Clinical Forum: Evidence Based Management

“Show me the money”   “Where’s the beef?”  Health care delivery has evolved over the past few decades to evidence based practice.  With the emergence of new drugs, techniques, and regulations health care providers are demanding “where’s the evidence”.  In our quest for evidence to guide our medical resource management, we often overlook the fact that our personnel are the most important resource that we manage.

An excellent article by Vicki Hess, RN published in Hospital and Health News (Jan 19, 2012) encourages evidence based management as a tool for increasing employee satisfaction and productivity.

In the article, Vicki states that in recent years, scholars have studied and written about evidence-based leadership and evidence-based management. A logical progression in this thinking is evidence-based employee engagement. Employees are engaged when they are satisfied (they like what they do), energized (they put effort behind it) and productive (their work contributes to organizational goals). Leaders who are effective in engaging others are facilitators of the engagement process. Because no one external source can motivate an employee, providing an environment that encourages intrinsic motivators is critical.

The article continues with the concept that employee preferences are an important but often overlooked factor in department management.  Engaged managers are in  touch with employee preferences and make personal contact with employees on a daily basis.

She concludes that by adopting an evidence-based employee engagement approach that combines current engagement research, leadership insights and employee preferences, leaders can positively impact important business results without subtracting from the bottom line.

Click here to read the excellent article by Vicki Hess, RN

 

 

Clinical Forum: Propofol dose in the Obese Patient

As the American population grows both in number and size, anesthetists are challenged with selecting the proper dose of drugs.  Some believe that doses should be based on actual body weight while others believe that calculating a dose based on lean weight or ideal weight are better options.  In this study published in Anesth Analg. 2011 Jul;113(1):57-62. Epub 2010 Sep 22,  Ingrande J, et al compared the induction dose of propofol in obese patients using actual weight and lean body weight.

The authors found that patients receiving propofol based on actual body weight received a larger total dose and shorter time to loss of consciousness.  When given based on lean body weight, patients had similar time to loss of consciousness.  The authors concluded that lean body weight appears to be the most appropriate plan for dosing propofol in the obese patient.

Click here to read the original abstract of the work described in this post.  Return to www.procrna.com and leave a comment.

 

Clinical Topic: Post-op Fluids for Children

The literature is full of studies related to postoperative nausea and vomiting.   I once heard an Anesthesia instructor say “if I have one more student do a vomiting study, I’m going to puke”.  Even so, PONV continues to be a problem and creative investigators continue to find new aspects to study.

A recent study by Mercan et al published in Paediatric Anaesthesia looked at the timing and temperature of the first liquid given after recovery from anesthesia.  Different groups of Children were given a first liquid at different time intervals and different temperatures following recovery.  Liquids were either at room temperature or at body temperature.  The researchers found that children receiving liquids at body temperature had significantly less post-operative vomiting than children receiving liquids at room temperature.

Click here to read more about this study and their findings.

Standards, the Expert Witness

Submitted by Pamela Chambers, MSN, CRNA, EJD

Click here for Lex Terrae consulting

As we all know, legislative bodies enact the laws that we must all abide by – whether we are aware of them or not.  Ignorance of the law is rarely a defense to violating it, whereas professions set their own standards of care.  Ignorance of the standard of care while not illegal, may be described as poor practice.  But how does the public – or the courts, know what constitutes poor practices? How would a court determine the standard of care for nurse anesthesia practice in Temple, TX; or in Dallas, TX; or in Bay City, TX?

The United States Supreme Court held that expert opinion is only admissible when it is generally accepted as reliable the relevant scientific community Frye v. United States, 54 App.D.C. 46, 293 Fed.1013 (1923). The decision handed down in Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579, 113 S.Ct. 2786, 125 L.Ed.2d 469 (1993) went a step further in clarifying that expert testimony must have a valid scientific connection to the issues of a particular case.  So why is this important to know?

Upon review of Carolan v. Hill, 553 N.W. 2d 882, Iowa 996, the issue on appeal was the admissibility of expert testimony.  The harm suffered by the plaintiff (Carolan) was ulnar nerve damage sustained during the administration of anesthesia for a surgical procedure unrelated to plaintiff’s arm. The trial court refused to allow the plaintiff’s expert witness testimony.  The trial court relied upon its interpretation of the Iowa Code regarding who could establish standard of care. On appeal, the Iowa Supreme Court clarified the interpretation of the law in Iowa.  The relevant code noted that a “person” qualified to provide expert testimony shall be so qualified based on medical or dental qualifications that relate directly to the issues in the case at bar. Furthermore, if the legislature had intended qualified individuals be restricted to physicians and dentists, it would have done so explicitly. In this instance, this issue was reversed (overturned the jury verdict for the defendant anesthesiologist) and remanded to the lower court.  Plaintiff’s expert witness was a Nurse Anesthetist.

The Federal Rules of Evidence, rule 702, state the following with regard to expert witnesses: A witness who is qualified as an expert by knowledge, skill, experience, training, or education may testify in the form of an opinion or otherwise if: the expert’s scientific, technical, or other specialized knowledge will help the trier of fact to understand the evidence or to determine a fact in issue; the testimony is based on sufficient facts or data; the testimony is the product of reliable principles and methods; and the expert has reliably applied the principles and methods to the facts of the case.  This rule is based largely on Daubert, but has been amended and modified as other landmark decisions (such as Kumho Tire Co. v. Carmichael, 119 S.Ct. 1167 (1999) have been decided regarding expert testimony.

Daubert set forth a non-exclusive checklist for trial courts to use in assessing the reliability of scientific expert testimony. The specific factors delineated by the Daubert Court are (1) whether the expert’s technique or theory can be or has been tested—that is, whether the expert’s theory can be challenged in some objective sense, or whether it is instead simply a subjective, conclusory approach that cannot reasonably be assessed for reliability (i.e. an opinion); (2) whether the technique or theory has been subject to peer review and publication; (3) the known or potential rate of error of the technique or theory when applied; (4) the existence and maintenance of standards and controls; and (5) whether the technique or theory has been generally accepted in the scientific community. The Court in Kumho held that these factors might also be applicable in assessing the reliability of nonscientific expert testimony, depending upon “the particular circumstances of the particular case at issue.” 119 S.Ct. at 1175.

So what does all of this mean?  How does affect your practice if it affects it at all?  Consider this,  when you make a decision as to which nondepolarizing muscle relaxant you will use (when you have a choice) ask yourself if the decision you’ve made is accepted practice.  When you decide to conduct your anesthetic in a manner that you deem best for your patient, ask yourself if the methods that you use are (still) relevant and valid? If any of us are practicing the “way we’ve always done it”, ask yourself this question – Is this defensible in a court of law?

About the author:  Pamela Chambers is a staff CRNA a Central Texas regional trauma center and the affiliated Children’s hospital. Ms Chambers received her MSN in 2000 while on active duty in the U.S. Army; then received her Executive Juris Doctor (EJD) in Health Law in 2008 from Concord Law School. Ms. Chambers owns Lex Terrae Consulting a health law research and consulting firm and also teaches Legal Nurse Consulting for Kaplan University. Ms. Chambers is not an attorney. The information provided is legal research and should not replace consultation with an attorney or physician when warranted.  Click here to learn more about Lex Terrae Legal consulting services.

Radiation Exposure to Anesthetists

Radiation exposure has long been a concern to Radiologists and their assistants.  Lead aprons, thyroid shields and more recently leaded eyeware have reduced their exposure to radiation.  Anesthetists are frequently assigned to sedate / anesthetize patients in the interventional radiology suite.  Like the Radiologist, the anesthetist is exposed to radiation danger.

In a study by Anastasian, ZH, et al published in Anesthesiology, the facial exposure to radiation was compared between the Radiologist and the Anesthetist.   Both providers wore lead aprons.   The Radiologist wore leaded eyeglasses and stayed behind a leaded acrylic shield to the extent possible.  The Anesthesiologist also was instructed to stay behind a leaded shield to the extent possible and to keep maximum distance from the source of radiation.

The authors of the study demonstrated that the Anesthesiologist had a 3 fold increase in facial exposure to radiation than did the Radiologist, thus increasing the risk of developing cataracts.  Exposure of the Anesthesiologist was correlated to the number of pharmacologic interventions performed during the case.

The best ways to reduce exposure to radiation are distance and shielding.  Lightweight leaded eyeglasses reduce exposure of the cornea by 98% and are recommended for those spending significant time administering anesthesia for interventional radiology

Click here to review the work by Anastasian, ZH et al.

Please return to this site and leave a comment

Opioid-Induced Respiratory Depression

The Anesthesia Patient Safety Foundation is committed to the safe and reliable administration of every anesthetic.  An area of concern has been respiratory depression in the immediate postoperative period secondary to narcotic administration.  The following information comes directly from the foundation;

The APSF believes that clinically significant, drug-induced respiratory depression in the postoperative period remains a serious patient safety risk that continues to be associated with significant morbidity and mortality since it was first addressed by the APSF in 2006.1 The APSF envisions that “no patient shall be harmed by opioid-induced respiratory depression in the postoperative period,” and convened the second multidisciplinary conference on this serious patient safety issue in June of this year in Phoenix, AZ, with 136 stakeholders in attendance. The conference addressed “Essential Monitoring Strategies to Detect Clinically Significant Drug-Induced Respiratory Depression in the Postoperative Period.”

Click here to read the full report by the APSF regarding drug-induced depression in the postoperative period.  After reading the report, click the back arrow to return to this site and leave a comment for your colleagues.

Ketamine Supplement for Anesthesia

Ketamine is an old drug which has come in and out of favor many times over the past decades.  Currently, articles are emerging touting the advantages of Ketamine as a supplement for  both general anesthesia and monitored anesthesia care.  Below is a description by Pamela Chambers, CRNA regarding her clinical experience using Ketamine as a supplement.  Read her excellent review, scan the articles and leave a comment to share your experiences with your colleagues.

Submitted by Pamela Chambers, CRNA

Lexterrae legal consulting service

For the EP case that lasted 6+ hours, GETA with .5 mac Desflurane and Propofol infusion at 30 ug/kg/min, the Propofol Ketamine mixture performed very well.  I mixed 50mg Ketamine in each 50ml bottle of propofol.  I used less than 3 bottles for the case and never used more than .5 mac Des.  I used a total of 25 ug Fent, just after intubation, for the case.  The patient was 83 yo male, approx 90 kg, EF 20%.

Upon emergence the patient denied any pain or discomfort.  He was appropriately responsive to verbal and did not cough on extubation. VS were stable and he was A&O x3 on arrival to the EP room for phase 2 recovery.

A few days later, I used Ketamine as an analgesic adjunct for another long case (10 hr bilateral mastectomy and tram flap).  I used a total of 195 mg Ketamine.  The patient was an ASA 1.  After 100 ug Fent (and 3mg Versed) prior to induction, I used 30 mg Ketamine approximately 3 mins prior to incision.  Then I administered 30 mg Ketamine at hr number 2, and hr #3.  Around hr #4, I decreased the Ketamine to 15mg for each hrs successive dose with a plan to halt Ketamine admin when I believed the case was 2 hrs from completion.  My last Ketamine dose was at 1430 during the last phases of the case. The patient began spontaneous ventilations after reversal of NDMR at approximately 1640.  The case ended at approximately 1730.  The patient

received a total of 2200 ug Fent dosed approximately 100 ug every 30-45 mins.

Intermittent rescue doses for SNS spike were not required. Pressor agents were not used. Hemodynamics were extremely stable, almost like the proverbial railroad track!

Total fluid administered was 2 liters NS and 1 liter 5% Albumin, UO was 150 ml, EBL 300ml. I also adminstered 2 mg Versed at 1600 to facilitate decreasing the inhaled agent level and to ameliorate any emergence delirium associated with the Ketamine.  The patient was appropriately responsive to verbal prior to extubation, and did not cough during extubation.  She also denied any c/o pain immediately post-operatively. No emergence delirium was appreciated.

Click here to read a review article by Laskowshi et. al regarding Ketamine use

Click here to read an article by McCartney et al regarding the role of the NMDA receptor

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