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Meng-Meng T, Xue-Jun X, Xiao-Hong B. Clinical effects of warmed humidified carbon dioxide insufflation in infants undergoing major laparoscopic surgery. Medicine (Baltimore) 2019; 98:e16151. [PMID: 31277116 PMCID: PMC6635157 DOI: 10.1097/md.0000000000016151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
PURPOSE Some studies have reported that warmed humidified carbon dioxide (CO2) insufflation in adult laparoscopic surgery could reduce pain and improve the core body temperature (CBT). However, similar studies are lacking in infants. Thus, this study aimed to investigate the clinical effects of warmed, humidified CO2 insufflation in pediatric patients undergoing major laparoscopic surgeries. METHODS From January 2015 to December 2017, infants who underwent major laparoscopic surgeries in Ningbo Women and Children's Hospital were randomized to Group A (standard CO2 insufflation) or Group B (warmed humidified CO2 insufflation, 35°C, 95% relative humidity). Change in CBT at the end of surgery was the primary outcome. Secondary outcomes included surgery time, intraoperative blood loss, oxygen saturation (SO2), and Face, Legs, Activity, Cry and Consolability (FLACC) scale. These variables were compared between the 2 groups. RESULTS Sixty-three infants (38 females, 25 males) were included; 30 patients were in Group A and 33 in Group B. The diseases treated with the laparoscopic approach included congenital megacolon, congenital diaphragmatic hernia, and intestinal malrotation. No deaths were noted. CBT was significantly higher in Group B at the end of surgery (P = .021). The occurrence of postoperative shivering (P = .02), hypothermia (P = .032), bowel movement (P = .044), and hospital stay (P = .038) was significantly different between the 2 groups; Group B had less shivering and hypothermia occurrence after surgery. Moreover, Group B demonstrated a more rapid postoperative recovery of bowel movement and shortened hospital stay than Group A. There was no statistical difference in operative time (P = .162), intraoperative blood loss (P = .541), SO2 (P = .59), and FLACC scale (P = .65) between the 2 groups. CONCLUSION The use of warmed humidified CO2 insufflation in infants undergoing major laparoscopic surgery was helpful for maintaining normothermia and was associated with several positive postoperative outcomes, including less shivering and hypothermia, faster recovery of bowel movement, and shortened hospital stay.
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Affiliation(s)
| | - Xu Xue-Jun
- Department of Pediatric Surgery, Ningbo Women and Children's Hospital, Ningbo, China
| | - Bao Xiao-Hong
- Department of Pediatric Surgery, Ningbo Women and Children's Hospital, Ningbo, China
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Cheong JY, Keshava A, Witting P, Young CJ. Effects of Intraoperative Insufflation With Warmed, Humidified CO2 during Abdominal Surgery: A Review. Ann Coloproctol 2018; 34:125-137. [PMID: 29991201 PMCID: PMC6046539 DOI: 10.3393/ac.2017.09.26] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 09/26/2017] [Indexed: 11/17/2022] Open
Abstract
PURPOSE During a laparotomy, the peritoneum is exposed to the cold, dry ambient air of the operating room (20°C, 0%-5% relative humidity). The aim of this review is to determine whether the use of humidified and/or warmed CO2 in the intraperitoneal environment during open or laparoscopic operations influences postoperative outcomes. METHODS A review was performed in accordance with PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. The PubMed, OVID MEDLINE, Cochrane Central Register of Controlled Trials and Embase databases were searched for articles published between 1980 and 2016 (October). Comparative studies on humans or nonhuman animals that involved randomized controlled trials (RCTs) or prospective cohort studies were included. Both laparotomy and laparoscopic studies were included. The primary outcomes identified were peritoneal inflammation, core body temperature, and postoperative pain. RESULTS The literature search identified 37 articles for analysis, including 30 RCTs, 7 prospective cohort studies, 23 human studies, and 14 animal studies. Four studies found that compared with warmed/humidified CO2, cold, dry CO2 resulted in significant peritoneal injury, with greater lymphocytic infiltration, higher proinflammatory cytokine levels and peritoneal adhesion formation. Seven of 15 human RCTs reported a significantly higher core body temperature in the warmed, humidified CO2 group than in the cold, dry CO2 group. Seven human RCTs found lower postoperative pain with the use of humidified, warmed CO2. CONCLUSION While evidence supporting the benefits of using humidified and warmed CO2 can be found in the literature, a large human RCT is required to validate these findings.
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Affiliation(s)
- Ju Yong Cheong
- Colorectal Surgical Department, Concord Repatriation General Hospital, Sydney Medical School, The University of Sydney, Sydney, Australia
- Discipline of Pathology, Charles Perkins Centre, Sydney Medical School, The University of Sydney, Sydney, Australia
| | - Anil Keshava
- Colorectal Surgical Department, Concord Repatriation General Hospital, Sydney Medical School, The University of Sydney, Sydney, Australia
| | - Paul Witting
- Discipline of Pathology, Charles Perkins Centre, Sydney Medical School, The University of Sydney, Sydney, Australia
| | - Christopher John Young
- Colorectal Surgical Department, Concord Repatriation General Hospital, Sydney Medical School, The University of Sydney, Sydney, Australia
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Robson JP, Kokhanenko P, Marshall JK, Phillips AR, van der Linden J. Increased visceral tissue perfusion with heated, humidified carbon dioxide insufflation during open abdominal surgery in a rodent model. PLoS One 2018; 13:e0195465. [PMID: 29617447 PMCID: PMC5884566 DOI: 10.1371/journal.pone.0195465] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 03/22/2018] [Indexed: 01/07/2023] Open
Abstract
Tissue perfusion during surgery is important in reducing surgical site infections and promoting healing. This study aimed to determine if insufflation of the open abdomen with heated, humidified (HH) carbon dioxide (CO2) increased visceral tissue perfusion and core body temperature during open abdominal surgery in a rodent model. Using two different rodent models of open abdominal surgery, visceral perfusion and core temperature were measured. Visceral perfusion was investigated using a repeated measures crossover experiment with rodents receiving the same sequence of two alternating treatments: exposure to ambient air (no insufflation) and insufflation with HH CO2. Core body temperature was measured using an independent experimental design with three treatment groups: ambient air, HH CO2 and cold, dry (CD) CO2. Visceral perfusion was measured by laser speckle contrast analysis (LASCA) and core body temperature was measured with a rectal thermometer. Insufflation with HH CO2 into a rodent open abdominal cavity significantly increased visceral tissue perfusion (2.4 perfusion units (PU)/min (95% CI 1.23-3.58); p<0.0001) compared with ambient air, which significantly reduced visceral blood flow (-5.20 PU/min (95% CI -6.83- -3.58); p<0.0001). Insufflation of HH CO2 into the open abdominal cavity significantly increased core body temperature (+1.15 ± 0.14°C) compared with open cavities exposed to ambient air (-0.65 ± 0.52°C; p = 0.037), or cavities insufflated with CD CO2 (-0.73 ± 0.33°C; p = 0.006). Abdominal visceral temperatures also increased with HH CO2 insufflation compared with ambient air or CD CO2, as shown by infrared thermography. This study reports for the first time the use of LASCA to measure visceral perfusion in open abdominal surgery and shows that insufflation of open abdominal cavities with HH CO2 significantly increases visceral tissue perfusion and core body temperature.
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Affiliation(s)
| | | | | | - Anthony R. Phillips
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Jan van der Linden
- Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
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Sutton E, Bellini G, Grieco MJ, Kumara HMCS, Yan X, Cekic V, Njoh L, Whelan RL. Warm and Humidified Versus Cold and Dry CO 2 Pneumoperitoneum in Minimally Invasive Colon Resection: A Randomized Controlled Trial. Surg Innov 2017; 24:471-482. [PMID: 28653583 DOI: 10.1177/1553350617715834] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
INTRODUCTION Peritoneal insufflation with warm-humidified (WH) CO2 gas during minimally invasive surgical procedures is purported to prevent hypothermia and peritoneal desiccation and is associated with decreased postoperative IL-6 levels. This randomized study's purpose was to determine the clinical impact of WH versus cold-dry (CD) CO2 in minimally invasive colon resection (MICR), and to assess perioperative plasma levels of IL-6, TIMP-1, sVEGF-R1, and HSP-70 after MICR. METHODS Operative and short-term clinical data plus perioperative blood samples were collected on MICR patients randomized to receive either WH (36.7°C, 95% humidity) or CD (room temperature, 0% humidity) CO2 perioperatively. Peritoneal biopsies were taken at the start and end of surgery. Outcomes tracked included core temperature, postoperative in-hospital pain levels, analgesia requirements, and standard recovery parameters. Preoperative and postoperative days (PODs) 1 and 3 plasma protein levels were determined via ELISA. RESULTS A total of 101 patients were randomized to WH CO2 (50) or CD CO2 (51). The WH group contained more diabetics ( P = .03). There were no differences in indication, minimally invasive surgical method used, or core temperature. Pain scores were similar; however, the WH patients required less narcotics on PODs 1 to 3 ( P < .05), and less ketorolac on PODs 1 and 2 ( P < .03). No differences in length of stay, complication rates, or time to flatus/diet tolerance were noted. Plasma levels of the 4 proteins were similar postoperatively. Though insignificant, the WH group had less marked histologic changes on "end-of-case" peritoneal biopsies. CONCLUSION This study found significantly lower pain medication requirements for PODs 1 to 3 for the WH group; however, because there were no differences in the pains scores between the groups, firm conclusions regarding WH CO2 cannot be made.
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Affiliation(s)
- Elie Sutton
- 1 Mount Sinai West Hospital Center, New York, NY, USA.,2 Maimonides Medical Center, Brooklyn, NY, USA
| | | | | | | | - Xiaohong Yan
- 1 Mount Sinai West Hospital Center, New York, NY, USA
| | - Vesna Cekic
- 1 Mount Sinai West Hospital Center, New York, NY, USA
| | - Linda Njoh
- 1 Mount Sinai West Hospital Center, New York, NY, USA
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Dean M, Ramsay R, Heriot A, Mackay J, Hiscock R, Lynch AC. Warmed, humidified CO 2 insufflation benefits intraoperative core temperature during laparoscopic surgery: A meta-analysis. Asian J Endosc Surg 2017; 10:128-136. [PMID: 27976517 PMCID: PMC5484286 DOI: 10.1111/ases.12350] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 10/05/2016] [Accepted: 10/16/2016] [Indexed: 01/05/2023]
Abstract
BACKGROUND Intraoperative hypothermia is linked to postoperative adverse events. The use of warmed, humidified CO2 to establish pneumoperitoneum during laparoscopy has been associated with reduced incidence of intraoperative hypothermia. However, the small number and variable quality of published studies have caused uncertainty about the potential benefit of this therapy. This meta-analysis was conducted to specifically evaluate the effects of warmed, humidified CO2 during laparoscopy. METHODS An electronic database search identified randomized controlled trials performed on adults who underwent laparoscopic abdominal surgery under general anesthesia with either warmed, humidified CO2 or cold, dry CO2 . The main outcome measure of interest was change in intraoperative core body temperature. RESULTS The database search identified 320 studies as potentially relevant, and of these, 13 met the inclusion criteria and were included in the analysis. During laparoscopic surgery, use of warmed, humidified CO2 is associated with a significant increase in intraoperative core temperature (mean temperature change, 0.3°C), when compared with cold, dry CO2 insufflation. CONCLUSION: Warmed, humidified CO2 insufflation during laparoscopic abdominal surgery has been demonstrated to improve intraoperative maintenance of normothermia when compared with cold, dry CO2.
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Affiliation(s)
- Meara Dean
- Epworth HealthCareMelbourneVictoriaAustralia
| | - Robert Ramsay
- Division of Cancer SurgeryPeter MacCallum Cancer CentreMelbourneVictoriaAustralia,Sir Peter MacCallum Department of OncologyUniversity of MelbourneMelbourneVictoriaAustralia
| | - Alexander Heriot
- Division of Cancer SurgeryPeter MacCallum Cancer CentreMelbourneVictoriaAustralia,Department of Surgery, St Vincent's HospitalUniversity of MelbourneMelbourneVictoriaAustralia
| | - John Mackay
- Epworth HealthCareMelbourneVictoriaAustralia
| | | | - A. Craig Lynch
- Epworth HealthCareMelbourneVictoriaAustralia,Division of Cancer SurgeryPeter MacCallum Cancer CentreMelbourneVictoriaAustralia,Department of Surgery, St Vincent's HospitalUniversity of MelbourneMelbourneVictoriaAustralia
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Birch DW, Dang JT, Switzer NJ, Manouchehri N, Shi X, Hadi G, Karmali S. Heated insufflation with or without humidification for laparoscopic abdominal surgery. Cochrane Database Syst Rev 2016; 10:CD007821. [PMID: 27760282 PMCID: PMC6464153 DOI: 10.1002/14651858.cd007821.pub3] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND Intraoperative hypothermia during both open and laparoscopic abdominal surgery may be associated with adverse events. For laparoscopic abdominal surgery, the use of heated insufflation systems for establishing pneumoperitoneum has been described to prevent hypothermia. Humidification of the insufflated gas is also possible. Past studies on heated insufflation have shown inconclusive results with regards to maintenance of core temperature and reduction of postoperative pain and recovery times. OBJECTIVES To determine the effect of heated gas insufflation compared to cold gas insufflation on maintaining intraoperative normothermia as well as patient outcomes following laparoscopic abdominal surgery. SEARCH METHODS We searched Cochrane Colorectal Cancer Specialised Register (September 2016), the Cochrane Central Register of Controlled Trials (CENTRAL; The Cochrane Library 2016, Issue 8), Ovid MEDLINE (1950 to September 2016), Ovid Embase (1974 to September 2016), International Pharmaceutical Abstracts (IPA) (September 2016), Web of Science (1985 to September 2016), Scopus, www.clinicaltrials.gov and the National Research Register (1956 to September 2016). We also searched grey literature and cross references. Searches were limited to human studies without language restriction. SELECTION CRITERIA Only randomised controlled trials comparing heated (with or without humidification) with cold gas insufflation in adult and paediatric populations undergoing laparoscopic abdominal procedures were included. We assessed study quality in regards to relevance, design, sequence generation, allocation concealment, blinding, possibility of incomplete data and selective reporting. Two review authors independently selected studies for the review, with any disagreement resolved in consensus with a third co-author. DATA COLLECTION AND ANALYSIS Two review authors independently performed screening of eligible studies, data extraction and methodological quality assessment of the trials. We classified a study as low-risk of bias if all of the first six main criteria indicated in the 'Risk of Bias Assessment' table were assessed as low risk. We used data sheets to collect data from eligible studies. We presented results using mean differences for continuous outcomes and relative risks for dichotomous outcomes, with 95% confidence intervals. We used Review Manager (RevMan) 5.3 software to calculate the estimated effects. We took publication bias into consideration and compiled funnel plots. MAIN RESULTS We included 22 studies in this updated analysis, including six new trials with 584 additional participants, resulting in a total of 1428 participants. The risk of bias was low in 11 studies, high in one study and unclear in the remaining studies, due primarily to failure to report methodology for randomisation, and allocation concealment or blinding, or both. Fourteen studies examined intraoperative core temperatures among heated and humidified insufflation cohorts and core temperatures were higher compared to cold gas insufflation (MD 0.31 °C, 95% CI, 0.09 to 0.53, I2 = 88%, P = 0.005) (low-quality evidence). If the analysis was limited to the eight studies at low risk of bias, this result became non-significant but remained heterogeneous (MD 0.18 °C, 95% CI, -0.04 to 0.39, I2= 81%, P = 0.10) (moderate-quality evidence).In comparison to the cold CO2 group, the meta-analysis of the heated, non-humidified group also showed no statistically significant difference between groups. Core temperature was statistically, significantly higher in the heated, humidified CO2 with external warming groups (MD 0.29 °C, 95% CI, 0.05 to 0.52, I2 = 84%, P = 0.02) (moderate-quality evidence). Despite the small difference in temperature of 0.31 °C with heated CO2, this is unlikely to be of clinical significance.For postoperative pain scores, there were no statistically significant differences between heated and cold CO2, either overall, or for any of the subgroups assessed. Interestingly, morphine-equivalent use was homogeneous and higher in heated, non-humidified insufflation compared to cold insufflation for postoperative day one (MD 11.93 mg, 95% CI 0.92 to 22.94, I2 = 0%, P = 0.03) (low-quality evidence) and day two (MD 9.79 mg, 95% CI 1.58 to 18.00, I2 = 0%, P = 0.02) (low-quality evidence). However, morphine use was not significantly different six hours postoperatively or in any humidified insufflation groups.There was no apparent effect on length of hospitalisation, lens fogging or length of operation with heated compared to cold gas insufflation, with or without humidification. Recovery room time was shorter in the heated cohort (MD -26.79 minutes, 95% CI -51.34 to -2.25, I2 = 95%, P = 0.03) (low-quality evidence). When the one and only unclear-risk study was removed from the analysis, the difference in recovery-room time became non-significant and the studies were statistically homogeneous (MD -1.22 minutes, 95% CI, -6.62 to 4.17, I2 = 12%, P = 0.66) (moderate-quality evidence).There were also no differences in the frequency of major adverse events that occurred in the cold or heated cohorts.These results should be interpreted with caution due to some limitations. Heterogeneity of core temperature remained significant despite subgroup analysis, likely due to variations in the study design of the individual trials, as the trials had variations in insufflation gas temperatures (35 ºC to 37 ºC), humidity ranges (88% to 100%), gas volumes and location of the temperature probes. Additionally, some of the trials lacked specific study design information making evaluation difficult. AUTHORS' CONCLUSIONS While heated, humidified gas leads to mildly smaller decreases in core body temperatures, clinically this does not account for improved patient outcomes, therefore, there is no clear evidence for the use of heated gas insufflation, with or without humidification, compared to cold gas insufflation in laparoscopic abdominal surgery.
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Affiliation(s)
- Daniel W Birch
- University of AlbertaCenter for the Advancement of Minimally Invasive Surgery, Department of SurgeryRoyal Alexandra Hospital, Rm. 418 CSC, 10240 Kingsway AveEdmontonABCanadaT5H 3V9
| | - Jerry T Dang
- University of AlbertaCenter for the Advancement of Minimally Invasive Surgery, Department of SurgeryRoyal Alexandra Hospital, Rm. 418 CSC, 10240 Kingsway AveEdmontonABCanadaT5H 3V9
| | - Noah J Switzer
- University of AlbertaCenter for the Advancement of Minimally Invasive Surgery, Department of SurgeryRoyal Alexandra Hospital, Rm. 418 CSC, 10240 Kingsway AveEdmontonABCanadaT5H 3V9
| | - Namdar Manouchehri
- University of AlbertaCenter for the Advancement of Minimally Invasive Surgery, Department of SurgeryRoyal Alexandra Hospital, Rm. 418 CSC, 10240 Kingsway AveEdmontonABCanadaT5H 3V9
| | - Xinzhe Shi
- Royal Alexandra HospitalCenter for the Advancement of Minimally Invasive Surgery, Department of SurgeryEdmontonABCanadaT5H 3V9
| | - Ghassan Hadi
- University of AlbertaCenter for the Advancement of Minimally Invasive Surgery, Department of SurgeryRoyal Alexandra Hospital, Rm. 418 CSC, 10240 Kingsway AveEdmontonABCanadaT5H 3V9
| | - Shahzeer Karmali
- University of AlbertaCenter for the Advancement of Minimally Invasive Surgery, Department of SurgeryRoyal Alexandra Hospital, Rm. 418 CSC, 10240 Kingsway AveEdmontonABCanadaT5H 3V9
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Balayssac D, Pereira B, Bazin JE, Le Roy B, Pezet D, Gagnière J. Warmed and humidified carbon dioxide for abdominal laparoscopic surgery: meta-analysis of the current literature. Surg Endosc 2016; 31:1-12. [PMID: 27005288 DOI: 10.1007/s00464-016-4866-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 03/09/2016] [Indexed: 01/01/2023]
Abstract
BACKGROUND The creation of a pneumoperitoneum for laparoscopic surgery is performed by the insufflation of carbon dioxide (CO2). The insufflated CO2 is generally at room temperature (20-25 °C) and dry (0-5 % relative humidity). However, these physical characteristics could lead to alterations of the peritoneal cavity, leading to operative and postoperative complications. Warming and humidifying the insufflated gas has been proposed to reduce the iatrogenic effects of laparoscopic surgery, such as pain, hypothermia and peritoneal alterations. Two medical devices are currently available for laparoscopic surgery with warm and humidified CO2. METHODS Clinical studies were identified by searching PubMed with keywords relating to humidified and warmed CO2 for laparoscopic procedures. Analysis of the literature focused on postoperative pain, analgesic consumption, duration of hospital stay and convalescence, surgical techniques and hypothermia. RESULTS Bibliographic analyses reported 114 publications from 1977 to 2015, with only 17 publications of clinical interest. The main disciplines focused on were gynaecological and digestive surgery ). Analysis of the studies selected reported only a small beneficial effect of warmed and humidified laparoscopy compared to standard laparoscopy on immediate postoperative pain and per procedure hypothermia. No difference was observed for later postoperative shoulder pain, morphine equivalent daily doses, postoperative body core temperature, recovery room and hospital length of stay, lens fogging and procedure duration. CONCLUSIONS Only few beneficial effects on immediate postoperative pain and core temperature have been identified in this meta-analysis. Although more studies are probably needed to close the debate on the real impact of warmed and humidified CO2 for laparoscopic procedures.
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Affiliation(s)
- David Balayssac
- Délégation à la Recherche Clinique et à l'Innovation, CHU de Clermont-Ferrand, Villa annexe IFSI, 58, rue Montalembert, 63003, Clermont-Ferrand Cedex, France. .,Faculté de Médecine et de Pharmacie, Clermont Université, 63001, Clermont-Ferrand, France. .,INSERM, U1107, 63000, Clermont-Ferrand, France.
| | - Bruno Pereira
- Délégation à la Recherche Clinique et à l'Innovation, CHU de Clermont-Ferrand, Villa annexe IFSI, 58, rue Montalembert, 63003, Clermont-Ferrand Cedex, France
| | - Jean-Etienne Bazin
- Délégation à la Recherche Clinique et à l'Innovation, CHU de Clermont-Ferrand, Villa annexe IFSI, 58, rue Montalembert, 63003, Clermont-Ferrand Cedex, France.,Faculté de Médecine et de Pharmacie, Clermont Université, 63001, Clermont-Ferrand, France.,Anesthésie Réanimation, CHU de Clermont-Ferrand, 63058, Clermont-Ferrand, France
| | - Bertrand Le Roy
- Chirurgie Digestive, CHU de Clermont-Ferrand, 63058, Clermont-Ferrand, France
| | - Denis Pezet
- Délégation à la Recherche Clinique et à l'Innovation, CHU de Clermont-Ferrand, Villa annexe IFSI, 58, rue Montalembert, 63003, Clermont-Ferrand Cedex, France.,Faculté de Médecine et de Pharmacie, Clermont Université, 63001, Clermont-Ferrand, France.,Chirurgie Digestive, CHU de Clermont-Ferrand, 63058, Clermont-Ferrand, France
| | - Johan Gagnière
- Chirurgie Digestive, CHU de Clermont-Ferrand, 63058, Clermont-Ferrand, France
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Binda MM. Humidification during laparoscopic surgery: overview of the clinical benefits of using humidified gas during laparoscopic surgery. Arch Gynecol Obstet 2015; 292:955-71. [PMID: 25911545 PMCID: PMC4744605 DOI: 10.1007/s00404-015-3717-y] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 04/02/2015] [Indexed: 12/21/2022]
Abstract
PURPOSE The peritoneum is the serous membrane that covers the abdominal cavity and most of the intra-abdominal organs. It is a very delicate layer highly susceptible to damage and it is not designed to cope with variable conditions such as the dry and cold carbon dioxide (CO2) during laparoscopic surgery. The aim of this review was to evaluate the effects caused by insufflating dry and cold gas into the abdominal cavity after laparoscopic surgery. METHODS A literature search using the Pubmed was carried out. Articles identified focused on the key issues of laparoscopy, peritoneum, morphology, pneumoperitoneum, humidity, body temperature, pain, recovery time, post-operative adhesions and lens fogging. RESULTS Insufflating dry and cold CO2 into the abdomen causes peritoneal damage, post-operative pain, hypothermia and post-operative adhesions. Using humidified and warm gas prevents pain after surgery. With regard to hypothermia due to desiccation, it can be fully prevented using humidified and warm gas. Results relating to the patient recovery are still controversial. CONCLUSIONS The use of humidified and warm insufflation gas offers a significant clinical benefit to the patient, creating a more physiologic peritoneal environment and reducing the post-operative pain and hypothermia. In animal models, although humidified and warm gas reduces post-operative adhesions, humidified gas at 32 °C reduced them even more. It is clear that humidified gas should be used during laparoscopic surgery; however, a question remains unanswered: to achieve even greater clinical benefit to the patient, at what temperature should the humidified gas be when insufflated into the abdomen? More clinical trials should be performed to resolve this query.
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Affiliation(s)
- Maria Mercedes Binda
- Institut de Recherche Expérimentale et Clinique (IREC), Pôle de Gynécologie, Avenue Mounier 52, bte B1.52.02, 1200, Brussels, Belgium.
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Cai W, Dong F, Wang Z, Yang X, Zheng M, Che X. Heated and humidified CO2pneumoperitoneum inhibits tumour cell proliferation, migration and invasion in colon cancer. Int J Hyperthermia 2014; 30:201-9. [DOI: 10.3109/02656736.2014.898339] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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Challenges in the optimisation of post-operative pain management with opioids in obese patients: a literature review. Obes Surg 2014; 23:1458-75. [PMID: 23700237 DOI: 10.1007/s11695-013-0998-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An increasing number of obese patients are undergoing surgery, particularly bariatric and orthopaedic surgery. The physiological differences between obese and normal-weight subjects may modify not only anaesthetic requirements during surgery but also post-operative analgesic management, raising a number of challenges in a critical period. In this review, we analyse studies of post-operative pain management with opioids in obese subjects. We discuss the genetic factors common to pain and obesity and the factors potentially modifying opioid pharmacokinetics and pharmacodynamics in obese patients, and we analyse the overall efficacy and safety of opioids for pain management during the post-operative period in obese patients. Both modifications to surgical methods and additional analgesic treatments to decrease the requirement for opioids may improve early rehabilitation and quality of care and reduce adverse effects in obese patients.
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Chan CP, Wang BY, Cheng CY, Lin CH, Hsieh MC, Tsou JJ, Lee WJ. Randomized Controlled Trials in Bariatric Surgery. Obes Surg 2012; 23:118-30. [DOI: 10.1007/s11695-012-0798-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Abstract
Enhanced recovery after surgery (ERAS) programs have been shown to minimise morbidity in other types of surgery, but comparatively less data exist investigating ERAS in bariatric surgery. This article reviews the existing literature to identify interventions which may be included in an ERAS program for bariatric surgery. A narrative literature review was conducted. Search terms included 'bariatric surgery', 'weight loss surgery', 'gastric bypass', 'ERAS', 'enhanced recovery', 'enhanced recovery after surgery', 'fast-track surgery', 'perioperative care', 'postoperative care', 'intraoperative care' and 'preoperative care'. Interventions recovered by the database search, as well as interventions garnered from clinical experience in ERAS, were used as individual search terms. A large volume of evidence exists detailing the role of multiple interventions in perioperative care. However, efficacy and safety for a proportion of these interventions for ERAS in bariatric surgery remain unclear. This review concludes that there is potential to implement ERAS programs in bariatric surgery.
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Arung W, Drion P, Cheramy JP, Honoré P, Meurisse M, Defraigne JO, Detry O. Intraperitoneal adhesions after open or laparoscopic abdominal procedure: an experimental study in the rat. J Laparoendosc Adv Surg Tech A 2012; 22:651-7. [PMID: 22746150 DOI: 10.1089/lap.2012.0102] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Adhesion formation is common after abdominal surgery. The incidence and severity of adhesion formation following open or laparoscopic surgery remain controversial. The role of CO(2) pneumoperitoneum is also widely discussed. This study aimed to compare adhesion formation following peritoneal injury by electrocoagulation performed through open or laparoscopic procedures in a rat model. MATERIALS AND METHODS Sixty male rats were randomized to undergo a 1.5-cm peritoneal injury with unipolar cautery under general anesthesia: open surgery (Group A, n=20), laparoscopic surgery with CO(2) pneumoperitoneum (Group B, n=20), and laparoscopic surgery with air pneumoperitoneum (Group C, n=20). Duration of the procedures was fixed at 90 minutes in all groups, and pneumoperitoneum pressure was kept at 10 mm Hg. Ten days later, the animals underwent a secondary laparotomy to score peritoneal adhesions using qualitative and quantitative parameters. RESULTS Forty-five rats developed at least one adhesion: 95% in Group A, 83% in Group B, and 55% in Group C (P<.01; Group C versus Group A, P<.01). According to number, thickness, tenacity, vascularization, extent, type, and grading according to the Zühkle classification, no significant difference was observed between Groups A and B. The distribution of adhesions after open surgery was significantly different than after laparoscopic surgery (P<.001). It is interesting that Group C rats developed significantly fewer adhesions at the traumatized site, and their adhesions had less severe qualitative scores compared with those after open surgery (P<.01). CONCLUSIONS In this animal model, CO(2) laparoscopic surgery did not decrease the formation of postoperative adhesion, compared with open surgery. The difference with the animals operated on with air pneumoperitoneum emphasizes the role of CO(2) in peritoneal injury leading to adhesion formation.
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Affiliation(s)
- Willy Arung
- Department of General Surgery, University of Lubumbashi Clinics, University of Lubumbashi, Lubumbashi, Katanga Province, Democratic Republic of Congo
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Heat loss during carbon dioxide insufflation: comparison of a nebulization based humidification device with a humidification and heating system. Surg Endosc 2012; 26:3622-5. [DOI: 10.1007/s00464-012-2385-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Accepted: 05/14/2012] [Indexed: 11/26/2022]
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16
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Birch DW, Manouchehri N, Shi X, Hadi G, Karmali S. Heated CO(2) with or without humidification for minimally invasive abdominal surgery. Cochrane Database Syst Rev 2011:CD007821. [PMID: 21249696 DOI: 10.1002/14651858.cd007821.pub2] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Intraoperative hypothermia during both open and laparoscopic abdominal surgery may be associated with adverse events. For laparoscopic abdominal surgery, the use of heated insufflation systems for establishing pneumoperitoneum has been described to prevent hypothermia. Humidification of the insufflated gas is also possible. Past studies have shown inconclusive results with regards to maintenance of core temperature and reduction of postoperative pain and recovery times. OBJECTIVES To determine the effect of heated gas insufflation on patient outcomes following minimally invasive abdominal surgery. SEARCH STRATEGY The Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library), MEDLINE (PubMed), EMBASE, International Pharmaceutical Abstracts (IPA), Web of Science, Scopus, www.clinicaltrials.gov and the National Research Register were searched (1956 to 14 June 2010). Grey literature and cross-references were also searched. Searches were limited to human studies without language restriction. SELECTION CRITERIA All included studies were randomized trials comparing heated (with or without humidification) gas insufflation with cold gas insufflation in adult and pediatric populations undergoing minimally invasive abdominal procedures. Study quality was assessed in regards to relevance, design, sequence generation, allocation concealment, blinding, possibility of incomplete data and selective reporting. The selection of studies for the review was done independently by two authors, with any disagreement resolved in consensus with a third co-author. DATA COLLECTION AND ANALYSIS Screening of eligible studies, data extraction and methodological quality assessment of the trials were performed by the authors. Data from eligible studies were collected using data sheets. Results were presented using mean differences for continuous outcomes and relative risks with 95% confidence intervals for dichotomous outcomes. The estimated effects were calculated using the latest version of RevMan software. Publication bias was taken into consideration and funnel plots were compiled. MAIN RESULTS Sixteen studies were included in the analysis. During laparoscopic abdominal surgery, no effect on postoperative pain nor changes in core temperature, morphine consumption, length of hospitalisation, lens fogging, length of operation or recovery room stay were associated with heated compared to cold gas insufflation with or without humidification. AUTHORS' CONCLUSIONS The study offers evidence that during laparoscopic abdominal surgery, heated gas insufflation, with or without humidification, has minimal benefit on patient outcomes.
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Affiliation(s)
- Daniel W Birch
- Center for the Advancement of Minimally Invasive Surgery, Department of Surgery, University of Alberta, Edmonton, AB, Canada, T5H 3V9
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Savel RH. The multidisciplinary nature of critical care: living the dream. Am J Crit Care 2010; 19:480-2. [PMID: 21041191 DOI: 10.4037/ajcc2010711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Richard H. Savel
- Richard H. Savel is the medical codirector of the surgical intensive care unit at Montefiore Medical Center and an associate professor of clinical medicine and neurology at the Albert Einstein College of Medicine, both in New York City
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18
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Warming and Humidification of Insufflation Carbon Dioxide in Laparoscopic Colonic Surgery. Ann Surg 2010; 251:1024-33. [DOI: 10.1097/sla.0b013e3181d77a25] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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La Colla L, Mangano A, Albertin A. Continuous infusion of intraperitoneal bupivacaine after laparoscopic surgery: a randomized controlled trial--what about statistical power and analysis? Obes Surg 2009; 19:817-8; author reply 819. [PMID: 19306051 DOI: 10.1007/s11695-009-9826-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Accepted: 03/10/2009] [Indexed: 11/29/2022]
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20
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La Colla L, Mangano A, Albertin A. Beneficial effects of humidified, warmed carbon dioxide insufflation during laparoscopic bariatric surgery: a randomized clinical trial. What if sample size calculation made difference? Obes Surg 2009; 20:1747. [PMID: 19277800 DOI: 10.1007/s11695-009-9815-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Accepted: 02/23/2009] [Indexed: 11/25/2022]
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Effect of Heated and Humidified Carbon Dioxide on Patients After Laparoscopic Procedures. Surg Laparosc Endosc Percutan Tech 2008; 18:539-46. [DOI: 10.1097/sle.0b013e3181886ff4] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Sherwinter DA, Ghaznavi AM, Spinner D, Savel RH, Macura JM, Adler H. Continuous Infusion of Intraperitoneal Bupivacaine after Laparoscopic Surgery: A Randomized Controlled Trial. Obes Surg 2008; 18:1581-6. [PMID: 18648895 DOI: 10.1007/s11695-008-9628-2] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2008] [Accepted: 06/25/2008] [Indexed: 11/26/2022]
Affiliation(s)
- Danny A Sherwinter
- Department of Minimally Invasive Surgery, Maimonides Medical Center, Brooklyn, NY 11219, USA.
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23
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Sammour T, Kahokehr A, Hill AG. Meta-analysis of the effect of warm humidified insufflation on pain after laparoscopy. Br J Surg 2008; 95:950-6. [DOI: 10.1002/bjs.6304] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Abstract
Background
Studies on the use of warmed and humidified insufflation (WHI) in laparoscopic abdominal procedures to reduce pain have been inconclusive owing to small sample sizes.
Methods
An electronic database search identified all randomized controlled trials (RCTs) on adults undergoing elective laparoscopic abdominal surgery under general anaesthesia in which the exposure group had WHI and the control group had standard cold and dry carbon dioxide. The outcome measure was pain by visual analogue score or morphine usage.
Results
Seven RCTs were included. Patients in the WHI group experienced a significant reduction in pain score at 6 h (P = 0·006), 1 day (P = 0·010) and 3 days (P < 0·001) after operation, and in morphine usage on day 2 (P = 0·040).
Conclusion
WHI reduces pain after laparoscopy.
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Affiliation(s)
- T Sammour
- Department of Surgery, South Auckland Clinical School, University of Auckland, New Zealand
| | - A Kahokehr
- Department of Surgery, South Auckland Clinical School, University of Auckland, New Zealand
| | - A G Hill
- Department of Surgery, South Auckland Clinical School, Middlemore Hospital, Auckland, New Zealand
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Heated and humidified CO2 prevents hypothermia, peritoneal injury, and intra-abdominal adhesions during prolonged laparoscopic insufflations. J Surg Res 2008; 151:40-7. [PMID: 18639246 DOI: 10.1016/j.jss.2008.03.039] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2007] [Revised: 03/04/2008] [Accepted: 03/27/2008] [Indexed: 12/15/2022]
Abstract
BACKGROUND Insufflation with standard cold-dry CO(2) during laparoscopic surgery has been shown to predispose patients to hypothermia and peritoneal injury. This study aimed to compare the effect of prolonged cold-dry CO(2) insufflation with heated-humidified CO(2) insufflation (3-5 h) on hypothermia, peritoneal damage, and intra-abdominal adhesion formation in a rat model. MATERIALS AND METHODS A total of 160 Wistar rats were randomized to undergo no insufflation or insufflation with cold-dry CO(2) (21 degrees C, <1% relative humidity) or heated-humidified CO(2) (37 degrees C, 95% relative humidity) for 3, 4, or 5 h. Core body temperature was measured via rectum before and during insufflations. Peritoneal samples were taken at 6, 24, 48, and 96 h after treatments and analyzed with light microscopy and scanning electron microscopy. Intra-abdominal adhesions were evaluated 2 weeks later. RESULTS Core body temperature significantly decreased in the cold-dry group, whereas it was maintained and increased in the heated-humidified group. Scanning electron microscopy and light microscopy studies showed intense peritoneal injury in the cold-dry CO(2) group but significantly less damages in the heated-humidified group. Increased intra-abdominal adhesion formation was observed in the cold-dry CO(2) group, while no adhesions were found in the rats insufflated with heated-humidified CO(2). CONCLUSIONS Heated-humidified CO(2) insufflation results in significantly less hypothermia, less peritoneal damage, and decreased adhesion formation as compared with cold-dry CO(2) insufflation. Heated-humidified CO(2) may be more suitable for insufflation application in prolonged laparoscopic surgery.
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Schlotterbeck H, Schaeffer R, Dow WA, Diemunsch P. Cold nebulization used to prevent heat loss during laparoscopic surgery: an experimental study in pigs. Surg Endosc 2008; 22:2616-20. [DOI: 10.1007/s00464-008-9841-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2007] [Revised: 01/05/2008] [Accepted: 01/27/2008] [Indexed: 12/01/2022]
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Manwaring JM, Readman E, Maher PJ. The Effect of Heated Humidified Carbon Dioxide on Postoperative Pain, Core Temperature, and Recovery Times in Patients Having Laparoscopic Surgery: A Randomized Controlled Trial. J Minim Invasive Gynecol 2008; 15:161-5. [DOI: 10.1016/j.jmig.2007.09.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2007] [Revised: 09/07/2007] [Accepted: 09/15/2007] [Indexed: 11/30/2022]
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de Csepel J, Wilson E. Heating and humidifying carbon dioxide is indicated. Surg Endosc 2007; 21:340-1. [PMID: 17219294 DOI: 10.1007/s00464-006-0208-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2006] [Accepted: 04/11/2006] [Indexed: 12/31/2022]
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Frezza EE, Wachtel MS. Editorial comment. Surg Obes Relat Dis 2006. [DOI: 10.1016/j.soard.2006.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Champion JK, Williams M. Prospective randomized trial of heated humidified versus cold dry carbon dioxide insufflation during laparoscopic gastric bypass. Surg Obes Relat Dis 2006; 2:445-9; discussion 449-50. [PMID: 16925377 DOI: 10.1016/j.soard.2006.01.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2005] [Revised: 01/28/2006] [Accepted: 01/31/2006] [Indexed: 11/18/2022]
Abstract
BACKGROUND The replacement of cold dry carbon dioxide with heated humidified gas for insufflation during complex laparoscopic procedures has been reported to decrease hypothermia and peritoneal cell desiccation, with a resultant decrease in postoperative pain and narcotic use and a shortened recovery, but may prevent the paralysis of the peritoneal polymorphonuclear cell cytokine cascade and add to the cost of the procedure. We report our outcomes comparing carbon dioxide insufflation with different characteristics during laparoscopic gastric bypass. METHODS Fifty consecutive patients were randomized to undergo laparoscopic gastric bypass with either cold-dry or heated-humidified carbon dioxide insufflation. Statistical analysis of variance between groups was determined by Levine's t test with the Greenhouse-Geisser correction, at a significance level of P <.05. RESULTS The two groups were similar for preoperative gender, age, weight, body mass index, and baseline C-reactive protein. The intraoperative room and patient core temperature, liters of insufflation used, lens cleanings, operating time, recovery room time, and narcotics used were not significantly different. The postoperative subjective analog shoulder pain score was significantly less (P = .025) for the heated-humidified group at 18 hours, but not at 6, 12, 24, or 48 hours. The abdominal pain scores and overall narcotic use, postoperative C-reactive protein, and length of stay were not significantly different between the two groups. CONCLUSION Heated-humidified insufflation resulted in a transient reduction in subjective shoulder pain at 18 hours postoperatively, but no reduction in abdominal pain or narcotics used. We were unable to verify any clinically significant difference between the two groups comparing heated-humidified and cold-dry insufflation after laparoscopic gastric bypass.
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Affiliation(s)
- J K Champion
- Department of Surgery, Emory-Dunwoody Medical Center, Atlanta, GA 30060, USA.
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Davis SS, Mikami DJ, Newlin M, Needleman BJ, Barrett MS, Fries R, Larson T, Dundon J, Goldblatt MI, Melvin WS. Heating and humidifying of carbon dioxide during pneumoperitoneum is not indicated. Surg Endosc 2005; 20:153-8. [PMID: 16333546 DOI: 10.1007/s00464-005-0271-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2005] [Accepted: 07/29/2005] [Indexed: 10/25/2022]
Abstract
BACKGROUND Carbon dioxide (CO2) pneumoperitoneum usually is created by a compressed gas source. This exposes the patient to cool dry gas delivered at room temperature (21 degrees C) with 0% relative humidity. Various delivery methods are available for humidifying and heating CO2 gas. This study was designed to determine the effects of heating and humidifying gas for the intraabdominal environment. METHODS For this study, 44 patients undergoing laparoscopic Roux-en-Y gastric bypass were randomly assigned to one of four arms in a prospective, randomized, single-blinded fashion: raw CO2 (group 1), heated CO2 (group 2), humidified CO2 (group 3), and heated and humidified CO2 (group 4). A commercially available CO2 heater-humidifier was used. Core temperatures, intraabdominal humidity, perioperative data, and postoperative outcomes were monitored. Peritoneal biopsies were taken in each group at the beginning and end of the case. Biopsies were subjected staining protocols designed to identify structural damage and macrophage activity. Postoperative narcotic use, pain scale scores, recovery room time, and length of hospital stay were recorded. One-way analysis of variance (ANOVA) and the nonparametric Kruskal-Wallis test were used to compare the groups. RESULTS Demographics, volume of CO2 used, intraabdominal humidity, bladder temperatures, lens fogging, and operative times were not significantly different between the groups. Core temperatures were stable, and intraabdominal humidity measurements approached 100% for all the patients over the entire procedure. Total narcotic dosage and pain scale scores were not statistically different. Recovery room times and length of hospital stay were similar in all the groups. Only one biopsy in the heated-humidified group showed an increase in macrophage activity. CONCLUSIONS The intraabdominal environment in terms of temperature and humidity was similar in all the groups. There was no significant difference in the intraoperative body temperatures or the postoperative variable measured. No histologic changes were identified. Heating or humidifying of CO2 is not justified for patients undergoing laparoscopic bariatric surgery.
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Affiliation(s)
- S S Davis
- Center for Minimally Invasive Surgery, Department of Surgery, Ohio State University, Columbus, OH 43210, USA
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