High-quality cardiac surgery through teamwork

The high-quality cardiothoracic surgery program is primed for mindful effective surgery. The challenge lies in attaining mindful skills and efficiency. Herein is one journey toward high departmental quality over two decades.

Rapid Discovery of Functional Small Molecule Ligands against Proteomic Targets through Library-Against-Library Screening

Identifying “druggable” targets and their corresponding therapeutic agents are two fundamental challenges in drug discovery research. The one-bead-one-compound (OBOC) combinatorial library method has been developed to discover peptides or small molecules that bind to a specific target protein or elicit a specific cellular response. The phage display cDNA expression proteome library method has been employed to identify target proteins that interact with specific compounds. Here, we combined these two high-throughput approaches, efficiently interrogated approximately 10¹³ possible molecular interactions, and identified 91 small molecule compound beads that interacted strongly with the phage library. Of 19 compounds resynthesized, 4 were cytotoxic against cancer cells; one of these compounds was found to interact with EIF5B and inhibit protein translation. As more binding pairs are confirmed and evaluated, the “library-against-library” screening approach and the resulting small molecule–protein domain interaction database may serve as a valuable tool for basic research and drug development.

Practice improves performance on a coronary anastomosis simulator, attending surgeon supervision does not

OBJECTIVES

Enthusiasm for simulation early in cardiothoracic surgery training is growing, yet evidence demonstrating its utility is limited. We examined the effect of supervised and unsupervised training on coronary anastomosis performance in a randomized trial among medical students.

METHODS

Forty-five medical students were recruited for this single-blinded, randomized controlled trial using a low-fidelity simulator. After viewing an instructional video, all participants attempted an anastomosis. Subsequently, the participants were randomized to 1 of 3 groups: control (n = 15), unsupervised training (n = 15), or supervised training with a cardiothoracic surgeon or fellow (n = 15). Both the supervised and unsupervised groups practiced for 1 hour per week. After 4 weeks, the participants repeated the anastomosis. All pre- and posttraining performances were videotaped and rated independently by 3 cardiothoracic surgeons blinded to the randomization. All raters scored 13 assessment items on a 1 to 5 (low-high) scale along with an overall pass/fail rating.

RESULTS

After the training period, all 3 groups showed significant improvements in composite scores (control: +0.52 ± 0.69 [P = .014], unsupervised: +1.05 ± 0.48 [P < .001], and supervised: +1.10 ± 0.84 [P < .001]). Compared with control group, both supervised (P = .005) and unsupervised trainees (P = .005) demonstrated a significant improvement. Between the supervised and unsupervised groups there were no statistically significant differences in composite scores.

CONCLUSIONS

Practice on low-fidelity simulators enabled trainees to improve on a broad range of skills; however, the additional effect of attending-level supervision is limited. In an era of increasing staff surgeon responsibilities, unsupervised practice may be sufficient for inexperienced trainees.

Natural orifice translumenal endoscopic surgery (NOTES(®)): a technical review

INTRODUCTION

The clinical NOTES literature continues to grow. This review quantifies the published human NOTES experience to date, examines instrument use in detail, and compiles available perioperative outcomes data.

METHODS

A PubMed search for all articles describing human NOTES cases was performed. All articles providing a technical description of procedures, excluding cases limited to diagnostic procedures, specimen extraction, fluid drainage or gynecological procedures, were reviewed. Two reviewers systematically cataloged the technical details of each procedure and performed a frequency analysis of instrument use in each type of case. Available outcomes data were also compiled.

RESULTS

Forty-three discrete articles were reviewed in detail, describing a total of 432 operations consisting of transvaginal (n = 355), transgastric (n = 58), transesophageal (n = 17), and transrectal (n = 2) procedures, with 90% of cases performed in hybrid fashion with laparoscopic assistance. Cholecystectomy (84% of cases) was the most common procedure. Analysis of key steps included choice of endoscope, establishment of peritoneal access, dissection, specimen extraction, and closure of the access site. Analysis of instrument use during transvaginal cholecystectomy revealed variation in the choice of endoscope and the technique for establishment of access. A majority of these procedures relied heavily on the use of rigid and transabdominal instrumentation. Closure of the vaginotomy site was found to be well standardized, performed with an open suturing technique. Similar analysis for transgastric procedures revealed consistency in the choice of flexible endoscope as well as access and closure techniques. Perioperative outcomes from NOTES procedures were reported, but the data are currently limited due to small case numbers.

CONCLUSIONS

NOTES is most commonly performed using a hybrid, transvaginal approach. Although some aspects of these procedures appear to be well standardized, there is still significant variability in technique. More outcomes data with standardized reporting are needed to determine the actual risks and benefits of NOTES.