Transversus Abdominis Plane (TAP) block

Indications and Technique

Figure 1. Biomed Res Int. 2017; 2017: 8284363.
Figure 1. Anesthesiol Res Pract. 2012; 2012: 731645.
Figure 5. Anesthesiol Res Pract. 2012; 2012: 731645.
Figure 6. Biomed Res Int. 2017; 2017: 8284363.

Pros & Cons

The Effect of Transversus Abdominis Plane Blocks on Postoperative Pain in Laparoscopic Colorectal Surgery: A Prospective, Randomized, Double-Blind Trial. Diseases of the Colon & Rectum: November 2014 – Volume 57 – Issue 11 – p 1290-1297


How to perform a TAP block?

YouTube: U/S guided TAP block

YouTube: RAUKvideos U/S guided TAP block Fast forward to 0:39

YouTube: 3D How-To U/S Guided TAP block Fast forward to 1:00

YouTube: 2012 ISURA TAP block lecture Fast forward to 16:55 for summary.

YouTube: ASRA Society Fast forward to 0:55. Sound off.

YouTube: Pajunk TAP block


Current mix:

  • July 2020
    • 0.25% bupi + epi + 1 mcg/kg dexmedetomidine (roughly 30 ml per side)

Cardiac myxoma

Myxoma is the most common primary benign cardiac tumor, which could lead to some fatal complications because of its strategic position. Although any age can be affected, it predominates in the age group of 30-60 years of age with more than 75% of the affected being women. The occurrence of myxomas in left and right atrium are 75% and 20% respectively.The majority of myxomas present with systemic emboli, fever and/or weight loss, or intracardiac obstruction to blood flow.1 A ‘tumor plop’ is a sound that typically occurs during early diastole and is believed to be caused by motion of the tumor striking the wall of the endocardium. The treatment is surgical excision and key aims of anesthesia care include constant monitoring of systemic blood pressure, adequate IV fluids, and judicious use of vasoactive medications to prevent a fall in systemic vascular resistance.3

From Anesthesiology 7 2019, Vol.131, 151-152.

Preop

  • A-line/CVP
  • Assess patient symptomatology: SOB, chest pain, changes in pulse pressure/CVP with positioning, heart sounds
  • Adequate PIV access
  • Vasopressors to help with SVR and heart rate control – mass can act as stenotic valve

Intraop

  • Induction: maintain SVR and consider slowing heart rate if mass blocking valves

Postop

2D TEE: X-plane
2D TEE: color flow through mitral valve
2D TEE: LA myxoma
2D TEE: LA myxoma w color
3D TEE: LA myxoma
From OpenAnaesthesia
2D TEE: measurement of stalk
Resected myxoma

References:

Surgical approach

Cardiac myxomas: 24 years of experience in 49 patients. European Journal of Cardio-thoracic Surgery 22 (2002) 971–977.

Anesthesia management

Hemodynamic management of a patient with a huge right atrium myxoma during thoracic vertebral surgery: A case report. Medicine (Baltimore). 2018 Sep; 97(39): e12543.

Anesthetic Management of a Patient With a Giant Right Atrial Myxoma. Semin Cardiothorac Vasc Anesth. 2016 Mar;20(1):104-9.

Anesthetic management of a patient with asymptomatic atrial myxoma for hernia repair. Anaesth Pain & Intensive Care 2016;20(2):246-248

Giant Left Atrial Myxoma Obstructing Mitral Valve Bloodflow. Anesthesiology 7 2019, Vol.131, 151-152.

Anesthetic Management of a Voluminous Left Atrial Myxoma Resection in a 19 Weeks Pregnant with Atypical Clinical Presentation. Case Reports in Anesthesiology, Volume 2019, Article ID 4181502, 6 pages.

Large myxoma causing cardiac arrest during surgery. A Clinical Reports volume 1, Article number: 24 (2015).

Atrial myxomas causing severe left and right ventricular dysfunction. Annals of Cardiac Anaesthesia. Case Report: Year : 2017  |  Volume : 20  |  Issue : 4  |  Page : 450-452.

Intraoperative Diagnosis of Left Atrial Myxoma. Anesthesia & Analgesia: January 1995 – Volume 80 – Issue 1 – p 183-184

Anesthetic experiences of myxoma removal surgery in two patients with Carney complex -A report of two cases-. Korean J Anesthesiol. 2011 Dec; 61(6): 528–532.

Echocardiography

Virtual TEE: Cardiac Myxoma

Intraoperative transesophageal echocardiography assessment of right atrial myxoma resulting in a change of the surgical plan. Ann Card Anaesth 2014;17:306-8.

Tracking Covid-19

Covid Symptom Study from MGH

Covid-19 Self-checker from Johns Hopkins

CDC Covid-19 symptoms


San Diego Union-Tribune: SD County

SanDiegoCounty.gov:

*** California Governor Update with Closures/Openings ***

Johns Hopkins COVID19 Map

NYT Coronavirus map

Humanistic GIS lab map

CDC Covid19 map

Worldometers Map

Avi Schiffman coronavirus tracker map and his Peaceful Protest Locator


Photo credit: RB.

Methadone: perioperative pain use

Methadone for perioperative pain #methadone #pain #ERAS

There’s a lot of great data that methadone use decreases postoperative narcotics use in cardiac surgery patients, and I believe it would really be a beneficial drug in an ERAS pathway for early extubation, decreased LOS in ICU and hospital, and better patient satisfaction.  Please see the articles below/attached for references.

Methadone for cardiac surgery: 0.2-0.3 mg/kg prior to incision – perhaps different metabolism on CPB so consider split dosing pre-pump and post-pump. Dose adjustment with age and other co-morbidities. At induction, one half of the study opioid (either 0.15 mg/kg of methadone or 6 μg/kg of fentanyl) was administered via an infusion pump over 5 min. The remainder of the study opioid (0.15 mg/kg of methadone or 6 μg/kg of fentanyl) was infused over the next 2 h. Either 0.3 mg/kg of methadone (maximum dose of 30 mg) or 12 μg/kg of fentanyl (maximum dose of 1200 μg) was added to 100-ml bags of normal saline (total volume 100 ml).

Methadone for non-cardiac surgery: 0.2mg/kg prior to incision. REVIEW: Intraoperative Methadone in Surgical Patients: A Review of Clinical Investigations. Anesthesiology 9 2019, Vol.131, 678-692.

Methadone for obesity: 0.15 mg/kg IBW+20% at induction. J Pain Res. 2018; 11: 2123–2129. Intraoperative use of methadone improves control of postoperative pain in morbidly obese patients: a randomized controlled study.

Methadone f0r outpatient surgery: 0.15 mg/kg ideal body weight. Anesth Analg. 2019 Apr; 128(4): 802–810. Intraoperative Methadone in Same-Day Ambulatory Surgery: A Randomized, Double-Blinded, Dose-Finding Pilot Study.

OVERALL: A variety of doses have been used in clinical trials, ranging from 0.1 to 0.3 mg/kg, with the majority of studies using a dose of either 0.2 mg/kg or a fixed dose of 20 mg.

Methadone has a long elimination half-life (1–2 days). It is cleared predominantly by hepatic metabolism, primarily via N-demethylation to 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine (EDDP), which is pharmacologically inactive, and thence secondarily to 2-ethyl-5-methyl-3,3-diphenylpyrroline (EMDP).

Together these investigations established that a) CYP3A has no influence on single-dose intravenous or oral methadone plasma concentrations, b) CYP3A plays a minimal (if any) role clinically in single-dose methadone N-demethylation and clearance, c) methadone is not a clinical CYP3A substrate, and d) clinical guidelines stating that methadone is a CYP3A4 substrate and warning about CYP3A4 drug interactions needed revision. In addition, CYPs 2C9, 2C19, and 2D6 do not appear to contribute materially to clinical methadone N-demethylation and clearance.

In summary, it is now obvious that CYP2B6 a) is a predominant catalyst of methadone metabolism in vitro; b) mediates clinical methadone metabolism, clearance, stereoselective disposition, and drug-drug interactions; and c) genetic polymorphisms influence methadone disposition. Thus, both constitutive variability due to CYP2B6 genetics, and CYP2B6-mediated drug interactions, can alter methadone disposition, clinical effect, and drug safety. Rewritten clinical guidelines stating that methadone is a CYP2B6 substrate and warning about CYP2B6 drug interactions may improve methadone use, treatment of pain and substance abuse, and patient safety.

FDA Drug Datasheet

From Anesthesiology 5 2015, Vol.122, 1112-1122.
From Anesth Analg. 2019 Apr; 128(4): 802–810.

Adult Cardiothoracic

Adult Non-Cardiac

Adult Outpatient

Pediatric Surgery

Methadone Pharmacology & Effects

From Anesthesiology 9 2019, Vol.131, 678-692. Relationship between methadone dose and duration of effect.

Updated July 2020

Prescription of Controlled Substances: Benefits and Risks. [Updated 2020 Jun 27]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2020 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK537318/

The role of methadone in opioid rotation-a Polish experience. Support Care Cancer. 2009 May;17(5):607-12.

Protecting patient safety

Check out @ASAGrassroots’s Tweet: https://twitter.com/ASAGrassroots/status/981951115062337536?s=09

#NewYork budget excluded provision that would have undermined physician-led anesthesia care, opposed by @ASALifeline & @NYSSApga. #THANKYOU to New York lawmakers for protecting patient safety. #SafeAnesthesia4NY
https://t.co/3M5wQm0TK8

Responsibility for your own health

I was shocked to see that the NHS could ban surgery for the obese and smokers.  That’s socialized medicine.  You take a conglomerate group of people (the UK) on a limited budget for healthcare… and basically find the cheapest most cost-effective way to deliver healthcare.  But in a way, it’s empowering patients to take responsibility for their own health.  Smoking, for sure — I agree 100% that surgery should be banned for this population.  Obesity is a bit trickier — there’s genetics and environmental factors at play in this one.  I don’t think anyone chooses to be obese.  But, people do have the power to change their eating and exercise habits.  Despite these efforts, there are some people who are still obese…. and these people should not be faulted.

Why single out the obese and smokers?

obesity-and-cv-disease-1ppt-44-728
From SlideShare

obesity-and-cv-disease-1ppt-43-728
From SlideShare

tobacco-health-statistics
From TobaccoFreeLife.org

Smokers and the obese have elevated surgical risk and mortality, which means more cost to treat and hospitalize and provide ongoing care.

150423sambydisease
From HealthStats

I think the NHS is on to something here.  They’re opening doors to moving the liability and responsibility away from physicians and towards patients.  This is a plus.  Outsiders may see it as separatism and elitist to only provide care for people who are healthy.  But look at the facts and the data…. obesity has a lot of co-morbidities associated.  Smoking has a lot of co-morbidities associated as well.  Why should physicians be penalized for re-admissions, poor wound healing, longer hospitalizations when the underlying conditions themselves are already challenging enough?  In fact, I would urge insurance companies to provide incentives to patients/the insured with discounted rates for good and maintained health and wellness.  With all the technologies, medications, and information out there, it’s time patients take responsibility for their own health.  I take responsibility for mine — watching my diet, exercising, working on getting enough rest, maintaining activities to keep my mind and body engaged, meditating for rest and relaxation.  It’s not easy, but my health is 100% my responsibility.  I refuse to pass the buck to my husband, my family, my physician, etc.  I do what I can to optimize my health and future — and if that doesn’t work… I call for backup.

Patients need to change their mindset re: health.  It is not your spouse’s responsibility to track your meds.  It is your responsibility to know your medical conditions and surgical history.  The single most important (and thoughtful) thing a patient can do is keep an up-to-date list of medications, past/current medical history, surgical history, and allergies to bring to every doctor’s appointment and surgery.  This helps streamline and bring to the forefront your conditions and how these will interplay with your medical and surgical plan and postoperative care.  Please do not forget recreational drugs, smoking habit, and drinking habit in this list.  It is very important to know all of these things.  Also, your emotional history is very important.  Depression, anxiety, failure to cope, etc.  This all helps tie in your current living situation with stressors and your medical history.

Links for educating yourself in taking responsibility for your health:

obesity
From SilverStarUK.org

Suprascapular blocks

Trends are evolving in decreasing intraoperative and postoperative opioid use.  Therefore, anesthesiologists are constantly learning new regional techniques to help with postoperative pain.  For shoulder surgeries, I’ve moved away from interscalene blocks toward supraclavicular blocks.  I think the interscalene block provides a better block of a total shoulder surgery, however, certain patient comorbidities often make the supraclavicular block a better choice.

Nice paper from Anesthesiology, Dec 2017: Suprascapular and Interscalene Nerve Block for Shoulder Surgery: A Systematic Review and Meta-analysis. Anesthesiology 12 2017, Vol.127, 998-1013.

Nowadays, it seems that suprascapular blocks are gaining in popularity (I’d probably use it to supplement the supraclavicular block.

Supplies and Technique (from USRA):

Suprascapular Nerve

ssn1

How to position the ultrasound probe:

ssn5
From USRA

05_1_a_shoulder-suprascapular-artery-and-nerve_dsc_5085_copy

Ultrasound Image

ssn4
From USRA.  SSM = supraspinatus muscle
SSA = suprascapular artery
SSN = suprascapular nerve
TZM = trapezius muscle
STSL = superior transverse scapular ligament

05_1_c_shoulder-suprascapular-artery-and-nerve_labels

Useful Links

Emergency Checklists

It seems like in today’s day and age, emergencies are occurring everywhere.  From hurricanes to shooters to earthquakes and fires… I think it’s always important to know what to do.  Here are some fabulous checklists I’ve found for getting through those emergencies.  These are not substitutions for knowledge and training.  Clinical judgement warranted.

Emergency Manual from Stanford — Printable PDF

Ariadne Labs OR Crisis Checklist

Ariadne Labs Safe Surgery Checklist Template

Ariadne Labs Ambulatory Safe Surgery Checklist Template

Project Check

Newton-Wellesley’s L&D Checklists

WHO Safe Childbirth Checklist

Checklist for Trauma Anesthesia

ASRA checklist for Local Anesthetic Systemic Toxicity

WHO Surgical Safety Checklist

WHO H1N1 Checklist

Johns Hopkins Central Line Checklist

STS Adult Cardiac Surgery Checklist

Ariadne Labs Cardiac Surgery Checklist

STS General Thoracic Surgery Checklist

STS Congenital Heart Surgery Checklist

University of Kansas Daily ICU Quality Checklist

failed-rsi-gd

Transthoracic Echocardiography (TTE)

Transthoracic echo: a beginner’s guide #tte #cardiac #echo #meded

Knowing how to do a quick focused echo exam can be instrumental in diagnosis as well as treatment.  This has helped me determine how severe cardiac tamponade has been in an emergent case prior to induction when there was no prior echo.  There are so many more useful answers that a bedside echo can provide.  Time to get acquainted.

Helpful links:

acoustic_windows
From Visible Heart Lab

Helpful articles:

b9780323089296000081_f008-001ad-9780323089296
From ClinicalGate.com

The physician anesthesiologist vs. CRNA debate

Why is this even a debate?

It seems to me that the CRNA-led debate is financial… once you tease through all the fluff.

So here’s some literature I found:

As an anesthesiologist, I work in an MD-only anesthesia group. This is by choice: I prefer doing my own cases and being responsible for my own liabilities. The times I have required an anesthetic, I have requested a physician anesthesiologist. As a resident, I had very good insurance coverage, so I wanted a physician for my surgery. At that time, I was ok with having a resident anesthesiologist paired with an attending anesthesiologist for my case. My second surgery was done at my current hospital, and we only have MD anesthesiologists. Perhaps I’m biased? I know and I understand the path/journey/training it takes to get to become a physician anesthesiologist. I want someone who is well-trained, independently thinks, vigilant, and knowledgeable.

I’m sure there are great CRNAs out there… but when I was a resident… we used to supervise CRNAs in our final training year…. and it was scary some of things they would do. Who extubates from a trach R&R on 30% FiO2? Yeah, that particular CRNA told me they had 30 years experience. 30 years experience of doing something wrong doesn’t equate to 30 years of knowledgeable experience. And let’s not forget that CRNAs need a 15 minute morning break, 30 minute lunch break, and 15 minute afternoon break and they go home when their “shift” ends (even if it’s in the middle of a complex case). I take a break when I can… I eat lunch and take a bathroom break when I can…. and I choose to stay and finish complex cases for better continuity of care.

Would you want a nurse practitioner or physician assistant solely performing your surgery without a surgeon? I know I would NOT. I think there’s plenty of room for teamwork in healthcare. This is how to improve hospital efficiency and patient care. My fear is if CRNAs gain independence for purely financial reasons. But then, they will have to carry their own liability, cover their own breaks, take night call and discover that they had it so good in a healthcare team.

Opinions from other physician anesthesiologists:

 

Bottom line in my opinion:

  • Physicians endure years of grueling medical education that starts with the why, how, and treatment of disease. This is followed with years of residency training specifically in anesthesia. There’s also further training in the form of a fellowship for specialized fields.
  • Getting into medical school is an extremely competitive process. You take the top 1% of college graduates and high MCAT scores to get into medical school.  The board certification for becoming certified in anesthesiology is quite complex and difficult in both the written and oral board exams.
  • I will continue to be FOR team-based physician-led anesthesia care.