Intraoperative laparoscopic complications for urological cancer procedures

Litigation Patterns in Oncologic Nephrectomies: A 30-Year Review

Introduction: The litigious environment encompassing the medical-legal domain is an increasing concern for surgical fields, with urology being no exception. The objective of our study was to systematically review, evaluate, and summarize the factors associated with oncologic nephrectomy litigation to determine possible factors contributing to verdicts or settlements. Materials and Methods: Publicly available verdict reports were retrieved using the Westlaw^® legal database (Reuters). Cases were identified using the search term "nephrectomy" with dates ranging from January 1, 1990 to July 1, 2019. Each case was evaluated by two independent reviewers for defendant specialty, alleged breach in treatment, resulting complications, verdict outcomes, and indemnity payment. Complications were determined to be preoperative, perioperative, and postoperative. Data were analyzed using SPSS software to produce the descriptive statistics. Results: After accounting for duplicates and irrelevant cases, a total of 103 cases were analyzed with more than three-fourths being radical nephrectomies (78%). The most common claim was preoperative negligence (48%); however, negligence in perioperative care received the highest average monetary payment of $5,493,151. Forty-one percent of cases were perioperative with the majority being attributed to vascular injury (46%). The type of perioperative negligence claims and its average payment were found to be statistically significant (p = 0.042). Overall, 57% of cases denied the plaintiff's claims, whereas 28% were awarded. Conclusions: Our data show that although the highest number of cases were caused by preoperative negligence, perioperative negligence accounts for the highest settlement awards. This review provides insights into stages of management in the surgical management of renal cell cancer patients that may be subject to litigation.

Laparoscopic Insertion of Various Shaped Trocars in a Porcine Model

BACKGROUND AND OBJECTIVE

The number of laparoscopic procedures increases annually with an estimated 3% of complications, one third of them linked to Verres' needle or trocar insertion. The safety and efficacy of ports insertion during laparoscopic surgery may be related the technique but also to trocar design. This study aims to compare physical parameters of abdominal wall penetration for 5 different trocars.

METHODS

Eleven pigs were studied. Five different commercially available trocars were randomically inserted at the midline. Real-time video recording of the insertions was achieved to measure the excursion of the abdominal wall and the time and distance the cutting surface of the bladed trocars was exposed inside the abdominal cavity. An especially designed hand sensor was developed and placed between the trocar and the hand of the surgeon to record force required for abdominal wall perforation.

RESULTS

Greater deformations and forces occurred in nonbladed as compared to bladed trocars, and in conical trocars as compared to pyramidal pointed ones, except for peritoneum perforation. Greater distance and time of blade exposure occurred in pyramidal laminae as compared to conical.

CONCLUSION

The bladed trocars have lower forces and deformations in their introduction, and should be those that cause less injury and are more suitable for first entry. Conical and pyramidal trocars with the same blade size showed similar force, deformation, time, and distance of exposed blade.

Freehand diffuse optical spectroscopy imaging for intraoperative identification of major venous and arterial vessels underlying peritoneal fat: an in vivo demonstration in a pig model

Inadvertent injury to important anatomic structures is a significant risk in minimally invasive surgery (MIS) that potentially requires conversion to an open procedure, which results in increased morbidity and mortality. Surgeons operating minimal-invasively currently do not have an easy-to-use, real-time device to aid in intraoperative identification of important anatomic structures that underlie tissue planes. We demonstrate freehand diffuse optical spectroscopy (DOS) imaging for intraoperatively identifying major underlying veins and arteries. An applicator probe that can be affixed to and detached from an 8-mm laparoscopic instrument has been developed. The 10-mm DOS source-detector separation renders sampling of tissue heterogeneities a few millimeters deep. DOS spectra acquired consecutively during freehand movement of the applicator probe on the tissue surface are displayed as a temporal and spectral image to assist in spatially resolved identification of the underlying structures. Open surgery identifications of the vena cava and aorta underlying peritoneal fat of ∼4  mm in thickness using the applicator probe under room light were demonstrated repeatedly in multiple pigs in vivo.