Effect of Intrathecal Clonidine in Hypertensive Subjects With Poorly Controlled Blood Pressure
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Hemodynamic Effect of Intrathecal Clonidine in Hypertensive Subjects: A Pilot Study to Assess Its Effectiveness in Hypertensive Subjects With Poor Blood Pressure Control (Phase II)|
- Change in Blood Pressure After Intrathecal Injection of Clonidine. [ Time Frame: Baseline, Every 10 Minutes for first hour after clonidine injection, and every 15 minutes after first hour, until 4 hours after clonidine injection ]
Subjects baseline blood pressure (systolic blood pressure (SBP), and diastolic blood pressure (DBP)), and blood pressures after clonidine injection was compared against baseline to assess efficacy of clonidine in refractory hypertensive subjects. Subject's blood pressure was monitored continuously after intrathecal injection of clonidine until subjects blood pressure nadir and return to pre clonidine injection level. The mean value reported below are the average changes in blood pressure from baseline (pre clonidine injection) in both SBP and DBP during post clonidine injection blood pressure monitoring for 4 hours.
Blood pressure measurements were collected every 10 minutes for first hour after injection, and every 15 minutes after the first hour, up to 4 hours were averaged to report the change from baseline.
- Likert Scale Pain Rating [ Time Frame: Pre-dose and 1 hour post injection. ]Likert scale is 11 point digital pain rating system that asks subjects to rate their pain from 0 to 10. Rating of 0 means no pain at all, and in increasing order, 10 would mean worst pain imaginable/ unbearable pain.
- Changes in Visual Analogue Scale (VAS) Ratings of Sedation and Sensation of Dry Mouth Reported by the Subjects, Pre and 1 Hour Post Injection [ Time Frame: Before clonidine injection (Baseline), and at 1 hour after clonidine injection. ]Subjects were asked to rate severity of two of the most common side effects of clonidine, sedation and sensation of dry mouth, at pre and post (1 hour after) intrathecal administration of clonidine. The mean changes between pre and post injection VAS ratings of sedation and sensation of dry mouth are reported below. The VAS scale ranges from 1 to 10 cm, with higher values indicating higher level of sedation and higher level of dry mouth.
|Study Start Date:||February 2011|
|Study Completion Date:||July 2012|
|Primary Completion Date:||July 2012 (Final data collection date for primary outcome measure)|
Experimental: Intrathecal Clonidine
Subject will receive one time Clonidine injection via lower lumber interspace. Clonidine (Duraclon), 100 μg/ml, 1.5 ml will be diluted to 2 ml with preservative free saline, and total of 150 μg will be delivered. Supine and sitting blood pressures and heart rate will be measured at 10 minute intervals until 60 minutes after clonidine administration, then at 15 minutes for next 3 hours.
Other Name: catapres
Hypertension occurs commonly, is associated with major morbidity and mortality, and responds poorly to current therapies in a small minority of compliant patients. The goal of this investigator-initiated study is to determine whether intrathecal administration of clonidine reduces blood pressure in hypertensive patients, focusing on a group who often achieve inadequate blood pressure control with multiple drug therapy.
After consent, pts will be screened and if qualified brought into center and intrathecal injection of clonidine given. Patients will be closely monitored for 4 hours, while data is collected.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01297335
|Principal Investigator:||Richard L. Rauck, MD||Owner|