Additive Effects of Clonidine Used in Propofol Sedation in Colonoscopy

Tanta University

Status: Enrolling

Conditions: Clonidine; Propofol; Sedation; Colonoscopy

Treatments: Drug: Propofol combined with clonidine; Drug: Propofol

Study type: Interventional

Funder types: Other

Identifiers

NCT06507410

36264PR725/6/24

Details and patient eligibility

About

The objective of this study was to compare safety, satisfaction, and efficiency outcomes of propofol versus propofol with clonidine in patients undergoing colonoscopy.

Full description

Colonoscopy is one of the most common procedures in the world, Colonoscopy is a procedure often performed for prevention, diagnosis, and treatment of a variety of symptoms and diseases of the lower digestive tract, and sedation or anesthesia should be considered as an important tool to increase its effectiveness.

Sedation and analgesia are considered key components, as they reduce anxiety and discomfort and therefore improve the procedure tolerability and patient satisfaction, minimize risk of complications and provide better conditions for the examination.

Propofol may be used alone or in combination with opioids and/or benzodiazepines.

The use of propofol alone requires higher doses, which may lead to increased incidence of side effects. However, the risks and benefits of adding analgesic and sedative to propofol are controversial, and the selection of drugs is a crucial factor in determining the outcomes.

Clonidine apparently produces its sedative and anaesthetic-sparing effects by stimulation of centrally located alpha2 adrenoceptors. Analgesia seems to be mediated mainly by activation of alpha2 adrenoceptors in the dorsal horn of the spinal cord.

Enrollment: 62 estimated patients

Sex: All

Ages: 18 to 65 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Age 18-65 years.
• Both sexes.
• American Society of Anesthesiology (ASA) physical status I-II.
• Patients undergoing colonoscopy.

Exclusion criteria

• Patients had recent history of colonoscopy.
• Previous colonic resection.
• Severe heart failure (ejection fraction < 30%).
• Known history of hypersensitivity to propofol or clonidine and any need for anesthetic drug administration other than the study protocol.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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62 participants in 2 patient groups

Propofol group

Active Comparator group

Description:

Patients will receive induction of sedation as follow: Continuous propofol infusion will be given with syringe pump for maintenance, with the initial rate set at 25-75 mic/kg/min IV during the first 10-15 min. To avoid administering sedatives at rates greater than clinically necessary, infusion rates will be gradually titrated to 25-50 mic/kg/min and regulated with the clinical response, with an onset of peak drug action expected to occur within 2 min.

Treatment:

Drug: Propofol

Propofol combined with clonidine group

Experimental group

Description:

Patients will receive 2 μg/kg of clonidine for injection intravenously 30 min before induction of sedation, administered over 10 min.

Treatment:

Drug: Propofol combined with clonidine