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Segal R, Mezzavia PM, Krieser RB, Sampurno S, Taylor M, Ramsay R, Kluger M, Lee K, Loh FL, Tatoulis J, O'Keefe M, Chen Y, Sindoni T, Ng I. Warm humidified CO2 insufflation improves pericardial integrity for cardiac surgery: a randomized control study. THE JOURNAL OF CARDIOVASCULAR SURGERY 2022; 63:369-375. [PMID: 35343658 DOI: 10.23736/s0021-9509.22.12004-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
BACKGROUND Flooding the surgical field with dry cold CO<inf>2</inf> during open-chamber cardiac surgery has been used to mitigate air entrainment into the systemic circulation. However, exposing epithelial surfaces to cold, dry gas causes tissue desiccation. This randomized controlled study was designed to investigate whether the use of humidified warm CO<inf>2</inf> insufflation into the cardiac cavity could reduce pericardial tissue damage and the incidence of micro-emboli when compared to dry cold CO<inf>2</inf> insufflation. METHODS Forty adult patients requiring elective open-chamber cardiac surgery were randomized to have either dry cold CO<inf>2</inf> insufflation via a standard catheter or humidified warm CO<inf>2</inf> insufflation via the HumiGard device (Fisher & Paykel Healthcare, Panmure, Auckland, New Zealand). The primary endpoint was biopsied pericardial tissue damage, assessed using electron microscopy. We assessed the percentage of microvilli and mesothelial damage, using a damage severity score (DSS) system. We compared the proportion of patients who had less damage, defined as DSS<2. Secondary endpoints included the severity of micro-emboli, by visual assessment of bubble load on transesophageal echocardiogram; lowest near infrared spectroscopy; total de-airing time; highest cardio-pulmonary bypass sweep speed; hospital length of stay and complications. RESULTS A higher proportion of patients in the humidified warm CO<inf>2</inf> group displayed conserved microvilli (47% vs. 11%, P=0.03) and preserved mesothelium (42% vs. 5%, P=0.02) compared to the control group. There were no differences in the secondary outcomes. CONCLUSIONS Humidified warm CO<inf>2</inf> insufflation significantly reduced pericardial epithelial damage when compared to dry cold CO<inf>2</inf> insufflation in open-chamber cardiac surgery. Further studies are warranted to investigate its potential clinical benefits.
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Affiliation(s)
- Reny Segal
- Department of Anesthesia and Pain Management, Royal Melbourne Hospital, Melbourne, Australia
- University of Melbourne, Melbourne, Australia
| | - Paul M Mezzavia
- Department of Anesthesia and Pain Management, Royal Melbourne Hospital, Melbourne, Australia
| | - Roni B Krieser
- Department of Anesthesia and Pain Management, Royal Melbourne Hospital, Melbourne, Australia
| | | | | | - Robert Ramsay
- University of Melbourne, Melbourne, Australia
- Peter MacCallum Cancer Centre, Melbourne, Australia
| | - Michael Kluger
- Department of Anesthesia and Pain Management, Royal Melbourne Hospital, Melbourne, Australia
| | - Keat Lee
- Department of Anesthesia and Pain Management, Royal Melbourne Hospital, Melbourne, Australia
- University of Melbourne, Melbourne, Australia
| | - Francis L Loh
- Department of Anesthesia and Pain Management, Royal Melbourne Hospital, Melbourne, Australia
| | - James Tatoulis
- Department of Anesthesia and Pain Management, Royal Melbourne Hospital, Melbourne, Australia
- University of Melbourne, Melbourne, Australia
| | - Michael O'Keefe
- Department of Anesthesia and Pain Management, Royal Melbourne Hospital, Melbourne, Australia
- University of Melbourne, Melbourne, Australia
| | - Yinwei Chen
- Department of Anesthesia and Pain Management, Royal Melbourne Hospital, Melbourne, Australia
| | - Teresa Sindoni
- Department of Anesthesia and Pain Management, Royal Melbourne Hospital, Melbourne, Australia
| | - Irene Ng
- Department of Anesthesia and Pain Management, Royal Melbourne Hospital, Melbourne, Australia -
- University of Melbourne, Melbourne, Australia
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Zizovic I, Trusek A, Tyrka M, Moric I, Senerovic L. Functionalization of polyamide microfiltration membranes by supercritical solvent impregnation. J Supercrit Fluids 2021. [DOI: 10.1016/j.supflu.2021.105250] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Polymeric Microfiltration Membranes Modification by Supercritical Solvent Impregnation-Potential Application in Open Surgical Wound Ventilation. Molecules 2021; 26:molecules26154572. [PMID: 34361725 PMCID: PMC8348072 DOI: 10.3390/molecules26154572] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 07/21/2021] [Accepted: 07/26/2021] [Indexed: 11/24/2022] Open
Abstract
This study investigated supercritical solvent impregnation of polyamide microfiltration membranes with carvacrol and the potential application of the modified membranes in ventilation of open surgical wounds. The impregnation process was conducted in batch mode at a temperature of 40 °C under pressures of 10, 15, and 20 MPa for contact times from 1 to 6 h. FTIR was applied to confirm the presence of carvacrol on the membrane surface. In the next step, the impact of the modification on the membrane structure was studied using scanning electron and ion beam microscopy and cross-filtration tests. Further, the release of carvacrol in carbon dioxide was determined, and finally, an open thoracic cavity model was applied to evaluate the efficiency of carvacrol-loaded membranes in contamination prevention. Carvacrol loadings of up to 43 wt.% were obtained under the selected operating conditions. The swelling effect was detectable. However, its impact on membrane functionality was minor. An average of 18.3 µg of carvacrol was released from membranes per liter of carbon dioxide for the flow of interest. Membranes with 30–34 wt.% carvacrol were efficient in the open thoracic cavity model applied, reducing the contamination levels by 27% compared to insufflation with standard membranes.
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Zizovic I, Tyrka M, Matyja K, Moric I, Senerovic L, Trusek A. Functional Modification of Cellulose Acetate Microfiltration Membranes by Supercritical Solvent Impregnation. Molecules 2021; 26:E411. [PMID: 33466808 PMCID: PMC7831027 DOI: 10.3390/molecules26020411] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 01/10/2021] [Accepted: 01/11/2021] [Indexed: 12/11/2022] Open
Abstract
This study investigates the modification of commercial cellulose acetate microfiltration membranes by supercritical solvent impregnation with thymol to provide them with antibacterial properties. The impregnation process was conducted in a batch mode, and the effect of pressure and processing time on thymol loading was followed. The impact of the modification on the membrane's microstructure was analyzed using scanning electron and ion-beam microscopy, and membranes' functionality was tested in a cross-flow filtration system. The antibiofilm properties of the obtained materials were studied against Staphyloccocus aureus and Pseudomonas aeruginosa, while membranes' blocking in contact with bacteria was examined for S. aureus and Escherichia coli. The results revealed a fast impregnation process with high thymol loadings achievable after just 0.5 h at 15 MPa and 20 MPa. The presence of 20% of thymol provided strong antibiofilm properties against the tested strains without affecting the membrane's functionality. The study showed that these strong antibacterial properties could be implemented to the commercial membranes' defined polymeric structure in a short and environmentally friendly process.
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Affiliation(s)
- Irena Zizovic
- Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland; (M.T.); (K.M.); (A.T.)
| | - Marcin Tyrka
- Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland; (M.T.); (K.M.); (A.T.)
| | - Konrad Matyja
- Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland; (M.T.); (K.M.); (A.T.)
| | - Ivana Moric
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11010 Belgrade, Serbia; (I.M.); (L.S.)
| | - Lidija Senerovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11010 Belgrade, Serbia; (I.M.); (L.S.)
| | - Anna Trusek
- Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland; (M.T.); (K.M.); (A.T.)
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Cheong JY, Chami B, Fong GM, Wang XS, Keshava A, Young CJ, Witting P. Randomized clinical trial of the effect of intraoperative humidified carbon dioxide insufflation in open laparotomy for colorectal resection. BJS Open 2019; 4:45-58. [PMID: 32011809 PMCID: PMC6996635 DOI: 10.1002/bjs5.50227] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 08/28/2019] [Indexed: 01/20/2023] Open
Abstract
Background Animal studies have shown that peritoneal injury can be minimized by insufflating the abdominal cavity with warm humidified carbon dioxide gas. Methods A single‐blind RCT was performed at a tertiary colorectal unit. Inclusion criteria were patient aged 18 years and over undergoing open elective surgery. The intervention group received warmed (37°C), humidified (98 per cent relative humidity) carbon dioxide (WHCO2 group). Multiple markers of peritoneal inflammation and oxidative damage were used to compare groups, including cytokines and chemokines, apoptosis, the 3‐chlorotyrosine/native tyrosine ratio, and light microscopy on peritoneal biopsies at the start (T0) and end (Tend) of the operation. Postoperative clinical outcomes were compared between the groups. Results Of 40 patients enrolled, 20 in the WHCO2 group and 19 in the control group were available for analysis. A significant log(Tend/T0) difference between control and WHCO2 groups was documented for interleukin (IL) 2 (5·3 versus 2·8 respectively; P = 0·028) and IL‐4 (3·5 versus 2·0; P = 0·041), whereas apoptosis assays documented no significant change in caspase activity, and similar apoptosis rates were documented along the peritoneal edge in both groups. The 3‐chlorotyrosine/tyrosine ratio had increased at Tend by 1·1‐fold in the WHCO2 group and by 3·1‐fold in the control group. Under light microscopy, peritoneum was visible in 11 of 19 samples from the control group and in 19 of 20 samples from the WHCO2 group (P = 0·006). The only difference in clinical outcomes between intervention and control groups was the number of days to passage of flatus (2·5 versus 5·0 days respectively; P = 0·008). Conclusion The use of warmed, humidified carbon dioxide appears to reduce some markers related to peritoneal oxidative damage during laparotomy. No difference was observed in clinical outcomes, but the study was underpowered for analysis of surgical results. Registration number: NCT02975947 (
http://www.clinicaltrials.gov/).
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Affiliation(s)
- J Y Cheong
- Colorectal Unit, Concord Repatriation General Hospital, Concord Clinical School, Concord, New South Wales, Australia.,Department of Pathology, Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - B Chami
- Department of Pathology, Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - G M Fong
- Department of Pathology, Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - X S Wang
- Department of Pathology, Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - A Keshava
- Colorectal Unit, Concord Repatriation General Hospital, Concord Clinical School, Concord, New South Wales, Australia
| | - C J Young
- Colorectal Unit, Concord Repatriation General Hospital, Concord Clinical School, Concord, New South Wales, Australia
| | - P Witting
- Department of Pathology, Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
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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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Baumann M, Cater JE. The Effect of Heated CO 2 Insufflation in Minimising Surgical Wound Contamination During Open Surgery. Ann Biomed Eng 2018; 46:1101-1111. [PMID: 29704185 DOI: 10.1007/s10439-018-2034-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 04/19/2018] [Indexed: 10/17/2022]
Abstract
The primary source of infections in open surgeries has been found to be bacteria and viruses carried into the surgical wound on the surfaces of skin particles shed by patients and surgical staff. In open cardiac surgeries, insufflation of the wound with carbon dioxide is used to limit the quantity of air able to enter into the heart, avoiding air embolisms when the heart is restarted. This surgical technique has been evaluated as a method of limiting the number of skin particles able to enter into the wound, using computational fluid dynamics (CFD) simulations and experimental testing. Spherical particles of 5.0 and 13.5 μm in diameter were used to simulate skin particles falling above a wound, travelling in air ventilation velocities of either 0.2 or 0.4 m/s, and with or without CO2 insufflation. The CFD simulations with CO2 included a diffuser placed in the wound and supplied with CO2 at a rate of 10 L/min. Experimental testing was completed under similar conditions. The results of CFD simulations and experimental testing showed CO2 insufflation can significantly limit the number of particles able to enter into the wound.
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Affiliation(s)
- Monika Baumann
- Fisher & Paykel Healthcare Ltd, 15 Maurice Paykel Pl, East Tamaki, Auckland, 2013, New Zealand
| | - John E Cater
- Department of Engineering Science, The University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand.
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Weinberg L, Huang A, Alban D, Jones R, Story D, McNicol L, Pearce B. Prevention of hypothermia in patients undergoing orthotopic liver transplantation using the humigard® open surgery humidification system: a prospective randomized pilot and feasibility clinical trial. BMC Surg 2017; 17:10. [PMID: 28114921 PMCID: PMC5260131 DOI: 10.1186/s12893-017-0208-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 01/16/2017] [Indexed: 12/15/2022] Open
Abstract
Background Perioperative thermal disturbances during orthotopic liver transplantation (OLT) are common. We hypothesized that in patients undergoing OLT the use of a humidified high flow CO2 warming system maintains higher intraoperative temperatures when compared to standardized multimodal strategies to maintain thermoregulatory homeostasis. Methods We performed a randomized pilot study in adult patients undergoing primary OLT. Participants were randomized to receive either open wound humidification with a high flow CO2 warming system in addition to standard care (Humidification group) or to standard care alone (Control group). The primary end point was nasopharyngeal core temperature measured 5 min immediately prior to reperfusion of the donor liver (Stage 3 − 5 min). Secondary endpoints included intraoperative PaCO2, minute ventilation and the use of vasoconstrictors. Results Eleven patients were randomized to each group. Both groups were similar for age, body mass index, MELD, SOFA and APACHE II scores, baseline temperature, and duration of surgery. Immediately prior to reperfusion (Stage 3 − 5 min) the mean (SD) core temperature was higher in the Humidification Group compared to the Control Group: 36.0 °C (0.13) vs. 35.4 °C (0.22), p = 0.028. Repeated measured ANOVA showed that core temperatures over time during the stages of the transplant were higher in the Humidification Group compared to the Control Group (p < 0.0001). There were no significant differences in the ETCO2, PaCO2, minute ventilation, or inotropic support. Conclusion The humidified high flow CO2 warming system was superior to standardized multimodal strategies in maintaining normothermia in patients undergoing OLT. Use of the device was feasible and did not interfere with any aspects of surgery. A larger study is needed to investigate if the improved thermoregulation observed is associated with improved patient outcomes. Trial registration ACTRN12616001631493. Retrospectively registered 25 November 2016.
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Affiliation(s)
- Laurence Weinberg
- Department of Surgery, and Anaesthesia Perioperative and Pain Medicine Unit, The University of Melbourne, Melbourne, Australia. .,Department of Anaesthesia, Austin Hospital, Heidelberg, Australia.
| | - Andrew Huang
- Department of Anaesthesia, Austin Hospital, Heidelberg, Australia
| | - Daniel Alban
- Department of Anaesthesia, Austin Hospital, Heidelberg, Australia
| | - Robert Jones
- Liver and Intestinal Transplant Unit, Austin Hospital and The University of Melbourne, Heidelberg, Australia
| | - David Story
- Perioperative and Pain Medicine Unit; The University of Melbourne, Victoria, Australia
| | - Larry McNicol
- Department of Surgery, and Anaesthesia Perioperative and Pain Medicine Unit, The University of Melbourne, Melbourne, Australia.,Department of Anaesthesia, Austin Hospital, Heidelberg, Australia
| | - Brett Pearce
- Department of Anaesthesia, Austin Hospital, Heidelberg, Australia
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Kokhanenko P, Papotti G, Cater JE, Lynch AC, van der Linden JA, Spence CJT. Carbon dioxide insufflation deflects airborne particles from an open surgical wound model. J Hosp Infect 2016; 95:112-117. [PMID: 27919430 DOI: 10.1016/j.jhin.2016.11.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 11/14/2016] [Indexed: 11/25/2022]
Abstract
BACKGROUND Surgical site infections remain a significant burden on healthcare systems and may benefit from new countermeasures. AIM To assess the merits of open surgical wound CO2 insufflation via a gas diffuser to reduce airborne contamination, and to determine the distribution of CO2 in and over a wound. METHODS An experimental approach with engineers and clinical researchers was employed to measure the gas flow pattern and motion of airborne particles in a model of an open surgical wound in a simulated theatre setting. Laser-illuminated flow visualizations were performed and the degree of protection was quantified by collecting and characterizing particles deposited in and outside the wound cavity. FINDINGS The average number of particles entering the wound with a diameter of <5μm was reduced 1000-fold with 10L/min CO2 insufflation. Larger and heavier particles had a greater penetration potential and were reduced by a factor of 20. The degree of protection was found to be unaffected by exaggerated movements of hands in and out of the wound cavity. The steady-state CO2 concentration within the majority of the wound cavity was >95% and diminished rapidly above the wound to an atmospheric level (∼0%) at a height of 25mm. CONCLUSION Airborne particles were deflected from entering the wound by the CO2 in the cavity akin to a protective barrier. Insufflation of CO2 may be an effective means of reducing intraoperative infection rates in open surgeries.
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Affiliation(s)
- P Kokhanenko
- Fisher & Paykel Healthcare Ltd, Auckland, New Zealand
| | - G Papotti
- Fisher & Paykel Healthcare Ltd, Auckland, New Zealand
| | - J E Cater
- Department of Engineering Science, University of Auckland, Auckland, New Zealand
| | - A C Lynch
- Department of Colorectal Surgery, Peter MacCallum Cancer Centre, Melbourne, Australia
| | - J A van der Linden
- Department of Cardiothoracic Surgery and Anesthesiology, Karolinska University Hospital, Karolinska Institute, Stockholm, Sweden
| | - C J T Spence
- Fisher & Paykel Healthcare Ltd, Auckland, New Zealand.
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de Vries A, Kuhry E, Mårvik R. Operative procedures in warm humidified air: Can it reduce adhesion formation? A randomized experimental rat model. INTERNATIONAL JOURNAL OF SURGERY OPEN 2016. [DOI: 10.1016/j.ijso.2016.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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de Vries A, Mårvik R, Kuhry E. To perform operative procedures in an optimized local atmosphere: can it reduce post-operative adhesion formation? Int J Surg 2013; 11:1118-22. [PMID: 24080114 DOI: 10.1016/j.ijsu.2013.09.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 09/10/2013] [Accepted: 09/12/2013] [Indexed: 01/12/2023]
Abstract
BACKGROUND Adhesion formation is a major problem following abdominal surgery as it creates a considerable economic burden in addition to an increased risk for complications. In the present study, an effort was made to reduce post-operative adhesion formation by creating an artificial atmosphere within and around the abdominal cavity during an open surgical procedure. METHODS 82 Wistar male rats (Clr:WI) (200 gr, 7 weeks) were randomized into two groups. The abdominal cavity of the control group was exposed to the normal atmosphere of the operating-theatre during surgery (21% O₂, 21 °C, 40-47% relative humidity (RH)), while the abdominal cavity of the study group was exposed to an artificial atmosphere during surgery (3-6% O₂, >75% CO₂, 95-100% RH, 37 °C). Adhesion induction consisted of a laparotomy along linea-alba, four lesions in the anterior abdominal-wall, blood from the tail vein dripped inside the abdominal cavity and exposure to the atmosphere around the wound by use of self-retaining retractors. In addition, a liquid-sample for quantitative bacteriologic cultivation and bacterial load (CFU/ml) calculation was taken just before closure. After 3 weeks the abdominal cavity was scored for the extent, tenacity and severity of adhesions before the rats were euthanized. The two-sample-Wilcoxon-rank-sum test was used in the analysis. RESULTS Highly significant differences in postoperative total adhesion score, extent-, severity- and tenacity-score were found (P < 0.01). No differences were found between the two groups regarding mean bacterial load (P > 0.05). CONCLUSIONS The rats exposed to the warmed and humidified artificial atmosphere consisting of more than 75% carbon dioxide and 3-4% oxygen during surgery had more severe and more post-operative adhesions compared to the rats that were exposed to the ambient air during surgery.
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Affiliation(s)
- Arild de Vries
- Norwegian University of Science and Technology (NTNU), Department of Cancer Research and Molecular Medicine, Trondheim, Norway.
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Intraoperative Local Insufflation of Warmed Humidified CO2 Increases Open Wound and Core Temperatures: A Randomized Clinical Trial. World J Surg 2012; 36:2567-75. [DOI: 10.1007/s00268-012-1735-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Persson M, van der Linden J. Intraoperative field flooding with warm humidified CO2 may help to prevent adhesion formation after open surgery. Med Hypotheses 2009; 73:521-3. [DOI: 10.1016/j.mehy.2009.06.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Revised: 05/28/2009] [Accepted: 06/04/2009] [Indexed: 11/29/2022]
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Persson M, van der Linden J. The potential use of carbon dioxide as a carrier gas for drug delivery into open wounds. Med Hypotheses 2009; 72:121-4. [DOI: 10.1016/j.mehy.2008.08.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2008] [Revised: 08/12/2008] [Accepted: 08/19/2008] [Indexed: 10/21/2022]
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Intraoperative CO2 insufflation can decrease the risk of surgical site infection. Med Hypotheses 2008; 71:8-13. [DOI: 10.1016/j.mehy.2007.12.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2007] [Revised: 12/12/2007] [Accepted: 12/12/2007] [Indexed: 11/23/2022]
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Fuentes JM, Hanly EJ, Aurora AR, De Maio A, Shih SP, Marohn MR, Talamini MA. CO2 abdominal insufflation pretreatment increases survival after a lipopolysaccharide-contaminated laparotomy. J Gastrointest Surg 2006; 10:32-8. [PMID: 16368488 DOI: 10.1016/j.gassur.2005.07.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2005] [Accepted: 07/01/2005] [Indexed: 01/31/2023]
Abstract
Carbon dioxide (CO(2))-pneumoperitoneum is known to favorably modify the systemic immune response during laparoscopic surgery. The presented studies were designed to determine whether treating animals with CO(2) abdominal insufflation before undergoing a lipopolysaccharide (LPS)-contaminated laparotomy would serve as "shock prophylaxis" and thus improve survival and attenuate cytokine production. Rats were randomized into five groups: CO(2)-pneumoperitoneum, helium-pneumoperitoneum, anesthesia control, laparotomy/LPS control, and LPS only control. Animals in the first four groups all received a laparotomy and a lethal dose of LPS. Immediately preceding their laparotomy, animals in the pneumoperitoneum groups received a 30-minute pretreatment of abdominal insufflation with either CO(2) or helium. The anesthesia control group received a 30-minute pretreatment of isoflurane. Animal mortality was then recorded during the ensuing 72 hours. Subsequently, a similar protocol was repeated for measurements of cytokines. CO(2)-pneumoperitoneum increased survival at 48 hours compared with LPS control (P <.05), and decreased interleukin-6 plasma levels at 2 hours (P <.05). Abdominal insufflation with CO(2) before the performance of a laparotomy contaminated with endotoxin increases survival and attenuates interleukin-6. The beneficial immune-modulating effects of CO(2)-pneumoperitoneum endure after abdominal insufflation. CO(2)-pneumoperitoneum pretreatment may improve outcomes among patients undergoing gastrointestinal surgery who are at high risk for abdominal fecal contamination.
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Affiliation(s)
- Joseph M Fuentes
- Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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