Acute Postoperative Pain in Outpatient UKA (Outpatient UKA)

July 3, 2026 updated by: Boonchana Pongcharoen, Thammasat University

Acute Postoperative Pain in Outpatient Versus Inpatient Unicompartmental Knee Arthroplasty: A Prospective Cohort Study

This study determined or observe the acute postoperative between outpatient UKA and inpatient UKA. We observe the acute post op. at at 0,1, and 2. The acute post op pain compeared between two groups.

Study Overview

Status

Completed

Conditions

Acute Post Operative Pain

Detailed Description

The Oxford knee score, operative time, blood loss and moephine consumption also recored.

Study Type

Observational

Enrollment (Actual)

244

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

Thailand
- Changwat Pathum Thani
  - Pathum Thani, Changwat Pathum Thani, Thailand, 12120
    - Boonchana Pongcharoen
  - Pathum Thani, Changwat Pathum Thani, Thailand, 12120
    - Faculty of medicine, Thammsat university

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

Adult
Older Adult

Accepts Healthy Volunteers

Sampling Method

Non-Probability Sample

Study Population

anteromedia osteoarthritis of the knee

Description

Inclusion Criteria:

age ≥ 50 years, range of movement ≥ 90°, varus deformity ≤ 10°, and flexion contracture ≤ 10°.

Exclusion Criteria:

age ≥ 75 years, ASA physical status score > 2, diagnosed obstructive sleep apnea, and intraoperative conversion to total knee arthroplasty due to full-thickness cartilage loss in the lateral compartment.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Number of groups / cohorts

Cohorts and Interventions

Group / Cohort
Inpatient UKA Aii patients received the stabndard surgical technique.
outpatient UKA all patients received the standard surgical technqiue

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
acute postoperative pain Time Frame: at day 0 (day of surgery), day 1 and day 2	Vas for pain, 0 to 10	at day 0 (day of surgery), day 1 and day 2

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Oxford knee score Time Frame: OKS at 6 weeks, 3 months, 1 year, 2 years	0 to 48 points	OKS at 6 weeks, 3 months, 1 year, 2 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Thammasat University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 1, 2022

Primary Completion (Actual)

October 24, 2024

Study Completion (Actual)

January 1, 2025

Study Registration Dates

First Submitted

June 23, 2026

First Submitted That Met QC Criteria

July 3, 2026

First Posted (Actual)

July 7, 2026

Study Record Updates

Last Update Posted (Actual)