versus Traditional Epidural Using a 26-Gauge Whitacre Needle and 0.125% Bupivacaine Bolus: A Randomized Clinical Trial. Anesth Analg. 2018;126(2):545-551. doi:10.1213/ANE.0000000000002129

Cappiello E, O'Rourke N, Segal S, Tsen LC. A randomized trial of dural puncture epidural technique compared with the standard epidural technique for labor analgesia. Anesth Analg. 2008;107(5):1646-1651. doi:10.1213/ane.0b013e318184ec14

Chau A, Bibbo C, Huang CC, et al. Dural Puncture Epidural Technique Improves Labor Analgesia Quality With Fewer Side Effects Compared With Epidural and Combined Spinal Epidural Techniques: A Randomized Clinical Trial. Anesth Analg. 2017;124(2):560-569. doi:10.1213/ANE.0000000000001798

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Depth of Anesthesia

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