NCT03808155

Brief Summary

Various studies have shown that the risk of suffering a urinary retention after knee or hip prosthesis surgery is 10-80%. The aim of the study is to reduce this riks. For this purpose, it is investigated whether a previously known drug (tamsulosin) which is used in bladder emptying disorders, can achieve a reduction in urinary retention after surgery. After the patients agree to participate in the study, they are examined in our urological clinic. Uroflowmetry is performed with sonographic residual volume measurement and prostate volume measurement. Furthermore, a standardized Voiding questionaire (IPSS) is completed. This study is conducted as a double-blind study using a placebo control group. The drug / placebo is taken once a day, five days before and two days after surgery. Subsequently, it is observed whether it comes to a urinary retention or not. After the operation, no further urological checks are planned or needed.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
170

participants targeted

Target at P50-P75 for phase_4

Timeline
Completed

Started Aug 2019

Longer than P75 for phase_4

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

January 15, 2019

Completed
2 days until next milestone

First Posted

Study publicly available on registry

January 17, 2019

Completed
7 months until next milestone

Study Start

First participant enrolled

August 1, 2019

Completed
5.2 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

October 22, 2024

Completed
4 months until next milestone

Study Completion

Last participant's last visit for all outcomes

March 4, 2025

Completed
Last Updated

September 3, 2025

Status Verified

October 1, 2024

Enrollment Period

5.2 years

First QC Date

January 15, 2019

Last Update Submit

August 26, 2025

Conditions

Keywords

Urinary retentionTamsulosin

Outcome Measures

Primary Outcomes (1)

  • Occurrence of urinary retention

    The primary outcome is the occurrence of urinary retention during the 48 postoperative hours.

    48 hours postoperatively

Secondary Outcomes (4)

  • Type of anaesthesia

    48 hours postoperatively

  • Preoperative residual volume

    Minimum 6 days before the planned operation.

  • Prostate size

    Minimum 6 days before the planned operation.

  • International prostate symptom score (IPSS).

    Minimum 6 days before the planned operation.

Study Arms (2)

Tamsulosin

ACTIVE COMPARATOR

The study specific product Tamsulosin 0.4mg, a tablet which is taken once a day per os five days prior to the operation and two days after the operation.

Drug: Tamsulosin

Placebo Oral Tablet

PLACEBO COMPARATOR

The placebo is taken once a day per os five days prior to the operation and two days after the operation.

Drug: Placebo Oral Tablet

Interventions

The drug ist taken once a day per os five days prior to the operation and two days after the operation.

Also known as: Pradif
Tamsulosin

The placebo ist taken once a day per os five days prior to the operation and two days after the operation.

Placebo Oral Tablet

Eligibility Criteria

Age18 Years+
Sexmale(Gender-based eligibility)
Gender Eligibility DetailsThe participant has to be a genectic male with all male organs.
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • \- male adults undergoing elective hip- or knee arthroplasty

You may not qualify if:

  • women
  • underage patients
  • pre-existing treatment with tamsulosin or other prostate affecting medication
  • patients who underwent transurethral resection of the prostate or prostatectomy
  • patients with urethral strictures
  • patients with neurological bladder dysfunction
  • Known allergy to tamsulosin
  • Hypotensive disorder

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Kantonsspital Graubünden

Chur, Kanton Graubünden, 7000, Switzerland

Location

MeSH Terms

Conditions

Urinary Retention

Interventions

Tamsulosin

Condition Hierarchy (Ancestors)

Urination DisordersUrologic DiseasesFemale Urogenital DiseasesFemale Urogenital Diseases and Pregnancy ComplicationsUrogenital DiseasesMale Urogenital Diseases

Intervention Hierarchy (Ancestors)

BenzenesulfonamidesSulfonamidesAmidesOrganic ChemicalsBenzene DerivativesHydrocarbons, AromaticHydrocarbons, CyclicHydrocarbonsSulfonesSulfur Compounds

Study Officials

  • Räto T. Strebel, PD Dr. med.

    Kantonsspital Graubünden

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
phase 4
Allocation
RANDOMIZED
Masking
QUADRUPLE
Who Masked
PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
Masking Details
Double blind.
Purpose
PREVENTION
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Head of Urology

Study Record Dates

First Submitted

January 15, 2019

First Posted

January 17, 2019

Study Start

August 1, 2019

Primary Completion

October 22, 2024

Study Completion

March 4, 2025

Last Updated

September 3, 2025

Record last verified: 2024-10

Data Sharing

IPD Sharing
Will not share

Locations