Heat loss during carbon dioxide insufflation: comparison of a nebulization based humidification device with a humidification and heating system.

Introduction: This study compared the heat loss observed with the use of MR860 AEA Humidifier™ system (Fisher & Paykel Healthcare, New Zealand), which humidifies and heats the insufflated CO(2), and the use of the AeronebPro™ device (Aerogen, Ireland), which humidifies but does not heat the insufflated CO(2).

Methods: With institutional approval, 16 experiments were conducted in 4 pigs. Each animal, acting as its own control, was studied at 8-day intervals in randomized sequence with the following four conditions: (1) control (C) no pneumoperitoneum; (2) standard (S) insufflation with nonhumidified, nonheated CO(2); (3) Aeroneb™ (A): insufflation with humidified, nonheated CO(2); and (4) MR860 AEA humidifier™ (MR): insufflation with humidified and heated CO(2).

Changes in core temperature during peritoneal insufflation: comparison of two CO2 humidification devices in pigs.

Background: Various modifications of the physical status of CO2 have been used to reduce hypothermia caused by flow of insufflating gas. This animal study aimed to investigate the effects on core temperature, of insufflation with CO2 using two different humidification devices: unheated, humidified CO2 using the Modified-Aeroneb system (Nektar, San Carlos, CA) and warmed, humidified CO2 using the HME-Booster (Medisize, Hillegom, The Netherlands).

Methods: We undertook a prospective four-session study on a homogeneous group of four pigs.

Learning fibreoptic intubation with a virtual computer program transfers to 'hands on' improvement.

Background And Objective: Fibreoptic intubation is an essential skill in anaesthesiology that is challenging to learn in the clinical setting. The goal of this study was to evaluate 'virtual fibreoptic intubation' (VFI) software as an adjunct to the traditional fibreoptic intubation teaching.

Methods: After informed consent, 42 undergraduate medical students were randomized into two groups.

Methylene blue dye, an accurate dye for sentinel lymph node identification in early breast cancer.

Purpose: The aim of this prospective study was to analyze the safety of methylene blue dye (MBD) and compare its efficacy with that of isotopic mapping for sentinel lymph node (SLN) identification in breast cancer.

Patients And Methods: The SLN procedure, involving isotopic mapping and MBD (subareolar intraparenchymal injections of 2 mL, 10 mg/mL), was performed on 100 patients with early breast cancer.

Results: The procedure was safe with a success rate of 99%; SLNs were, respectively, found in 65% by MBD, in 73% by lymphoscintigraphy and in 94% by gamma-probe.

Cold nebulization used to prevent heat loss during laparoscopic surgery: an experimental study in pigs.

Background: Prolonged abdominal laparoscopy is responsible for a significant drop in core body temperature. Various modifications of the conditioning for the insufflating carbon dioxide (CO(2)) to prevent the specific hypothermia related to the insufflated gas have been tested. This study aimed to investigate the effects on core temperature of insufflation with unheated humidified CO(2) using the Aeroneb system compared with the use of standard gas and gas made hot and wet using a warming and humidifying system (Pall system).

Calibrated pneumoperitoneal venting to prevent N2O accumulation in the CO2 pneumoperitoneum during laparoscopy with inhaled anesthesia: an experimental study in pigs.

Unlabelled: Nitrous oxide (N2O) accumulates in the CO2 pneumoperitoneum during laparoscopy when N2O is used as an adjuvant for inhaled anesthesia. This may worsen the consequences of gas embolism and introduce a fire risk. In this study, we quantified the pneumoperitoneal gas venting necessary to prevent significant contamination by inhaled N2O.