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Study of Prevention of Postoperative Nausea and Vomiting Using Cesamet

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St. Michael's Hospital, Toronto

キーワード

概要

Untreated, one third of patients undergoing general anesthesia will have postoperative nausea, vomiting, or both.
Patients often rate postoperative nausea and vomiting (PONV) as worse than postoperative pain. PONV increases the risk of aspiration and has been associated with suture dehiscence, esophageal rupture, subcutaneous emphysema, and bilateral pneumothoraxes. PONV frequently delays discharge, and is the leading cause of unexpected hospital admission after planned ambulatory surgery.
Nabilone (Cesamet®) is a synthetic cannabinoid developed in the 1970s which is a potent CB1 agonist. The use of nabilone in preventing nausea and vomiting in patients receiving chemotherapy has been thoroughly investigated. Results from clinical studies demonstrated the efficacy, safety, and tolerability of Cesamet in this population. There has been success in the past translating treatments for chemotherapy-induced nausea and vomiting (ie. 5-HT receptor agonists including Ondansetron and Granisetron) to use in the perioperative environment.
Only one RCT has studied the use of nabilone for the reduction of PONV. Published in 1995, this study compared the administration of either Cesamet 2 mg or metoclopramide 10 mg given 90 minutes before the operation in patients scheduled for elective hysterectomy in 60 women. This study failed to show any significant difference between groups. There are several limitations to this study including a poorly optimized dosing regimen, a small sample size, and a comparison group lacking clinical generalizability.
This study will investigate the use Cesamet vs Placebo, in addition to the regular antiemetic treatment which patients receive at the discretion of the managing anesthesiologist, for the prevention of PONV. The study group will include patients undergoing general anesthesia for elective ambulatory surgery with at least 3 risk factors (>60% risk) for the development of PONV.

説明

See above

日付

最終確認済み: 10/31/2015
最初に提出された: 03/02/2014
提出された推定登録数: 04/13/2014
最初の投稿: 04/15/2014
最終更新が送信されました: 11/30/2015
最終更新日: 12/02/2015
実際の研究開始日: 03/31/2014
一次完了予定日: 12/31/2014
研究完了予定日: 10/31/2015

状態または病気

Postoperative Nausea and Vomiting

介入/治療

Drug: Cesamet (nabilone)

Drug: Placebo

段階

段階 2

アームグループ

介入/治療
Active Comparator: Cesamet (nabilone)
0.5 mg capsule containing Cesamet (single dose) given preoperatively
Drug: Cesamet (nabilone)
Nabilone (0.5 mg) or placebo given preoperatively
Placebo Comparator: Placebo
identical capsule containing placebo (single dose) given preoperatively
Drug: Placebo
Placebo Comparator: identical capsule containing placebo (single dose) given preoperatively

適格基準

研究の対象となる年齢 18 Years に 18 Years
研究に適格な性別All
健康なボランティアを受け入れるはい
基準

Inclusion Criteria:

- Age 18 or older with an American Society of Anesthesiologists (ASA) physical status of I to III who are scheduled to undergo elective surgery under general anesthesia with pre-anesthesia consultation prior to surgery.

- Subjects must be able to swallow study medication;

- At a risk of postoperative nausea and vomiting of at least 61% percent, according to a simplified risk score, based on the presence of at least three of the following risk factors: female sex, nonsmoker status, anticipated use of postoperative opioid and previous PONV or motion sickness.

Exclusion Criteria:

- Subjects with clinically significant or unstable cardiac, respiratory, hepatic, renal, or other major organ system disease

- Patients who will not be admitted to the PACU post-operatively (patients who are immediately transferred to the ICU)

- Known sensitivity to marijuana or other cannabinoid agents

- Psychotic illness or depression

- Addiction to illicit substances or alcohol

- Non-psychotic emotional disorders.

- Pregnant or lactating

- Subjects who suffer from chronic nausea and/or vomiting;

- Has had treatment with any other investigational drug within 12 weeks prior to randomization

- Subjects who, in the opinion of the investigator, would experience an unacceptable risk from administration of study drug

結果

主な結果の測定

1. Incidence of postoperative nausea and/or vomiting [Prior to discharge from postanesthesia care unit, an expected average of two hours]

二次的な結果の測定

1. Number of antiemetic rescue medications given postoperatively. [Prior to discharge from postanesthesia care unit, an expected average of two hours]

その他の成果対策

1. Standardized score of nausea and/or vomiting severity if PONV occurs. [Prior to discharge from postanesthesia care unit, an expected average of two hours]

2. Pain score during the immediate post-operative period. [Prior to discharge from postanesthesia care unit, an expected average of two hours]

3. Use of intraoperative and postoperative opioids [Prior to discharge from postanesthesia care unit, an expected average of two hours]

4. Rates of known side effects. [Prior to discharge from postanesthesia care unit, an expected average of two hours]

Nabilone side effects include: drowsiness, vertigo, psychological high, dry mouth, depression, blurred vision, sensation disturbance, anorexia, headache, euphoria, and hallucinations (based on patient self-reporting).

5. Time to discharge from the PACU. [Prior to discharge from postanesthesia care unit, an expected average of two hours]

6. Rates of admission due to PONV [Prior to discharge from postanesthesia care unit, an expected average of two hours]

7. Antiemetics given prophylactically by the anesthesiologist. [Until discharge from postanesthesia care unit, an expected average of two hours]

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