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Trial details imported from ClinicalTrials.gov
For full trial details, please see the original record at
https://clinicaltrials.gov/study/NCT01027455
Registration number
NCT01027455
Ethics application status
Date submitted
7/12/2009
Date registered
8/12/2009
Date last updated
25/06/2010
Titles & IDs
Public title
Warm Humid Gas Insufflation for Appendix Removal by Minimally Invasive Surgery Warm Humid Insufflation for Appendix Removal by Minimally Invasive Surgery Trial (WARMIST)
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Scientific title
Warm Humidified Insufflation for Laparoscopic Appendicectomy in Children: a Randomised Controlled Trial
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Secondary ID [1]
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WARMIST
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Universal Trial Number (UTN)
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Trial acronym
WARMIST
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Peritoneal Dessication Damage and Inflammation
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Peri-operative Hypothermia
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Condition category
Condition code
Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Treatment: Devices - Fisher and Paykel Insuflow (MR 860) Surgical Humidification Device
Treatment: Surgery - Laparoscopic Appendicectomy
Treatment: Surgery - Laparoscopic Appendicectomy
Placebo comparator: Dry Cold - Dry (0% relative humidity) and cold (20 degrees Celsius - Room Temperature) carbon dioxide gas intraperitoneal insufflation for laparoscopic appendicectomy
Experimental: Humidification - Humidified (98% relative humidity) and warm (37 degrees Celsius) carbon dioxide gas intraperitoneal insufflation for laparoscopic appendicectomy
Treatment: Devices: Fisher and Paykel Insuflow (MR 860) Surgical Humidification Device
Humidified warm carbon dioxide gas insufflation during laparosopic procedure
Treatment: Surgery: Laparoscopic Appendicectomy
Dry and Cold carbon dioxide gas insufflation
Treatment: Surgery: Laparoscopic Appendicectomy
Humidified warm carbon dioxide gas insufflation during laparosopic procedure
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Intervention code [1]
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Treatment: Devices
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Intervention code [2]
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Treatment: Surgery
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Comparator / control treatment
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Control group
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Outcomes
Primary outcome [1]
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Post-operative Morphine equivalent analgesia use
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Assessment method [1]
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Timepoint [1]
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PACU, Post-operative 12 hours, Post-operative 24 hours, Post-operative 48 hours, Duration of hospital stay
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Primary outcome [2]
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Peri-operative Core Body Temperature Variation
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Assessment method [2]
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Timepoint [2]
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Intra-operative, Duration of stay in PACU
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Secondary outcome [1]
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Pain scores measured by Visual Analogue Scale
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Assessment method [1]
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Timepoint [1]
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Pre-operative baseline and Post-operative 2, 4, 6, 8, 10, 12, 24, 48 hours
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Secondary outcome [2]
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Post-operative Return to Normal Daily Activities
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Assessment method [2]
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Timepoint [2]
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Post-operative Day 10 Recovery Questionnaire
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Secondary outcome [3]
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Severity of Post-operative Nausea and Vomiting as indicated by Antiemetic use
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Assessment method [3]
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Timepoint [3]
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Post-operative Day 0, Day 1, Day 2, Day 3
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Secondary outcome [4]
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Peri-operative Complications (operative and disease-related)
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Assessment method [4]
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Timepoint [4]
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Up to 6 weeks post-operatively
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Secondary outcome [5]
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Severity of Laparoscopic Camera Lens Fogging
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Assessment method [5]
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Timepoint [5]
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Intra-operative
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Eligibility
Key inclusion criteria
* Healthy volunteers aged 8-14 years presenting to Starship Children's Hospital (Auckland, New Zealand) within the study period diagnosed clinically with acute appendicitis requiring diagnostic laparoscopy +/- appendicectomy.
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Minimum age
8
Years
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Maximum age
14
Years
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Sex
Both males and females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
* Consent to participate in study not obtained, partial or total blindness, unable to speak and read sufficient English, presence of any abdominal prostheses, diagnosis of mental retardation, developmental delay, neuromuscular impairment, attention-deficit disorder, chronic pain, or psychiatric illness, immunosuppression, allergy to morphine, and history of previous abdominal surgery
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Study design
Purpose of the study
Treatment
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
Blinded (masking used)
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Who is / are masked / blinded?
The people receiving the treatment/s
The people administering the treatment/s
The people assessing the outcomes
The people analysing the results/data
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Intervention assignment
Parallel
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Other design features
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Phase
NA
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
UNKNOWN
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Data analysis
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Reason for early stopping/withdrawal
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Other reasons
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Date of first participant enrolment
Anticipated
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Actual
1/03/2010
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
1/03/2011
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Actual
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Sample size
Target
190
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
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Recruitment outside Australia
Country [1]
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New Zealand
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State/province [1]
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Auckland
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Funding & Sponsors
Primary sponsor type
Other
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Name
University of Auckland, New Zealand
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Address
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Country
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Other collaborator category [1]
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Government body
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Name [1]
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Auckland District Health Board
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Address [1]
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Country [1]
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Ethics approval
Ethics application status
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Summary
Brief summary
In laparoscopic (key-hole) surgery, the use of cold dry carbon dioxide gas to inflate the abdominal cavity for the creation a clear operating field, results in damage to the cavity lining, known as the peritoneum. This has been associated with negative effects on post-operative recovery. Adult studies using warm humidified insufflation gas have indicated possible decreased post-operative pain, reduced narcotic analgesia requirements, decreased fogging of the laparoscopic camera lens, and reduced time to return to normal activities. Cold dry gas during laparoscopic surgery also has potential to cause abnormal decrease in body core temperature (hypothermia). This has been established by trials in adult humans and animal models. The WARMIST study aims to investigate for whether warm humid gas insuflation during laparoscopic removal of the appendix in children reduces intraoperative temperature variations, post-operative pain (indicated by morphine usage and pain scores), length of hospital stay and degree of camera lens fogging, and speed post-operative recovery compared to using cold dry gas insufflation.
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Trial website
https://clinicaltrials.gov/study/NCT01027455
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Trial related presentations / publications
Yu TC, Hamill JK, Liley A, Hill AG. Warm, humidified carbon dioxide gas insufflation for laparoscopic appendicectomy in children: a double-blinded randomized controlled trial. Ann Surg. 2013 Jan;257(1):44-53. doi: 10.1097/SLA.0b013e31825f0721.
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Public notes
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Contacts
Principal investigator
Name
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Address
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Country
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Phone
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Fax
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Email
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Contact person for public queries
Name
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James KM Hamilll, MBChB, FRACS
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Address
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Country
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Phone
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+64 9 3797440
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Fax
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Email
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[email protected]
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Contact person for scientific queries
No information has been provided regarding IPD availability
What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
No documents have been uploaded by study researchers.
Results not provided in
https://clinicaltrials.gov/study/NCT01027455
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