scholarly journals Investigating the partial pressure of carbon dioxide (CO2) in the respiratory gases in Laparoscopic Gallbladder Surgery and comparing it with Arterial Partial Pressure of Carbon Dioxide

2019 ◽  
Vol 5 (6) ◽  
Keyword(s):  
Carbon Dioxide ◽  
Partial Pressure ◽  
Arterial Partial Pressure ◽  
Gallbladder Surgery ◽  
Carbon Dioxide Co2 ◽  
Respiratory Gases

scholarly journals Investigating the partial pressure of carbon dioxide (CO2) in the respiratory gases in Laparoscopic Gallbladder Surgery and comparing it with Arterial Partial Pressure of Carbon Dioxide

2019 ◽  
Vol 5 (6) ◽  
Keyword(s):  
Carbon Dioxide ◽  
Laparoscopic Surgery ◽  
Partial Pressure ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Carbon Dioxide Pressure ◽  
Gallbladder Surgery ◽  
The Mean ◽  
Carbon Dioxide Co2 ◽  
Respiratory Gases

Objectives: The aim of this paper is determining the end-expiratory dioxide pressure in gallbladder laparoscopic surgery and compares it with the arterial carbon dioxide pressure. Methods: This cross-sectional study was performed on 30 patients undergoing laparoscopic cholecystectomy. At the beginning of operation, ABG sample was taken from the patient's radial artery before CO2 was injected into the abdomen. At the same time, CO2 was measured by a capnography device. At the end of surgery, ABG sample was prepared for the second time before CO2 was removed from the abdomen and CO2 was recorded simultaneously by capnography device. After collecting data from ABG samples, arterial PaCO2 was compared with those obtained from capnography device results and SPSS 16 software was used for data analysis. Results: The mean preoperative PaCO2 for laparoscopic (PaCO2-1) was 34.343 and the mean preoperative ETCO2 for laparoscopic (ETCO2-1) was 31.37. These values after laparoscopic surgery were 34.813 for PaCO2, 34.813 (PaCO2-2) and 33.13 (ETCO2-2). There was also a correlation between PaCO2-1 and ETCO2-1 results between PaCO2-2 and ETCO2-2, which was stronger between PaCO2-2 and ETCO2-2. Conclusion: There was a strong correlation between ETCO2 results from capnography and PaCO2 from ABG and to monitor carbon dioxide retention, capnography can be used as an alternative to ABG for laparoscopic gallbladder surgery patients.

scholarly journals Second-generation laryngeal mask airway as an alternative to endotracheal tube during prolonged laparoscopic abdominal surgery: a comparative analysis of intraoperative gas exchanges

2021 ◽  
Author(s):  
S Park ◽  
JE Lee ◽  
GS Choi ◽  
JM Kim ◽  
JS Ko ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Gas Exchange ◽  
Laryngeal Mask Airway ◽  
Abdominal Surgery ◽  
Partial Pressure ◽  
Endotracheal Tube ◽  
Second Generation ◽  
Laryngeal Mask ◽  
Arterial Partial Pressure ◽  
Prolonged Surgery

Introduction: Despite several advantages over endotracheal tube (ETT), laryngeal mask airway (LMA), which is used in emergencies under difficult airway maintenance conditions, is rarely utilized in prolonged surgery. We compared the variables representing intraoperative gas exchange with second-generation LMA and ETT during prolonged laparoscopic abdominal surgery. Methods: Prolonged surgery was defined as a surgery lasting more than 2 h. In total, 394 patients who underwent laparoscopic liver resection via either second-generation LMA or ETT were retrospectively analysed. Parameters including end-tidal pressure of carbon dioxide (ETCO2), tidal volume (TV), respiratory rate (RR), peak inspiratory pressure (PIP), arterial partial pressure of carbon dioxide (PaCO2), pH, and ratio of arterial partial pressure of oxygen to fractional inspired oxygen (PFR) during surgery were compared between the two groups. In addition, the incidence of postoperative pulmonary complications (PPC) including pulmonary aspiration was also compared. Results: The values of ETCO2, TV, RR and PIP during pneumoperitoneum were comparable between the two groups. Although PaCO2 at 2 h after induction was higher in patients with LMA (40.5 vs. 38.5 mmHg, p < 0.001), the pH and PFR values of the two groups were comparable. The incidence of PPC was not different. Conclusion: During prolonged laparoscopic abdominal surgery, the second-generation LMA facilitates adequate intraoperative gas exchange and represents an alternative to ETT.

Y-shaped catheter improves carbon dioxide clearance during apnoeic oxygenation in tracheal surgery

2019 ◽  
Vol 56 (2) ◽  
pp. 393-399
Author(s):  
Naoya Yokota ◽  
Tetsuhiko Go ◽  
Atsushi Fujiwara ◽  
Natsumi Matsuura ◽  
Hiroyasu Yokomise
Keyword(s):  
Carbon Dioxide ◽  
Partial Pressure ◽  
Pure Oxygen ◽  
Tracheal Resection ◽  
Tracheal Reconstruction ◽  
Tracheal Surgery ◽  
Co2 Partial Pressure ◽  
Catheter Group ◽  
Carbon Dioxide Co2 ◽  
Apnoeic Oxygenation

AbstractOBJECTIVESApnoeic oxygenation is a ventilation method in tracheal surgery, but has the disadvantage of causing progressive hypercapnia. The aim of this experimental study was to evaluate the efficacy of a Y-shaped catheter for the prevention of accumulation of carbon dioxide (CO2) in tracheal surgery.METHODSSurgery for tracheal resection and reconstruction was performed in 10 beagles under general anaesthesia. Before transecting the trachea, the dogs were hyperventilated for 10 min with pure oxygen. After the airway was opened, ventilation was maintained with a small catheter for apnoeic oxygenation for 30 min until the end of the tracheal reconstruction. Y-shaped catheters were used in 5 dogs and straight catheters were used in 5 dogs for oxygen insufflation. Haemodynamic values and blood gas values were evaluated and compared between the 2 groups.RESULTSThe mean elevation in the CO2 partial pressure value per minute from 5 min after the start of the procedure to the end of apnoeic oxygenation was 1.34 mmHg [95% confidence interval (CI) 1.00–1.68] in the Y-shaped catheter group and 2.03 mmHg (95% CI 1.54–2.53) in the straight catheter group (P < 0.018). The total CO2 partial pressure elevation value was 59.5 mmHg in the Y-shaped catheter group and 89.0 mmHg in the straight catheter group (P < 0.006). There were no significant differences in haemodynamic values between the 2 groups.CONCLUSIONSApnoeic oxygenation using a Y-shaped catheter represses the accumulation of CO2 compared with a straight catheter in canine tracheal resection–reconstruction surgery.

scholarly journals Effects of environmental factors on the methane and carbon dioxide fluxes at the middle of Three Gorges Reservoir

2021 ◽  
Author(s):  
Yu Qin ◽  
Yujia Gou ◽  
Zongtai Yu ◽  
Wei Tan
Keyword(s):  
Carbon Dioxide ◽  
Partial Pressure ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
Carbon Dioxide Fluxes ◽  
Ch4 Flux ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Carbon Dioxide Co2 ◽  
Water Gas

Abstract In recent years, scientists have paid special attention to the greenhouse gas emissions of the Three Gorges Reservoir. This study took Fuling to Wanzhou, which locate at the middle section of the Three Gorges Reservoir as the research locations. From August 2017 to August 2018, the partial pressure of carbon dioxide (CO2) and methane (CH4) and the flux of CO2 and CH4 at the water–gas interface were studied. Spearman's correlation between the partial pressure and discharge flux of CO2 and CH4 in water and environmental variables was analyzed. The research results showed that the variation of partial pressure and flux was consistent. At different sample locations, there was no statistical difference in CO2 and CH4 fluxes, but under different operating periods, the CO2 and CH4 fluxes were significantly different. The highest values happened during the drainage period as well as the low-water period, respectively. Total organic carbon and total nitrogen were significantly positively correlated, and dissolved oxygen was extremely negatively correlated. The high value of CH4 flux in the middle of the reservoir area was related to the spatial distribution of the sediment and the amount of sediment deposition.

Automated Detection of Gastric Luminal Partial Pressure of Carbon Dioxide during Cardiovascular Surgery Using the Tonocap

2000 ◽  
Vol 92 (1) ◽  
pp. 38-38 ◽  
Author(s):  
Elliott Bennett-Guerrero ◽  
Michael H. Panah ◽  
Carol A. Bodian ◽  
Blessy J. Methikalam ◽  
John R. Alfarone ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Partial Pressure ◽  
Postoperative Complication ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Automated System ◽  
Hospital Death ◽  
Published Data ◽  
Arterial Partial Pressure ◽  
Hemodynamic Variables

Background A new automated system of air tonometry (Tonocap; Datex Ohmeda, Helsinki, Finland) allows for frequent (every 15 min) measurement of gastric luminal partial pressure of carbon dioxide. Its use has not been described in cardiac surgical patients. Methods One hundred patients undergoing coronary artery bypass graft or cardiac valve surgery were enrolled in a prospective cohort study. After anesthetic induction and insertion of a TRIP NGS Catheter (Datex Ohmeda), measurements of gastric luminal partial pressure of carbon dioxide were obtained using the Tonocap, and gastric mucosal pH (pHi) was calculated. The main outcome measure was postoperative complication, defined as either in-hospital death or prolonged postoperative hospitalization (&gt; 14 days). Results Four patients (4%) died, all of multiple-system organ failure, one each on postoperative days 9, 26, 46, and 121. Postoperative complication occurred in 18 patients (18%), all of whom exhibited persistent dysfunction of at least one organ system. Perioperatively, an abnormal pHi (&lt; 7.32) and gastric luminal minus arterial partial pressure of carbon dioxide gap (&gt; 8 mmHg) occurred in 66% and 70% of patients, respectively. Predictors of postoperative complication included postoperative pHi (P = 0.001), gastric luminal partial pressure of carbon dioxide (P = 0.022), and gastric luminal minus arterial partial pressure of carbon dioxide gap (P = 0.013). In contrast, arterial base excess (P &gt; 0.4) and routinely measured hemodynamic variables (e.g., heart rate, blood pressure) were either less predictive compared with Tonocap-derived variables or not predictive. Conclusions Despite a low mortality rate, patients undergoing cardiac surgery exhibited high incidences of prolonged hospitalization and postoperative morbidity. The Tonocap was easy to use, particularly compared with saline tonometry. Several Tonocap-derived variables were predictive of postoperative complications consistent with previously published data using saline tonometry.

scholarly journals Changes in arterial partial pressure and end-expired pressure of carbon dioxide in prepubescent and adult bitches undergoing ovariohysterectomy by videolaparoscopy or conventional laparotomy

2018 ◽  
Vol 48 (10) ◽  
Author(s):  
Luciana Branquinho Queiroga ◽  
Gabriela Marques Sessegolo ◽  
Fabiane Reginatto dos Santos ◽  
Letícia Mendes Fratini ◽  
Verônica Santos Mombach ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Partial Pressure ◽  
Postoperative Period ◽  
Base Excess ◽  
Mild Hypertension ◽  
Peak Inspiratory Pressure ◽  
Arterial Partial Pressure ◽  
Significant Difference ◽  
The Difference ◽  
Age Range

ABSTRACT: This paper aimed to determine arterial partial pressure of carbon dioxide (PaCO2), end-expired CO2 pressure (ETCO2), and the difference between arterial and end-expired CO2 pressure (Pa - ETCO2) in prepubescent and adult bitches undergoing videolaparoscopic or conventional ovariohyterectomy (OH). Forty bitches were randomly assigned to four groups: Conventional Adult (CA), Conventional Pediatric (CP), Videolaparoscopic Adult (VA) and Videolaparoscopic Pediatric (VP). Pulse rate (PR), respiratory rate (RR), systolic, mean, and diastolic arterial pressures (SAP, MAP, DAP), ETCO2, peak inspiratory pressure (PIP), pH, arterial partial pressure of oxygen (PaO2), PaCO2, base excess (BE) and HCO3 - were measured. Based on the PaCO2 and ETCO2 values, Pa-ETCO2 was determined. There was no significant difference in PaCO2 between the VA (42.5±5.2 to 53.7±5.2) and VP (48.4±5.4 to55.4±5.7) groups. During the postoperative period, all groups presented with hypertension. However, mild hypertension (SAP 150 to 159mmHg) was observed in the VP group as compared to severe hypertension (SAP>180mmHg) in the CA group, suggesting that both the age range and videolaparoscopic OH are associated with lower levels of hypertension during the postoperative period in dogs.

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