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Completed

NCT Number: NCT00308152

Intravenous Saline Pre-hydration in Patients Undergoing Outpatient Colonoscopy

Colonoscopy and sedation are frequently accompanied by hypotension, which reduces the amount of sedation able to be employed. Blood pressure is restored by the infusion of intravenous normal saline. Prophylactic infusion of normal saline may enhance the colonoscopy completion rate, and patient comfort during colonoscopy and during the recovery from colonoscopy.

The investigators propose randomising consenting adult patients attending outpatient colonoscopy to one of two treatment arms:

(i) A control arm

(ii) A treatment arm, with pre-hydration with an infusion of 1.0 litre of normal saline immediately prior to colonoscopy.

Outcome measures include colonoscopy completion rates, hypotension during or after colonoscopy, and patient ratings of comfort and satisfaction.

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Key information

Conditions

Colonic Diseases Digestive System Diseases Gastrointestinal Diseases Intestinal Diseases

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

The Canberra Hospital

Garran, Australian Capital Territory, 2605, Australia

About this study

Outpatient colonoscopy is a generally well-tolerated elective procedure. Colonoscopy completion rate is governed in part by patient comfort, which is enhanced by adequate sedation. In addition, comfort following colonoscopy determines timely recovery from the procedure and return to usual activities.

Colonoscopy and sedation are frequently accompanied by hypotension (systolic blood pressure less than 100 mm Hg), which reduces the amount of sedation able to be employed. Where apparent, blood pressure is restored by infusion of intravenous normal saline. We have observed that hypotension is relatively common and may be present at or shortly after the commencement of the procedure, suggesting that many patients undergoing colonoscopy have reduced blood volume. Therefore, prophylactic infusion of normal saline may enhance colonoscopy completion rate, and patient comfort during colonoscopy and during recovery from colonoscopy.

We propose randomising consenting adult patients attending outpatient colonoscopy to one of two treatment arms:

(i) A control arm, with standard sedation and monitoring during colonoscopy, and infusion of normal saline if systolic BP ≤ 95 mmHg for more than 3 minutes (two observation periods) until completion of the procedure;

(ii) A treatment arm, with pre-hydration with an infusion of 1.0 litre of normal saline immediately prior to colonoscopy.

Outcome measures include colonoscopy completion rates, hypotension during or after colonoscopy, and patient ratings of comfort and satisfaction.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Aged 18 or older
  • Able to provide informed consent
  • Booked for outpatient colonoscopy, where appointment has been generated by Gastroenterology Unit bookings staff.

Exclusion criteria

  • Booked for anaesthetist-supervised colonoscopy because of previous sedation difficulties or significant co-morbidity (American Society of Anesthesiology Class III or IV)
  • Subjects requiring dialysis
  • Subjects receiving parenteral nutrition
  • Subjects with current congestive cardiac failure
  • Subjects with conditions preventing placement and accurate use of the automatic blood pressure cuff on the left arm, such as morbid obesity or lymphoedema

Treatment and study plan

Infusion of 1 litre of normal saline before colonoscopy

Drug

Prehydration with normal saline

Primary outcomes

  1. The number of subjects with documented hypotension (systolic blood pressure [BP] ≤ 95 mmHg for 1 or more automatic BP measures taken at 3 minute intervals), during colonoscopy or the recovery period

  2. Colonoscopy completion rates. Raw completion rates, with no allowance for failed bowel preparation or technical difficulties, will be used.

  3. The number of subjects reaching criteria for discharge at 30 minutes after arrival in the recovery area

  4. Comfort and satisfaction scores: discomfort during colonoscopy, discomfort after colonoscopy, satisfaction with sedation, overall satisfaction

  5. Time taken to resume normal activities

  6. Where relevant, adverse events such as post-procedure nausea, syncope, and prolonged recovery time, will be recorded in both arms of the study for comparison.

Sponsors and collaborators

Lead sponsor

The Canberra Hospital

Other

Registry information

Official study title

Randomised, Controlled Trial of Intravenous Saline Pre-hydration in Patients Undergoing Outpatient Colonoscopy

Important dates

Study start
2006
Primary completion
2008
Study completion
2008
First posted
Mar 29, 2006
Registry last updated
Jul 27, 2016

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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