Comparison of Oxidative Stress Changes in Different Ventilation Strategies During Gynecologic Laparoscopic Surgery
Ischemia-reperfusion injury resulted from pneumoperitoneum during laparoscopic surgery have been reported in some literatures. There are no studies investigating the time course of changes in oxidative stress markers in volume-controlled ventilation (VCV) and pressure-controlled ventilation (PCV) modes. The aim of this study is to compare the alterations in oxidative stress in two different ventilation strategies during gynecologic laparoscopic surgery.
Methods:
Fifty-two patients of ASA physical status I or II were randomly assigned to receive either VCV or PCV during laparoscopic gynecologic surgery. Blood gas analysis and ventilation variables were recorded 1 minute before (T1) and 1 hour after (T2) pneumoperitoneum. Blood samples for malondialdehyde (MDA) measurement were collected at seven points: 1 minute before (T1) and 1 hour after (T2) pneumoperitoneum; 30 minutes, 60 minutes, 90 minutes, and 120 minutes after deflation (T3~T6); and 24 hours after deflation (T7).
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Pneumoperitoneum during laparoscopic procedures greatly impairs splanchnic blood flow due to compression. Increased intra-abdominal pressure may elevate the diaphragm, increase intra-thoracic pressure, reduce functional residual capacity, and thus lead to atelectasis. In a collapsed lung, blood flow is decreased and reperfusion injury may subsequently occur during re-expansion of the lung. This ischemia-reperfusion injury results from the formation of reactive oxygen species (ROS), which are highly reactive intermediates of the oxygen metabolism. When there is an imbalance between ROS generation and removal by antioxidative mechanisms, oxidative stress occurs and eventually causes cellular and organ damage. Oxidative stress mediates tissue injury and may represent an important link between laparoscopy and clinical side effects. Malondialdehyde (MDA) is considered the most reliable marker of oxidative stress in the clinical setting. It is a breakdown product of lipid peroxidation in tissues. An elevated concentration of MDA reflects the level of lipid peroxidation.
Although there is abundant data comparing the effects of VCV and PCV during laparoscopic surgery, the time course of changes in oxidative stress in these two modes has not been elucidated. Therefore, the aim of this study was to compare the alterations of oxidative stress in two different ventilation modes, VCV and PCV, during gynecologic laparoscopic surgery. To this end, the investigators established a prospective randomized clinical study and measured the plasma levels of a lipid peroxidation marker at different stages.
Fifty-two patients of ASA physical status I or II were randomly assigned to receive either VCV or PCV during laparoscopic gynecologic surgery. During the operation, blood gas analysis and ventilation variables were recorded 1 minute before (T1) and 1 hour after (T2) the establishment of CO2 pneumoperitoneum in both groups. Blood samples for MDA measurement were collected at seven points: 1 minute before (T1) and 1 hour after (T2) pneumoperitoneum; at intervals of 30 minutes for 2 hours after the deflation of CO2 (T3~T6); and 24 hours after the deflation of CO2 (T7). The samples were immediately centrifuged (1000g, 10 minutes) and the supernatants were stored at -800C until further analysis, which took place within 1 week. The investigators assessed the quality of recovery from anesthesia using a nine-item quality of recovery score (QoR Score) before operation and 24 hours after the deflation of CO2.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
-
-
-
Taoyuan, Taiwan, 333
- Department of Anesthesiology, Chang Gung Memorial Hospital
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- aged between 20 and 70 years with a BMI < 30 kg/m2 scheduled for laparoscopic gynecologic surgery requiring at least 1 hour of pneumoperitoneum
Exclusion Criteria:
- cardiopulmonary disease and a history of sepsis or shock, findings suspicious of malignant disease, previous major abdominal operation, smoking, and recent antioxidant use (i.e. vitamins A, C and E).
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Forebyggelse
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Enkelt
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Aktiv komparator: Volume-controlled ventilation
Volume-controlled ventilation throughout the surgery
|
a tidal volume of 8 ml/kg
|
|
Aktiv komparator: Pressure-controlled ventilation
Pressure-controlled ventilation throughout the surgery
|
a peak airway pressure to maintain a tidal volume of 8 ml/kg
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
peak airway pressure
Tidsramme: 1 hour after the establishment of CO2 pneumoperitoneum
|
During surgery, CO2 pneumoperitoneum was induced with an intraabdominal pressure of 15 mmHg.
After one hour of pneumoperitoneum, ventilation variables were recorded.
|
1 hour after the establishment of CO2 pneumoperitoneum
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Tidsramme |
|---|---|
|
plasma MDA concentration
Tidsramme: 1 minute before (T1) and 1 hour after (T2) pneumoperitoneum; at intervals of 30 minutes for 2 hours after the deflation of CO2 (T3~T6); and 24 hours after the deflation of CO2 (T7)
|
1 minute before (T1) and 1 hour after (T2) pneumoperitoneum; at intervals of 30 minutes for 2 hours after the deflation of CO2 (T3~T6); and 24 hours after the deflation of CO2 (T7)
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Chia-Chih Liao, MD, Chang Gung Memorial Hospital
Publikationer og nyttige links
Generelle publikationer
- Sammour T, Mittal A, Loveday BP, Kahokehr A, Phillips AR, Windsor JA, Hill AG. Systematic review of oxidative stress associated with pneumoperitoneum. Br J Surg. 2009 Aug;96(8):836-50. doi: 10.1002/bjs.6651.
- Del Rio D, Stewart AJ, Pellegrini N. A review of recent studies on malondialdehyde as toxic molecule and biological marker of oxidative stress. Nutr Metab Cardiovasc Dis. 2005 Aug;15(4):316-28. doi: 10.1016/j.numecd.2005.05.003.
- Kontoulis TM, Pissas DG, Pavlidis TE, Pissas GG, Lalountas MA, Koliakos G, Topouridou K, Sakantamis AK. The oxidative effect of prolonged CO(2) pneumoperitoneum a comparative study in rats. J Surg Res. 2012 Jun 15;175(2):259-64. doi: 10.1016/j.jss.2011.09.030. Epub 2011 Oct 12.
Datoer for undersøgelser
Studer store datoer
Studiestart
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- CGMH-IRB-102-0112A3
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