Healthy
Conditions
Keywords
Healthy volunteer
Brief summary
Post operative ileus (POI), a temporary paralysis of the intestines, is a serious health care problem. It normally occurs in all patients after surgery to the abdomen but in some cases can result in serious complications. The objective of this study is to determine if inhaling very low doses of carbon monoxide (CO) before and after colon surgery will shorten the duration of normal POI and/or prevent the development of POI complications in patients undergoing colon surgery. This preliminary study will be conducted in ten healthy volunteers to monitor for blood levels and adverse effects that occur at different durations of exposure of inhaled CO to establish a safe dose for patients in the main trial. For the main trial, patients requiring surgery to their colon will be assigned randomly to receive one hour treatments of either CO or oxygen by face mask before and after their operation. We hypothesize that healthy volunteers will be able to tolerate 1 hour doses of 250 ppm of CO with minimal side effects. It is also anticipated that for each dose of CO administered, the blood levels of CO will remain well under poisonous levels. Finally, we anticipate blood levels of CO will return to baseline level within 24 hours following the last dose of CO.
Interventions
DRUG250 ppm carbon monoxide
250 ppm of inhaled carbon monoxide over one hour
Sponsors
The Physicians' Services Incorporated Foundation
Queen's University
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
Yes
Inclusion criteria
* Men and women, age \> 18 years. * Women must be using acceptable contraceptives, post-menopausal or surgically sterile. * No prior smoking history. * BMI between 16 and 30 inclusive. * In good health as per medical history, physical exam, vital signs & ECG.
Exclusion criteria
* Exposure to carbon monoxide during the 48 hours prior to the study day. * Occupational exposure to CO. * Significant disease that may put the volunteer at risk because of participation in the study or may influence the results of the study or the volunteer's ability to participate in the study. * Baseline blood level of COHb \>2%. * Patients with underlying lung disease such as asthma or COPD. * Baseline oxygen saturation \<92% on room air. * Planned pregnancy, already pregnant or breastfeeding. * Participation in another clinical trial within 2 months prior to study.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Adverse Event Rate | Before and after carbon monoxide exposure |
Countries
Canada
Outcome results
None listed