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Tamsulosin and Intraureteral Aminophylline for Ureteral Access During RIRS (TAM-AMIN-UAS)

2026년 5월 28일 업데이트: Hany Fathy Badawy, MD, Beni-Suef University

Comparative Efficacy of Tamsulosin, Intraureteral Aminophylline, and Their Combination in Facilitating Ureteral Access During Retrograde Intrarenal Surgery: A Multicenter Randomized Controlled Trial.

This multicenter randomized controlled trial will evaluate whether preoperative tamsulosin, intraureteral aminophylline, or their combination can improve ureteral access during primary retrograde intrarenal surgery for renal stones. Adult patients with unilateral renal stones measuring 2 cm or less and planned placement of a 10/12 Fr ureteral access sheath will be randomly assigned to one of four groups in a 2x2 factorial design. Participants will receive either tamsulosin or placebo for 7 days before surgery and either intraureteral aminophylline or intraureteral placebo during the procedure. The main outcome will be successful first-attempt placement of the planned 10/12 Fr ureteral access sheath after study solution instillation, without active ureteral dilatation, sheath downsizing, prestenting with deferred surgery, or abandonment of the procedure due to access failure.

연구 개요

상태

모병

정황

개입 / 치료

상세 설명

Retrograde intrarenal surgery is a commonly used minimally invasive procedure for the treatment of renal stones. Successful completion of the procedure may require placement of a ureteral access sheath. However, ureteral access sheath insertion can be difficult in some patients because of ureteral resistance or spasm, which may lead to ureteral trauma, active ureteral dilatation, prestenting with delayed surgery, or inability to complete the planned procedure.

This study is designed to compare systemic, local, and combined pharmacologic strategies for facilitating ureteral access during primary retrograde intrarenal surgery. Tamsulosin is an alpha-1 adrenergic receptor blocker that may reduce ureteral tone when given before surgery. Aminophylline is a smooth-muscle relaxant that may reduce ureteral spasm when administered locally into the ureter during the procedure.

This is a prospective, multicenter, randomized, double-blind, placebo-controlled, parallel-group trial with a 2x2 factorial design. Eligible adult patients with unilateral renal stones measuring 2 cm or less who are scheduled for primary retrograde intrarenal surgery with planned 10/12 Fr ureteral access sheath placement will be randomized in a 1:1:1:1 ratio. The four treatment combinations are: placebo capsule plus intraureteral placebo, tamsulosin capsule plus intraureteral placebo, placebo capsule plus intraureteral aminophylline, and tamsulosin capsule plus intraureteral aminophylline.

Patients assigned to tamsulosin will receive tamsulosin 0.4 mg once daily for 7 days before surgery, while patients assigned to placebo will receive a matching placebo capsule. During surgery, the assigned intraureteral solution will be instilled through an open-end ureteric catheter positioned in the distal ureter on the study side. After a standardized 5-minute waiting period, one controlled attempt will be made to place the planned 10/12 Fr ureteral access sheath.

The primary endpoint is successful first-attempt placement of the planned 10/12 Fr ureteral access sheath after study solution instillation, without active ureteral dilatation, sheath downsizing, prestenting with deferred retrograde intrarenal surgery, or abandonment of the procedure due to access failure. If the planned sheath cannot be inserted safely, management will proceed according to a predefined rescue pathway, including active ureteral dilatation if considered safe or ureteral stenting with deferred surgery. Forced sheath advancement against marked resistance will be avoided.

Secondary outcomes will assess flexible ureteroscope advancement, need for rescue maneuvers, access-related ureteral injury, operative outcomes, postoperative pain, complications, hospital stay, and stone-free status during follow-up.

연구 유형

중재적

등록 (추정된)

322

단계

  • 2 단계

연락처 및 위치

이 섹션에서는 연구를 수행하는 사람들의 연락처 정보와 이 연구가 수행되는 장소에 대한 정보를 제공합니다.

연구 연락처

연구 장소

  • 이집트
    • Aswan Governorate
      • Aswān, Aswan Governorate, 이집트
        • 모병
        • Department of Urology- Aswan University Hospitals
        • 연락하다:
          • Ahmed
        • 연락하다:
        • 수석 연구원:
          • Ahmed S Ahmed, MD
    • Beni Suweif Governorate
      • Banī Suwayf, Beni Suweif Governorate, 이집트
        • 모병
        • Department of Urology- Beni-Suef University Hospitals
        • 수석 연구원:
          • Hany F Badawy, MD
        • 연락하다:
    • Sohag Governorate
      • Sohag, Sohag Governorate, 이집트
        • 모병
        • Urology Department- Sohag university Hospital
        • 연락하다:
        • 수석 연구원:
          • Ahmed M Elsherif, MD

참여기준

연구원은 적격성 기준이라는 특정 설명에 맞는 사람을 찾습니다. 이러한 기준의 몇 가지 예는 개인의 일반적인 건강 상태 또는 이전 치료입니다.

자격 기준

공부할 수 있는 나이

  • 성인
  • 고령자

건강한 자원 봉사자를 받아들입니다

아니

설명

Inclusion Criteria:

  • Age 18 years or older.
  • Unilateral renal stone 2 cm or less in maximal diameter on preoperative imaging.
  • Scheduled for primary retrograde intrarenal surgery.
  • Ability to provide written informed consent.

Exclusion Criteria:

  • Prior ureteral stenting on the study side.
  • Bilateral same-session retrograde intrarenal surgery.
  • Concomitant ureteral stone requiring primary semirigid ureteroscopy as the main procedure.
  • Known ureteral stricture or prior ureteral reconstructive surgery on the study side.
  • Active urinary tract infection or untreated positive urine culture.
  • Pregnancy.
  • Known allergy or contraindication to tamsulosin or aminophylline.
  • Significant cardiac arrhythmia, uncontrolled ischemic heart disease, seizure disorder, or hyperthyroidism.
  • Severe hepatic impairment.
  • Inability to comply with the 7-day preoperative medication protocol.

공부 계획

이 섹션에서는 연구 설계 방법과 연구가 측정하는 내용을 포함하여 연구 계획에 대한 세부 정보를 제공합니다.

연구는 어떻게 설계됩니까?

디자인 세부사항

  • 주 목적: 치료
  • 할당: 무작위
  • 중재 모델: 요인 할당
  • 마스킹: 네 배로

무기와 개입

참가자 그룹 / 팔
개입 / 치료
위약 비교기: Placebo Capsule Plus Intraureteral Placebo
Participants will receive a matching placebo capsule once daily for 7 days before retrograde intrarenal surgery and intraureteral placebo using normal saline 0.9% during the procedure before attempted placement of the planned 10/12 Fr ureteral access sheath.
의약품: Placebo Capsule
Matching placebo capsule for tamsulosin, taken once daily for 7 days before retrograde intrarenal surgery.
의약품: Intraureteral Placebo
Normal saline 0.9% to a total volume of 20 mL will be instilled intraureterally through an open-end ureteric catheter positioned in the distal ureter on the study side. After a standardized 5-minute waiting period, one controlled attempt will be made to place the planned 10/12 Fr ureteral access sheath.
실험적: Tamsulosin Plus Intraureteral Placebo
Participants will receive tamsulosin 0.4 mg capsule once daily for 7 days before retrograde intrarenal surgery and intraureteral placebo using normal saline 0.9% during the procedure before attempted placement of the planned 10/12 Fr ureteral access sheath.
의약품: Intraureteral Placebo
Normal saline 0.9% to a total volume of 20 mL will be instilled intraureterally through an open-end ureteric catheter positioned in the distal ureter on the study side. After a standardized 5-minute waiting period, one controlled attempt will be made to place the planned 10/12 Fr ureteral access sheath.
의약품: Tamsulosin
Tamsulosin 0.4 mg capsule once daily for 7 days before retrograde intrarenal surgery.
실험적: Placebo Capsule Plus Intraureteral Aminophylline
Participants will receive a matching placebo capsule once daily for 7 days before retrograde intrarenal surgery and intraureteral aminophylline solution during the procedure before attempted placement of the planned 10/12 Fr ureteral access sheath.
의약품: Placebo Capsule
Matching placebo capsule for tamsulosin, taken once daily for 7 days before retrograde intrarenal surgery.
의약품: Intraureteral Aminophylline
Aminophylline 250 mg/10 mL will be diluted with 10 mL normal saline 0.9% to a total volume of 20 mL. The solution will be instilled intraureterally through an open-end ureteric catheter positioned in the distal ureter on the study side. After a standardized 5-minute waiting period, one controlled attempt will be made to place the planned 10/12 Fr ureteral access sheath.
실험적: Tamsulosin Plus Intraureteral Aminophylline
Participants will receive tamsulosin 0.4 mg capsule once daily for 7 days before retrograde intrarenal surgery and intraureteral aminophylline solution during the procedure before attempted placement of the planned 10/12 Fr ureteral access sheath.
의약품: Tamsulosin
Tamsulosin 0.4 mg capsule once daily for 7 days before retrograde intrarenal surgery.
의약품: Intraureteral Aminophylline
Aminophylline 250 mg/10 mL will be diluted with 10 mL normal saline 0.9% to a total volume of 20 mL. The solution will be instilled intraureterally through an open-end ureteric catheter positioned in the distal ureter on the study side. After a standardized 5-minute waiting period, one controlled attempt will be made to place the planned 10/12 Fr ureteral access sheath.

연구는 무엇을 측정합니까?

주요 결과 측정

결과 측정
측정값 설명
기간
Successful First-Attempt 10/12 Fr Ureteral Access Sheath Placement
기간: During the index retrograde intrarenal surgery procedure
Successful placement of the planned 10/12 Fr ureteral access sheath at the first standardized post-instillation attempt during primary retrograde intrarenal surgery, without active ureteral dilatation, sheath downsizing, prestenting with deferred retrograde intrarenal surgery, or abandonment of the procedure due to access failure.
During the index retrograde intrarenal surgery procedure

2차 결과 측정

결과 측정
측정값 설명
기간
Requirement for Active Ureteral Dilatation
기간: During the index retrograde intrarenal surgery procedure
Proportion of participants requiring active ureteral dilatation after unsuccessful first standardized post-instillation placement of the planned 10/12 Fr ureteral access sheath.
During the index retrograde intrarenal surgery procedure
Requirement for Prestenting and Staged RIRS
기간: During the index retrograde intrarenal surgery procedure
Proportion of participants requiring ureteral stenting with deferred retrograde intrarenal surgery because of unsuccessful or unsafe ureteral access during the index procedure.
During the index retrograde intrarenal surgery procedure
Access-Related Ureteral Injury
기간: During the index retrograde intrarenal surgery procedure
Occurrence of access-related ureteral injury during ureteral access sheath insertion, graded endoscopically where feasible.
During the index retrograde intrarenal surgery procedure
Postoperative Pain Score
기간: Within 24 hours after the index procedure
Postoperative pain intensity assessed after the index procedure using the study pain assessment method.
Within 24 hours after the index procedure

공동 작업자 및 조사자

여기에서 이 연구와 관련된 사람과 조직을 찾을 수 있습니다.

스폰서

Beni-Suef University

수사관

  • 수석 연구원: Hany F Badawy, MD, Faculty of Medicine, Beni-Suef University

연구 기록 날짜

이 날짜는 ClinicalTrials.gov에 대한 연구 기록 및 요약 결과 제출의 진행 상황을 추적합니다. 연구 기록 및 보고된 결과는 공개 웹사이트에 게시되기 전에 특정 품질 관리 기준을 충족하는지 확인하기 위해 국립 의학 도서관(NLM)에서 검토합니다.

연구 주요 날짜

연구 시작 (실제)

2026년 5월 6일

기본 완료 (추정된)

2027년 4월 1일

연구 완료 (추정된)

2027년 5월 1일

연구 등록 날짜

최초 제출

2026년 5월 28일

QC 기준을 충족하는 최초 제출

2026년 5월 28일

처음 게시됨 (실제)

2026년 6월 3일

연구 기록 업데이트

마지막 업데이트 게시됨 (실제)

2026년 6월 3일

QC 기준을 충족하는 마지막 업데이트 제출

2026년 5월 28일

마지막으로 확인됨

2026년 5월 1일

추가 정보

이 연구와 관련된 용어

키워드

추가 관련 MeSH 약관

기타 연구 ID 번호

  • FMBS050526BadawyTAMAMINUAS
  • FMBSUREC/05052026/Badawy (기타 식별자: FM-BSU REC)

개별 참가자 데이터(IPD) 계획

개별 참가자 데이터(IPD)를 공유할 계획입니까?

아니요

IPD 계획 설명

Individual participant data will not be shared because the study involves individual-level clinical and operative data from a multicenter interventional trial. Only aggregated, de-identified study results will be reported in publications. Any future data sharing request will require approval from the Research Ethics Committee, Faculty of Medicine, Beni-Suef University, and the participating study centers.

약물 및 장치 정보, 연구 문서

미국 FDA 규제 의약품 연구

아니

미국 FDA 규제 기기 제품 연구

아니

이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .

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