The effect of a postoperative local anaesthetic pain pump in anterior total hip arthroplasty:A Randomised Control Trial

Not Applicable

Completed

• Conditions: Hip arthritis; Surgery - Other surgery; Musculoskeletal - Osteoarthritis

• Registration Number: ACTRN12617000974303
• Lead Sponsor: Mr Phong Tran

Brief Summary

We conducted a study to see if adding a pain pump after a total hip replacement would help patients in reducing the amount of pain medication they consume, reduce pain levels, help reduce time to discharge from the hospital, and also reduce the use of laxative and anti-nausea medication. Our study recruited 108 participants with 54 patients in each group where one group had a pain pump and the other did not. We found the use of the pain pump after a total hip replacement interestingly did not help reduce pain medication usage or lower pain scores to a significant amount compared to patients who did not have a pump. Additionally, there was also no appreciable difference in the amount of laxatives and anti-nausea medication used between the group of patients. In patients who had a pain pump, no adverse events or infection were caused by the pump. Our study has therefore shown a pain pump does not need to be used after a total hip replacement done by the anterior approach as it provides little to no benefit.

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2017-07-06
• Study Completion: 2018-05-29
• Last Update Posted: 29 March 2021

Recruitment & Eligibility

• Status: Completed
• Sex: All
• Target Recruitment: 108

Inclusion Criteria

Participants must be greater than 18 years old, have hip osteoarthritis as assessed by the principal investigator and able to give informed consent to undergo an Anterior THR.

Exclusion Criteria

Allergy or intolerance to Ropivicaine, and patients who have been diagnosed with Chronic Regional Pain Syndrome (CRPS)

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Compare opioid consumption between 2 cohort groups who have had an anterior total hip replacement, where one group has received Local infiltration anaesthetic (LIA) only and the other has received LIA + an 48-hour infusion pump. This outcome will be assessed by adding the total consumption of analgesia a participant has used as recorded on the hospital's drug chart and converting it into an oral morphine equivalent dose.[48 hours post-operatively]

Secondary Outcome Measures

Name	Time	Method
Post-operative pain scores as assessed on the verbal reported scale (VRS) which consists of a score from 0-10 where 0 = no pain, 5 = moderate pain and 10 = severe pain. [This score is initially taken in the first 30 minutes post-operatively then every 1 hour for the next 2 hours and then again every 4 hours thereafter until the participant is discharged home. <br>];Length of hospital admission will be assessed by calculating how many days the participant was an inpatient from the day the participant underwent their surgery till the day they were discharged home. [At discharge from the hospital];Anti-emetic usage between cohorts was assessed by adding how many anti-emetic tablets each participant consumed on their drug chart from post-operation until time of discharge. [At time of discharge];laxative usage between cohorts was assessed by adding how many laxative tablets each participant consumed on their drug chart from post-operation until time of discharge. [At time of discharge]