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Urinary RetentionEarly Phase 1NCT05657990

Post Operative Urinary Retention (POUR) Following Thoracic Oncological Surgery

A Early Phase 1 study testing Tamsulosin in people with Urinary Retention, run by Hackensack Meridian Health at 4 sites in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

This is a feasibility study looking at whether the use of Tamsulosin could lower the high incidence of postoperative urinary retention (POUR) in older men who undergo an oncological thoracic surgical procedure for suspected or confirmed cancer. Read more about this study

Who is it for?
Ages 55 years and older, men only
Conditions the study is for
Urinary Retention
What is being tested?
Tamsulosin
Could I receive a placebo?
No, everyone receives an active treatment
How many people
46 participants
Where
4 sitesUnited States
Study dates
3 Apr 2023to Jun 2027
Phase
Early Phase 1
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 55 years and older
  • Men only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Males
  • ≥55 years old
  • Planned thoracic oncological surgical procedure of a video assisted oncological surgical procedure for suspected or confirmed cancer.
  • Surgery scheduled more than 7 days from the time of consent

Who cannot join

  • Using Tamsulosin already
  • Known allergy to Tamsulosin or sulfa drugs
  • Current use of Boceprevir
  • Resting systolic blood pressure <100
  • Orthostatic hypotension of >20mm Hg systolic and/or 10mm Hg diastolic pressure from sitting to standing (after 2 minutes of standing) as measured at the time of consent
  • Known history of hypotension
  • Known diagnosis of congestive heart failure (CHF) and valvular heart disease
  • History of prior prostate surgery (prostatectomy, trans-urethral resection)

Trial locations and contacts

4 sites in 1 country. Contact the study team or a site near you to ask about taking part.

Denise Theiler, RN contact

7327763301

Denise.Theiler@hmhn.org

United States4 sites, 4 recruiting
  • Ocean University Medical Center

    Brick, New Jersey, 08724

    Denise Theiler, 732-776-3301, Denise.Theiler@hmhn.org

    Thomas Bauer, MD

    Recruiting
  • South Ocean University Medical Center

    Manahawkin, New Jersey, 08050

    Denise Theiler, 732-776-3301, Denise.Theiler@hmhn.org

    Thomas Bauer, MD

    Recruiting
  • Jersey Shore University Medical Center

    Neptune City, New Jersey, 07753

    Denise Theiler, RN, 732-776-3301, Denise.Theiler@hmhn.org

    Thomas Bauer, MD

    Recruiting
  • Riverview Medical Center

    Red Bank, New Jersey, 07701

    Denise Theiler, 732-776-3301, Denise.Theiler@hmhn.org

    Ziad Hanhan, MD

    Recruiting

Other trials in United States

About this study

This is a feasibility study looking at whether the use of Tamsulosin could lower the high incidence of postoperative urinary retention (POUR) in older men who undergo an oncological thoracic surgical procedure for suspected or confirmed cancer. In addition, the study will try to identify the time of resumption of presurgical urinary function post Tamsulosin administration.

Read the detailed description

Post-operative urinary retention (POUR) is a significant problem in post-operative patients. The incidence varies, but can reach up to 70%, which most commonly affects older men with enlarged prostates. Even after adjusting for the modifiable risk factors, such as decreased intraoperative foley use and post-operative narcotic use, the incidence remains high. This causes an increase in urinary tract infections, patient discomfort, longer hospital stays, and occasionally further urologic complications. Studies have shown that the use of tamsulosin, an alpha1-adrenergic receptor blocker, may decrease the incidence of POUR by improving urinary flow via relaxation of the smooth muscle tissue. Therefore, the goal of our study is to investigate whether Tamsulosin (Flomax) can be used to lower incidence of POUR in older men undergoing an oncological thoracic surgical procedure.

This is a pilot/feasibility/ early efficacy study to determine if treating men > 55 years of age with Tamsulosin prior to a thoracic oncological surgery will prevent postoperative urinary retention (POUR).

Subjects will be provided with a prescription for Tamsulosin (generic) to be taken 7 days prior to scheduled surgery. For research purposes, post-surgical spontaneous voids will be measured, and any residual urine in the bladder will be assessed and measured using a BladderScanner. This data will be used to determine postoperative urinary retention (POUR). Additionally, standard of care bladder management will be used if the subject did not spontaneously void or had excess urine residual. The algorithm in the table below will guide bladder management decisions.

Being tested
Tamsulosin
Keywords
Urinary Retention, post surgery Urinary Retention, thoracic surgery, spontaneous voiding, bladder retention, Tamsulosin (FlomaxTM), kidney injury, men undergoing thoracic oncological surgical procedure, BladderScanner
Medical subject headings
Urinary Retention

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • TamsulosinDrug

    Also called Flomax

    Tamsulosin 0.4 mg one time daily after a meal for seven days prior to surgery. Post-surgery, an ultrasound of the bladder will be completed approximately six hours after surgery to assess the bladder. If the bladder ultrasound shows more than 400 cc of urine in the bladder, or if the study subject passes urine on his own and there is more than 100cc or less than 400 cc of urine left in the bladder, he will be encouraged to try to pass urine. Study subject will be monitored for two additional hours. If a study subject is unable to pass urine at this time or the bladder has 400 cc or more of urine left in it, he will have an intermittent catheter (in and out) to drain urine. If the bladder has greater than 500 cc (which is approximately 16 and two-thirds ounces) per catheterization for more than 24 hours, and the study subject cannot pass urine, an indwelling catheter may be considered.

Study groups in NCT05657990
Study groupRoleWhat they receive
Pre-operative Tamsulosin administrationExperimentalSubjects will be provided with a prescription for Tamsulosin (generic) to be taken 7 days prior to scheduled surgery for thoracic cancer. Tamsulosin dose is set at 0.4mg/day and should be taken daily for seven days prior to their planned surgery date. Study subjects will also be given a diary to record their daily usage. Study subjects should take Tamsulosin on the day of the surgery with a sip of water.
Receives: Drug: Tamsulosin

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of participants that were able to spontaneously void after surgery completion

    Self-reported void within 6-8 hours post operative

    Measured: 6-8 hours post operative

  2. Time of the void

    Time (number of minutes) to first postoperative spontaneous urination post operation

    Measured: Within 24 hours post operative

  3. Volume of urine

    Volume of urine during the first postoperative spontaneous urination post operation.

    Measured: Within 24 hours post operative

  4. Amount of residual urine

    Patients will receive a bladder scan post their first postoperative spontaneous urination and the amount of residual urine will be measured.

    Measured: Within 24 hours post operative

  5. Number of participants that needed an intervention due to failure to spontaneously urinate

    Patients that did not spontaneously urinate within 6-8 hours post operative will have an intervention. Potential interventions include : a) Prompted voiding and rescanning in 2 hours; b) Intermittent catheterization and patient prompting; c) Indwelling catheter inserted.

    Measured: Within 24 hours post operative

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted20 Dec 2022
  2. Study start3 Apr 2023
  3. Primary completionJun 2027 (estimated)
  4. Study completionJun 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Early Phase 1
Primary purpose
Prevention
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
46 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05657990
Sponsor's protocol ID
Pro2022-0489
Status last verified
Sep 2026
First submitted
12 Dec 2022
Last updated
9 Sep 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Publications

  • 1. Agrawal K, Majhi S, Garg R. Post-operative urinary retention: Review of literature. World J Anesthesiol 2019; 8(1): 1-12 [DOI: 10.5313/wja.v8.i1.1] 2. Akkoc A, Aydin C, Topaktas R, Kartalmis M, Altin S, Isen K, Metin A. Prophylactic effects of alpha-blockers, Tamsulosin and Alfuzosin, on postoperative urinary retention in male patients undergoing urologic surgery under spinal anaesthesia. Int Braz J Urol. 2016 May-Jun;42(3):578-84. doi: 10.1590/S1677-5538.IBJU.2015.0256. PMID: 27286124; PMCID: PMC4920578. 3. Baldani G, Bagry H, Aprikian A, et al. Post-Operative Urinary Retention. Anesthesiology 2009; 110 (5): 1139-1157. 4. Benjamin Wei, Ammar Asban, Rongbing Xie, Zachary Sollie, Luqin Deng, Thomas K. DeLay, William B. Swicord, Rajat Kumar, James K. Kirklin, James Donahue. A prediction model for postoperative urinary retention after thoracic surgery. JTCVS Open. Volume 7. 2021. Pages 359-366. ISSN 2666-2736. https://doi.org/10.1016/j.xjon.2021.05.006. 5. Fisher E, Subramonian K, Omar MI. The role of alpha blockers prior to removal of urethral catheter for acute urinary retention in men. Cochrane Database Syst Rev. 2014 Jun 10;(6):CD006744. doi: 10.1002/14651858.CD006744.pub3. PMID: 24913721.

  • 6. Hollingsworth JM, Rogers MA, Krein SL, et al. Determining the Noninfectious Complications of Indwelling Urethral Catheters. A Systemic Review and Meta-Analysis. Ann Intern Med 2013: 159; 401-410. 7. Jackson J, Davies P, Leggett N, Nugawela MD, Scott LJ, Leach V, Richards A, Blacker A, Abrams P, Sharma J, Donovan J, Whiting P. Systematic review of interventions for the prevention and treatment of postoperative urinary retention. BJS Open. 2018 Nov 19;3(1):11-23. doi: 10.1002/bjs5.50114. PMID: 30734011; PMCID: PMC6354194. 8. Kun Woo Kim, Jae-Ik Lee, Ji Sung Kim, Young-Jin Lee, Won-Jun Choi, Han Jung, Kook-Yang Park, Chul-Hyun Park, Kuk-Hui Son, Risk factors for urinary retention following minor thoracic surgery, Interactive CardioVascular and Thoracic Surgery, Volume 20, Issue 4, April 2015, Pages 486-492, https://doi.org/10.1093/icvts/ivu445 9. Lepor H, Tamsulosin Investigator Group. Phase III Multicenter Placebo-Controlled Study of Tamsulosin in Benign Prostatic Hyperplasia. Urology 1998: 51; 892-900. 10. Madani AH, Aval HB, Mokhtari G, et al. Effectiveness of Tamsulosin in Prevention of Post-Operative Urinary Retention: A Randomized Double-Blind Placebo-Controlled Trial. Braz J of Urol 2014; 40(1): 30-36.

  • 11. Patel JA, Kaufman AS, Howard RS, et al. Risk Factors for Urinary Retention after Laparoscopic Inguinal Hernia Repairs. Surg Endosc 2015: 29; 3140-3145. 12. R Core Team (2020). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. URL https://www.R-project.org/. 13. Simon R. (1989). Optimal Two-Stage Designs for Phase II Clinical Trials. Controlled Clinical Trials 10, 1-10. 14. Sivasankaran MV, Pham T, Divino CM. Incidence and Risk Factors for Urinary Retention Following Laparoscopic Inguinal Hernia Repair. Am J Surg 2014; 207: 288-292. 15. "Tamsulosin hydrochloride-Drug Summary." PDR Prescribers' Digital Reference (2021). Retrieved from https://www.pdr.net/drug-summary/Flomax-tamsulosin-hydrochloride-2893.5649 16. Venkatraman E. Seshan (2018). clinfun: Clinical Trial Design and Data Analysis Functions. R package version 1.0.15. Retrieved from https://CRAN.R-project.org/package=clinfun

Questions about this trial

What is this clinical trial studying?

A Early Phase 1 study testing Tamsulosin in people with Urinary Retention, run by Hackensack Meridian Health at 4 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 9 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 4 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Early Phase 1 (sometimes called Phase 0) studies give a very small amount of a treatment to a few people, mainly to see how the body handles it.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Denise Theiler, RN (7327763301, Denise.Theiler@hmhn.org), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of participants that were able to spontaneously void after surgery completion (time frame: 6-8 hours post operative). The study lists 5 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05657990, which also lists 3 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Sep 2026; AzTrials last refreshed its copy on 7 Nov 2026.

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