Lelan F. Sillin

Development and validation of a comprehensive program of education and assessment of the basic fundamentals of laparoscopic surgery

IN THE LATE 1990S THE Society of American Gastrointestinal Endoscopic Surgery (SAGES) formed a committee (Fundamentals of Laparoscopic Surgery or FLS) and charged it to develop educational materials covering the basic fundamentals of laparoscopic surgery. Four major principles guided the committee’s developmental process. First, comprehensive coverage of the domain of basic laparoscopy was seen as involving two components: one cognitive (declarative knowledge); and the other psychomotor (procedural skill). Second, the focus of the program was to be on the educational material considered unique to laparoscopy and not on material normally encountered during open surgical training. Third, in accordance with the idea of basic fundamentals, any content specific to a particular anatomic location or to a specific laparoscopic procedure was to be avoided. And fourth, the program was to contain mechanisms for assessment as well as for didactic instruction. The overall goal of the FLS program was to ‘‘teach a standard set of cognitive and psychomotor skills to practitioners of laparoscopic surgery’’ in the belief that knowledge and application of these fundamentals would help ‘‘ensure a minimal standard of care for all patients undergoing laparoscopic surgery.’’ The didactic learning modules are

Laparoscopic repair of large type III hiatal hernia: objective followup reveals high recurrence rate

BACKGROUND Recent studies based on symptomatic outcomes analyses have shown that laparoscopic repair of large type III hiatal hernias is safe, successful, and equivalent to open repair. These outcomes analyses were based on a relatively short followup period and lack objective confirmation that the hernia has not recurred. The aim of this study was to compare the outcomes of laparoscopic and open repair of large type III hiatal hernia using both symptomatic evaluation and barium study to assess the integrity of the repair. STUDY DESIGN Fifty-four patients underwent repair of a large type III hiatal hernia between 1985 and 1998. The surgical approach was laparotomy in 13, thoracotomy in 14, and laparoscopy in 27. An antireflux procedure was included in all patients. Symptomatic outcomes were assessed using a structured questionnaire at a median of 24 months and was complete in 51 of 54 patients (94%). A single radiologist, without knowledge of the operative procedure, assessed the integrity of the repair using video esophagram. Videos were performed at a median of 27 months (35 months open and 17 laparoscopic) and were completed in 41 of 54 patients (75%). RESULTS Symptomatic outcomes were similar in both groups with excellent or good outcomes in 76% of the patients after laparoscopic repair and 88% after an open repair. Reherniation was present in 12 patients and was asymptomatic in 7. A recurrent hernia was present in 12 of the 41 patients (29%) who returned for a followup video esophagram. Forty-two percent (9 of 21) of the laparoscopic group had a recurrent hernia compared with 15% (3 of 20) of the open group (p < 0.001 log-rank value on recurrence-free followup). CONCLUSIONS Laparoscopic repair of type III hiatal hernias is associated with a disturbingly high (42%) prevalence of recurrent hernia. More than half such recurrences have few, if any, symptoms.

Absence of Gastroesophageal Reflux Disease in a Majority of Patients Taking Acid Suppression Medications After Nissen Fundoplication

Recent studies have shown that many patients use acid suppression medications after antireflux surgery. The aim of this study was to determine the frequency of gastroesophageal reflux disease in a cohort of surgically treated patients with postoperative symptoms and a high prevalence of acid suppression medication use. The study group consisted of 86 patients who had symptoms following Nissen fundoplication that were sufficient to merit evaluation with 24-hour distal esophageal pH monitoring. All completed a detailed symptom questionnaire. The mean postoperative follow-up period was 28 months (median 18 months). Thirty-seven patients (43%) were taking acid suppression medications after fundoplication. Only 23% (20 of 86) of all the patients and only 24% (9 of 37) of those taking acid suppression medications had abnormal esophageal acid exposure on the 24-hour pH study. Heartburn and regurgitation were the only symptoms that were significantly associated with an abnormal pH study. Endoscopic assessment of the fundoplication was the most significant factor associated with an abnormal pH study. Multivariable logistic regression analysis showed that patients with a disrupted, abnormally positioned fundoplication had a 52.6 times increased risk of abnormal esophageal acid exposure. Most patients who use acid suppression medications after antireflux surgery do not have abnormal esophageal acid exposure, and the use of these medications is thus often inappropriate. Because of the limited predictive power of symptoms, objective evidence of reflux disease should be obtained before prescribing acid suppression medication for patients who have undergone antireflux surgery.

Current concepts in the management of paraesophageal hiatal hernia.

Herniation of a portion of the stomach through the esophageal hiatus into the posterior mediastinum is a common affliction of humans. The incidence of hiatal hernia is difficult to determine because of the absence of symptoms in a large number of patients. Upper gastrointestinal barium examinations in symptomatic patients identify some type of hiatal hernia in as many as 15% of patients.

A quarter Wheatstone bridge strain gage force transducer for recording gut motility.

Quarter and half Wheatstone bridge extraluminal force transducers for recording of gastrointestinal motility are compared. Modification of the transducer to a quarter bridge is economical, simplifies construction, and improves longevity by eliminating the crossover wire which frequently short circuits. The quarter bridge transducer was found to be as accurate and sensitive as the half bridge transducer.

Effect of transjugular intrahepatic portosystemic shunt on secondary hypersplenism

BACKGROUND Portal hypertension is frequently associated with secondary hypersplenism, two common clinical manifestations of which are leukopenia and thrombocytopenia. Surgical portosystemic shunts alleviate portal hypertension but their effect on hypersplenism remains unpredictable. Transjugular intrahepatic portosystemic shunt (TIPS) is a minimally invasive procedure for portal decompression. From current reports it is not clear if TIPS improves hypersplenism in patients with portal hypertension. We present a retrospective review of our experience with TIPS to determine the effect on hypersplenism. PATIENTS AND METHODS Sixty-five patients who had a TIPS procedure between December 1991 and June 1994 were evaluated retrospectively. The records were specifically reviewed for platelet and white blood cell counts performed before the procedure, within a week after the procedure, and then again within the subsequent 3 weeks. Hypersplenism was defined as thrombocytopenia (platelet count of <100,000/mm3), leukopenia (white blood cell count of <5,000/mm3), or both. RESULTS Thrombocytopenia alone was present in 33 patients and leukopenia alone in 4 patients before TIPS was performed. Both leukopenia and thrombocytopenia were present in 12 individuals. At least one of these indices of hypersplenism was present in 49 patients. Leukocyte count improved in 11 of 16 patients (69%) whereas platelet count improved in 34 of 45 patients (75%) within a week of the procedure. In the subsequent 3 weeks, leukopenia was relieved in 5 of 10 patients (50%) and thrombocytopenia in 21 of 28 patients (75%), respectively. Of the 12 patients who had both leukopenia and thrombocytopenia before TIPS, the indices improved in 4 patients (33%) within a week of the procedure. Thrombocytopenia was more consistently corrected as opposed to leukopenia, albeit in the short term. CONCLUSION The TIPS procedure is a promising, minimally invasive method of portal decompression that is effective in the treatment of complications of portal hypertension including secondary hypersplenism.

Fundamentals of endoscopic surgery cognitive examination: Development and validity evidence

BackgroundFlexible endoscopy is an integral part of surgical care. Exposure to endoscopic procedures varies greatly in surgical training. The Society of American Gastrointestinal and Endoscopic Surgeons has developed the Fundamentals of Endoscopic Surgery (FES), which serves to teach and assess the fundamental knowledge and skills required to practice flexible endoscopy of the gastrointestinal tract. This report describes the validity evidence in the development of the FES cognitive examination.MethodsCore areas in the practice of gastrointestinal endoscopy were identified through facilitated expert focus groups to establish validity evidence for the test content. Test items then were developed based on the content areas. Prospective enrollment of participants at various levels of training and experience was used for beta testing. Two FES cognitive test versions then were developed based on beta testing data. The Angoff and contrasting group methods were used to determine the passing score. Validity evidence was established through correlation of experience level with examination score.ResultsA total of 220 test items were developed in accordance with the defined test blueprint and formulated into two versions of 120 questions each. The versions were administered randomly to 363 participants. The correlation between test scores and training level was high (r = 0.69), with similar results noted for contrasting groups based on endoscopic rotation and endoscopic procedural experience. Items then were selected for two test forms of 75 items each, and a passing score was established.ConclusionsThe FES cognitive examination is the first test with validity evidence to assess the basic knowledge needed to perform flexible endoscopy. Combined with the hands-on skills examination, this assessment tool is a key component for FES certification.

Why fundamentals of endoscopic surgery (FES)

As flexible endoscopy has moved into the mainstream, gastroenterologists have embraced many of the skills and techniques particular to this modality of diagnosis and intervention. Their adoption of flexible endoscopic technology and training, and the lack of enthusiasm for endoscopic therapy potentials by surgeons, has left many surgical residents and practicing surgeons deficient in endoscopic skills. As a result, education of surgical residents in flexible endoscopy has lagged and training of surgical residents in flexible endoscopy is increasingly coming under scrutiny and has become an area of debate. The medical literature and practice guidelines are replete with articles from surgeons and gastroenterologists debating the appropriate education and training in flexible endoscopy. Both surgical and gastroenterology professional societies have published guidelines for training in flexible endoscopy. These guidelines are often at odds with each other, citing opposing literature supporting their position on appropriate criteria for training in basic upper and lower endoscopy [1–4]. Flexible endoscopy is a critical element of any general surgeon’s and colorectal surgeon’s practice. In 2007, 74 % of rural surgeons performed more than 50 flexible endoscopic procedures each year, with 42 % of rural surgeons performing more than 200 flexible endoscopic procedures annually [5]. In a 2010 report on rural, under-served areas that lack gastroenterology services, 39.8 % of an American general surgeons’ practice comprises flexible endoscopic procedures [6]. In Canada, surgeons were found to be the primary providers of flexible endoscopic services in smaller urban and rural areas [7]. The American Board of Surgery (ABS) has begun to address the training inequity that exists between general surgery residents and gastroenterology fellows [8]. In an effort to ensure surgical residents are fully trained and competent in flexible endoscopy, the ABS has not only increased the minimum requirements for training general surgery residents in flexible endoscopy but has also undertaken the task of formalizing a flexible endoscopy curriculum for its residents. Currently, the ABS and Residency Review Committee (RRC) recommend 35 upper endoscopic procedures and 50 colonoscopies as the minimum number of procedures to be performed by surgical residents. The Society of American Gastrointestinal and Endoscopic Surgeons (SAGES) and the ABS have long espoused that numbers do not ensure competency in surgical or endoscopic procedures. This position is fully supported by data. In 2004, the SAGES esophagogastroduodenoscopy (EGD) Outcomes Study Group prospectively reviewed 3,525 EGDs performed by surgeons, showing a high degree of success with low morbidity. There was no correlation between experience (i.e. number of cases performed) and completion rates or major complications [9]. A similar trial by the SAGES Colonoscopy Study Outcomes Group prospectively reviewed 13,580 colonoscopies performed by surgeons and found no correlation between experience and complications, with an acceptable success rate. The investigators noted that a minimum of 50 colonoscopies with 100 performed annually showed a significant improvement in completion rates Taskforce Members are listed in Appendix.

Reduction in tissue blood flow in J-shaped pelvic ileal reservoirs.

PURPOSE: This study sought to evaluate tissue blood flow during J-shaped ileal reservoir construction. METHODS: Using laser Doppler flowmetry, tissue blood flow was measured at various locations in J-shaped ileal reservoirs constructed in 10 dogs before pouch-anal anastomosis. For 12 weeks postoperatively, animals were assessed for clinical complications. In another five dogs, tissue blood flow was measured at various stages of J-pouch construction. RESULTS: Tissue blood flow in the reservoir was reduced and was lowest at the “apex” of the “J”. the site of clinical stricture in one animal. During reservoir construction, longitudinal enterotomy was associated with the greatest reduction in tissue blood flow. Lowest blood flow in the reservoir was at the site of the intended pouch-anal anastomosis (11.5±1.6 ml/100 g/minvs.43.4±3.4 ml/100 g/min (controls);P<0.05). CONCLUSIONS: Operative maneuvers of J-shaped ileal reservoir construction, particularly longitudinal enterotomy, significantly reduce tissue perfusion in the involved bowel segment. Tissue blood flow in the pouch is lowest at the site of intended pouch-anal anastomosis, and this may contribute to development of complications seen clinically.

Gearing up for milestones in surgery: Will simulation play a role?

BACKGROUND The Consortium of American College of Surgeons-Accredited Education Institutes was created to promote patient safety through the use of simulation, develop new education and technologies, identify best practices, and encourage research and collaboration. METHODS During the 7th Annual Meeting of the Consortium, leaders from a variety of specialties discussed how simulation is playing a role in the assessment of resident performance within the context of the Milestones of the Accreditation Council for Graduate Medical Education as part of the Next Accreditation System. CONCLUSION This report presents experiences from several viewpoints and supports the utility of simulation for this purpose.