Clinical Trials Logo

Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT03420586
Other study ID # 01-5623-7/17
Secondary ID
Status Completed
Phase N/A
First received
Last updated
Start date February 7, 2018
Est. completion date July 25, 2021

Study information

Verified date August 2020
Source General Hospital Zadar
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Addition of nitrous oxide N2O towards the end of prolonged isoflurane anesthesia hastens patients recovery. The hypothesis is that the addition of N2O at the end of prolonged sevoflurane anaesthesia also hastens early recovery without increasing the frequencies and intensity of PONV and improves quality of recovery.


Description:

The investigators will include 100 adult patients, American Society of Anesthesiologists (ASA) physical status I-III, who will be scheduled for elective laparotomies or laparoscopic surgeries under sevoflurane anesthesia lasting 120 minutes or longer. After written informed consent participants will be randomized into two groups: GO2 - air in 30% oxygen and GN2O - the same mixture until the last 30 minutes of surgery when 70% N2O in 30% oxygen will be used. General anesthesia will be performed with propofol and fentanyl for anesthesia induction, rocuronium for muscle relaxation and volatile anesthetic sevoflurane for maintenance. The participants will be extubated in the operation room (OR) after they open their eyes and follow commands. Postanesthetic recovery score by Aldrete, Ramsay sedation scale (RSS), and Simplified postoperative nausea and vomiting impact scale score by Myles (PONV ISS) will be used to assess recovery in PACU and surgical ward. Modified Aldrete score assigns a score of 0, 1, or 2 to activity, respiration, circulation, consciousness, and color, giving a maximal score of 10 ( score of 9 indicates recovery sufficient for the patient to be transferred from the PACU). RSS [score 1-6] consists of six levels of sedation [Awake levels: 1, anxious and agitated or restless or both; 2, co-operative, orientated, and tranquil; 3,responds to commands only. Asleep levels are dependent on the response to a light glabellar tap or loud auditory stimulus: 4, a brisk response; 5, a sluggish response; 6, no response]. PONV ISS is the sum of the numerical responses to questions Q1 and Q2 ( Q1: The vomiting or dry-retching count? 0 - 2 or 3 (three or more times); Q2: Severity of nausea - interference with activities of daily living: score 0-3 [0 - not at all, 1-sometimes, 2- often or most of the time, 3 - all of the time] and score ≥5 defines clinically important PONV. Quality of Recovery questionnaire (QoR-40) on the first, second and third postoperative days will be used for assessment of postoperative quality of recovery.The QoR-40 consists of five clinically relevant dimensions: (i) physical comfort (12 items), (ii) emotional state (9 items), (iii) physical independence (5 items), (iv) psychological support (7 items), and (v) pain (7 items). Each item is rated on a five-point Likert scale. The QoR-40 score ranges from 40 (extremely poor quality of recovery) to 200 (excellent quality of recovery). A 100 mm visual analogue scale (VAS) [0= no pain, 10= maximal pain] and the use of postoperative analgesics (opioids/non-opioids: yes or no, quantity in milligrams) shall be used for pain assessment during the first 24 postoperative hours.The sample size for early recovery time (primary endpoint) is based on the results of our recent study. The sample size was calculated on the assumption that 15 (SD 7) min would be needed for early recovery for the GO2 patients and that the GN2O patients would require four minutes less time (11 [SD 5] min). We would need 38 participants in each group for the primary outcome to have a power of 0.8 and an alpha level of 0.05.


Recruitment information / eligibility

Status Completed
Enrollment 100
Est. completion date July 25, 2021
Est. primary completion date July 10, 2021
Accepts healthy volunteers No
Gender All
Age group 18 Years to 80 Years
Eligibility Inclusion Criteria: - Adult patients, American Society of Anesthesiologists Physical status ASA PS I-III, scheduled for laparotomic and laparoscopic surgery expected to last 2 hours or more who can understand and signed informed consent. Exclusion Criteria: - Patients who will be discharged within 72 hours after surgery - Patients on intensive care within few months before the study enrollment - Diseases that impair gastric motility (diabetes mellitus, chronic cholecystitis, gastric and intestinal disease, neuromuscular disorders, neuropathies, liver dysfunction) - Vestibular disease; history of migraine headaches, central nervous system injury - Renal impairment - Patients on antihistamines, antipsychotics, contraceptives, steroids within 72 hours before surgery - Known hypersensitivity to drugs used in the study protocol - Alcoholism, and/or opioid addiction - Conditions that can influence the incidence of PONV, postoperative pain or morbidity (e.g., significant intraoperative surgery complications), intraoperative drug allergy, severe intraoperative hypotension, perioperative hypoxia, excessive blood loss, difficult intubation

Study Design


Related Conditions & MeSH terms


Intervention

Drug:
Nitrous Oxide
The nitrous oxide group (GN2O) will receive 70% N2O in 30% O2 at the end of surgery.

Locations

Country Name City State
Croatia General Hospital Zadar Zadar

Sponsors (1)

Lead Sponsor Collaborator
General Hospital Zadar

Country where clinical trial is conducted

Croatia, 

References & Publications (7)

Agoliati A, Dexter F, Lok J, Masursky D, Sarwar MF, Stuart SB, Bayman EO, Epstein RH. Meta-analysis of average and variability of time to extubation comparing isoflurane with desflurane or isoflurane with sevoflurane. Anesth Analg. 2010 May 1;110(5):1433-9. doi: 10.1213/ANE.0b013e3181d58052. — View Citation

Jones PM, Bainbridge D, Chu MWA, Fernandes PS, Fox SA, Iglesias I, Kiaii B, Lavi R, Murkin JM. Comparison of isoflurane and sevoflurane in cardiac surgery: a randomized non-inferiority comparative effectiveness trial. Can J Anaesth. 2016 Oct;63(10):1128-1139. doi: 10.1007/s12630-016-0706-y. Epub 2016 Jul 27. — View Citation

Mraovic B, Simurina T, Gan TJ. Nitrous oxide added at the end of isoflurane anesthesia hastens early recovery without increasing the risk for postoperative nausea and vomiting: a randomized clinical trial. Can J Anaesth. 2018 Feb;65(2):162-169. doi: 10.1007/s12630-017-1013-y. Epub 2017 Nov 17. — View Citation

Myles PS, Hunt JO, Nightingale CE, Fletcher H, Beh T, Tanil D, Nagy A, Rubinstein A, Ponsford JL. Development and psychometric testing of a quality of recovery score after general anesthesia and surgery in adults. Anesth Analg. 1999 Jan;88(1):83-90. — View Citation

Myles PS, Weitkamp B, Jones K, Melick J, Hensen S. Validity and reliability of a postoperative quality of recovery score: the QoR-40. Br J Anaesth. 2000 Jan;84(1):11-5. — View Citation

Myles PS, Wengritzky R. Simplified postoperative nausea and vomiting impact scale for audit and post-discharge review. Br J Anaesth. 2012 Mar;108(3):423-9. doi: 10.1093/bja/aer505. Epub 2012 Jan 29. — View Citation

Peyton PJ, Wu CY. Nitrous oxide-related postoperative nausea and vomiting depends on duration of exposure. Anesthesiology. 2014 May;120(5):1137-45. doi: 10.1097/ALN.0000000000000122. Erratum in: Anesthesiology. 2014 Dec;121(6):1359. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Other Postoperative sedation Ramsay Sedation Scale [score 1-6] consists of six levels of sedation [Awake levels: 1, patient anxious and agitated or restless or both; 2, patient co-operative, orientated, and tranquil; 3, patient responds to commands only. Asleep levels are dependent on the patient's response to a light glabellar tap or loud auditory stimulus: 4, a brisk response; 5, a sluggish response; and 6, no response]. 2 hours
Other Postoperative nausea and vomiting The use of rescue antiemetics (yes/no and quantity in milligrams) 24 hours
Other Postoperative pain The use of analgesics (opioids/nonopioids:yes/no and quantity in milligrams) 24 hours
Other Readiness for Discharge from the Postanesthesia Care Unit (PACU) Modified Aldrete score: Activity - able to move voluntarily or on command: 2 - four extremities ; 1- two extremities ; 0- extremities 0; Respiration: 2 - able to deep breathe and cough freely , 1 - dyspnea, shallow or limited breathing , 0 - apneic. Circulation - blood pressure , BP of preanesthetic level: 2 - BP ± 20 mm; 1 - BP ± 20-50 mm; 0 - BP ± 50 mm. Consciousness: 2 fully awake;1 arousable on calling; 0 not responding.O2 saturation : 2 - able to maintain O2 saturation >92% on room air; 1- needs O2 inhalation to maintain O2 saturation >90%; 0 - O2 saturation <90% even with O2 supplementation. A score 9 and more = Ready for Discharge from the Postanesthesia Care Unit 2 hours
Primary Early recovery (awakening) in the operation room (OR) eye opening (in minutes), following verbal commands (in minutes), time to extubation (in minutes ), orientation to time and place (in minutes) 15 minutes
Secondary Postoperative nausea and vomiting Simplified postoperative nausea and vomiting impact scale:the sum of the numerical responses to questions Q1 and Q2 ( Q1: The vomiting or dry-retching count? 0 -2 or 3 (three or more times); Q2: Severity of nausea - interference with activities of daily living: score 0-3 [0 - not at all, 1-sometimes, 2- often or most of the time, 3- all of the time] ) and score =5 defines clinically important PONV. 24 hours
Secondary Quality of recovery Quality of Recovery 40 questionnaire on the first, second and third postoperative days: The QoR-40 consists of five clinically relevant dimensions: (i) physical comfort (12 items), (ii) emotional state (9 items), (iii) physical independence (5 items), (iv) psychological support (7 items), and (v) pain (7 items). Each item is rated on a five-point Likert scale. The QoR-40 score ranges from 40 (extremely poor quality of recovery) to 200 (excellent quality of recovery). 72 hours
Secondary Postoperative pain Visual analogue scale VAS pain score [a 100 mm visual analogue scale (VAS) 0= no pain, 10= maximal pain] 24 hours
See also
  Status Clinical Trial Phase
Recruiting NCT06063798 - Respiratory Effects of Flow-Controlled Ventilation and Jet Ventilation in Patients Undergoing Laryngotracheal Surgery N/A
Not yet recruiting NCT05035069 - Efficacy and Safety of Ciprofol Compared to Propofol for Nonintubated General Anesthesia in Patients Undergoing TAVR Phase 4
Completed NCT03861364 - Hemodynamics During Induction of General Anesthesia With High and Low Propofol Dose. Phase 4
Completed NCT02711280 - The Effect of Anesthetics on Oxidative Stress and Apoptosis Status in Children N/A
Completed NCT01199471 - Estimate the Behavior of Chinese Anesthesiologists Practicing General Anesthesia With Sevoflurane N/A
Completed NCT00917033 - Tracheal Intubation of Morbidly Obese Patients. GlideScope Versus Direct Laryngoscopy Phase 4
Completed NCT00391885 - Target-controlled Infusion of Propofol and Remifentanil During General Anaesthesia Guided by Entropy Phase 4
Completed NCT00552617 - A Bridging Trial Comparing Sugammadex (Org 25969) at Reappearance of T2 in Japanese and Caucasian Participants. Part B: Caucasian Participants (P05971) Phase 2
Completed NCT03705026 - Relationship Between Genetic Polymorphism and Postoperative Nausea and Vomiting in Chinese Han Population
Completed NCT00552929 - A Bridging Trial Comparing Sugammadex (Org 25969) at 1-2 Post-Tetanic Count (PTC) in Caucasian Participants. Part B (P05974) Phase 2
Completed NCT00475215 - Safety and Efficacy of Sugammadex (Org 25969, MK-8616) in Participants With or Having a Past History of Pulmonary Disease (19.4.308) (P05932) (MK-8616-017) Phase 3
Completed NCT00298831 - Use of Sugammadex at the End of Case in Routine Anesthesia (MK-8616-023) Phase 3
Recruiting NCT03943745 - EEG Changes During Induction of Propofol Anesthesia
Completed NCT03697642 - Nasopharyngeal Airway Guide Nasogastric Tube Placement N/A
Completed NCT04595591 - Observation of Propofol Titration at Different Speeds N/A
Not yet recruiting NCT05841316 - The ED95 Dose of Sugammadex to Reverse Rocuronium-Induced Deep Neuromuscular Block Back to Shallow Neuromuscular Block
Completed NCT04532502 - Impact of Anesthetic Environment the Sex Ratio of the Children of Female Assistants
Completed NCT03330236 - EEG - Guided Anesthetic Care and Postoperative Delirium N/A
Recruiting NCT06205212 - High-flow Nasal Oxygenation During Preoxygenation and Atelectasis N/A
Completed NCT00379613 - Use of Sugammadex Administered at 5 Minutes After Administration of 1.2 mg/kg Esmeron® (19.4.205)(P05942) Phase 2