Surgical endoscopy
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Comparative Study
Effect of extraperitoneal carbon dioxide insufflation on intraoperative blood gas and hemodynamic changes.
Carbon dioxide pneumoperitoneum has been shown to produce respiratory and hemodynamic changes due to both CO2 absorption and the effects of increased intraperitoneal pressure. We have measured the blood gas, end-tidal CO2, and hemodynamic changes produced during extraperitoneal CO2 insufflation (n = 22). These have been compared with the changes occurring during CO2 pneumoperitoneum (n = 11) under standardized anesthetic conditions. ⋯ We have found a similar magnitude of rise in arterial pCO2 during extraperitoneal insufflation (median 0.83 kPa), but the rate of rise was significantly slower (P < 0.05). In addition, there was no change in the mean arterial pressure during extraperitoneal insufflation. Our results suggest that extraperitoneal CO2 insufflation may be safer than CO2 pneumoperitoneum in patients with preexisting cardiorespiratory disease.
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Video-assisted thoracoscopic surgery (VATS) is an established modality in the management of pleural diseases. We report a case of port-site recurrence following management of malignant pleural effusion in an elderly patient with extensive pleural metastasis from adenocarcinoma of the lung. Although her shortness of breath was relieved following VAT decortication and talc insufflation, at 3 months she was found to have a 2.5-cm subcutaneous nodule at the camera port site which on biopsy was confirmed to be metastatic in nature. Even though the nodule was asymptomatic and the patient prognosis was not affected, it is important that both the surgeon and future patients should be aware of this potential complication.
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Case Reports
Cholecystectomy in the peritoneal dialysis patient. Unique advantages to the laparoscopic approach.
Laparoscopic cholecystectomy has proven to be a safe and effective treatment for symptomatic gallstone disease. Several subsets of patients, however, may not be candidates for the laparoscopic approach, including patients with morbid obesity, acute cholecystitis, and previous abdominal surgery. ⋯ We performed laparoscopic cholecystectomy on three peritoneal dialysis patients without intraoperative complications. We have noted several unique advantages to laparoscopic surgery in this patient population and advocate this approach in peritoneal dialysis patients requiring cholecystectomy.
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Comparative Study
Laparoscopy without pneumoperitoneum. Effects of abdominal wall retraction versus carbon dioxide insufflation on hemodynamics and gas exchange in pigs.
Laparoscopic surgery with CO2 insufflation is associated with adverse effects on hemodynamics and gas exchange. The abdominal wall retractor (AWR) is an alternative for pneumoperitoneum. Hemodynamics and gas exchange during the use of an AWR were compared to those of CO2 pneumoperitoneum. ⋯ Peak airway pressures increased 50%, end-tidal CO2 increased 20%, and respiratory acidosis was induced (arterial pH from 7.46 +/- 0.07 to 7.31 +/- 0.06 and pCO2 from 33 +/- 3 mmHg to 53 +/- 4 mmHg). Arterial PO2 decreased but mixed venous oxygen saturation and oxygen consumption were unaffected. In contrast with CO2 pneumoperitoneum, laparoscopy using abdominal wall retraction was not associated with adverse effects on hemodynamics or gas exchange.
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A 22-year-old man who had previously undergone work-up for right cryptorchidism and been diagnosed as having right testicular absence was referred for repair of a right inguinal hernia. A laparoscopic approach was chosen for this patient, and at the time of laparoscopic herniorrhaphy, a small intraabdominal testicle was visualized and removed laparoscopically. ⋯ Advances in laparoscopy now enable detection and definitive treatment for these patients without the need for large, more painful incisions. The laparoscopic approach to this patient enabled diagnosis and management of his cryptorchidism and provided a means for repair of his hernia.