Thulium Fiber Laser (TFL) vs Thulio Pulsed Thulium:YAG (p-Tm:YAG)

NCT06721975 | Recruiting FDA Device

• 2 other identifiers: 810115314954-00001
• Study Type: interventional
• Target: 50
• Locations: 1 country
• Sites: 1

Brief Summary

This research study is being conducted to assess the ability and efficiency of two laser systems to break up kidney stones during ureteroscopy with laser lithotripsy for kidney stone treatment.

Conditions

Kidney Stones; Nephrolithiasis

Keywords

laser lithotripsy; laser; nephrolithiasis; kidney stone

Outcome Measures

Primary Outcomes (1)

• The amount of energy used per given stone volume

  The primary object is to assess the stone dusting ablation efficiency - efficiency will be defined by amount of laser energy used per stone volume (Joules/mm3)

  From enrollment to the follow up imaging at 6-12 weeks

Secondary Outcomes (2)

• Laser ablation speed (volume of stone/lasing time = mm3/sec)

  From enrollment to the follow up imaging at 6-12 weeks

• Post-operative complications compared between the two laser systems

  From enrollment to the follow up imaging at 6-12 weeks

Study Arms (2)

p-Tm:YAG laser system

EXPERIMENTAL

This is a new laser system developed by Dornier, the Thulio pulsed Thulium:YAG (p-Tm:YAG)

Device: Thulio pulsed Thulium:YAG (p-Tm:YAG)

TFL laser system

ACTIVE COMPARATOR

The thulium fiber laser (TFL) has demonstrated effectiveness in this procedure.

Device: Thulium Laser Fiber (TFL)

Interventions

Thulio pulsed Thulium:YAG (p-Tm:YAG) DEVICE

A new laser system developed by Dornier, the Thulio pulsed Thulium:YAG (p-Tm:YAG ) is beginning to be studied in vitro and in vivo. Dornier Thulio p-Tm:YAG may represent an attractive new laser platform, with comparable properties to TFL including decreased retropulsion, smaller dust, and improved ablation efficiency relative to Ho:YAG.

p-Tm:YAG laser system

Thulium Laser Fiber (TFL) DEVICE

The thulium fiber laser (TFL) has demonstrated effectiveness in this procedure

TFL laser system

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Solitary renal stone 7 to 20 mm in size or in the case of multiple stones the conglomerate diameter (additive maximal diameter of all stones on axial imaging of computed tomography) of 7-20 mm is required
• Must be a suitable operative candidate for flexible ureteroscopy per American Urological Association guidelines
• Must be able to give consent
• Bilateral ureteroscopy will be permitted but only the first side (per surgeon discretion) will be included in the study
• Surgeons participating in the study must be urological attending surgeons or fellows with subspecialty training in Endourology

You may not qualify if:

• Concomitant stones in the ureter
• Prior ipsilateral upper urinary tract reconstructive procedures or history of ipsilateral ureteral stricture
• Prior radiotherapy to the abdomen or pelvis
• Neurogenic bladder or spinal cord injury
• Pregnancy
• Untreated UTI

Sponsors & Collaborators

• University of California, San Diego: lead
• Dornier MedTech Systems: collaborator

Study Sites (1)

University of California, San Diego

San Diego, California, 92122, United States

RECRUITING

Related Publications (28)

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• Ventimiglia E, Pauchard F, Gorgen ARH, Panthier F, Doizi S, Traxer O. How do we assess the efficacy of Ho:YAG low-power laser lithotripsy for the treatment of upper tract urinary stones? Introducing the Joules/mm3 and laser activity concepts. World J Urol. 2021 Mar;39(3):891-896. doi: 10.1007/s00345-020-03241-9. Epub 2020 May 27.

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• Stern KL, Borgert BJ, Wolf JS Jr. Steerable Ureteroscopic Renal Evacuation (SURE) for Large Renal Stones: A Multi-Institutional Center Study. J Endourol. 2023 Aug 28;37(11):1179-83. doi: 10.1089/end.2023.0424. Online ahead of print.

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• Solano C, Corrales M, Panthier F, Candela L, Doizi S, Traxer O. Navigating urolithiasis treatment: assessing the practicality and performance of thulium fiber laser, holmium YAG, and thulium YAG in real-world scenarios. World J Urol. 2023 Oct;41(10):2627-2636. doi: 10.1007/s00345-023-04487-9. Epub 2023 Jul 20.

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• Sierra A, Corrales M, Kolvatzis M, Traxer O. Initial clinical experience with the thulium fiber laser from Quanta System: First 50 reported cases. World J Urol. 2022 Oct;40(10):2549-2553. doi: 10.1007/s00345-022-04096-y. Epub 2022 Jul 21.

  PMID: 35861860 BACKGROUND

• Petzold R, Suarez-Ibarrola R, Miernik A. Temperature Assessment of a Novel Pulsed Thulium Solid-State Laser Compared with a Holmium:Yttrium-Aluminum-Garnet Laser. J Endourol. 2021 Jun;35(6):853-859. doi: 10.1089/end.2020.0803. Epub 2020 Dec 3.

  PMID: 33191783 BACKGROUND

• Petzold R, Suarez-Ibarrola R, Miernik A. Gas Bubble Anatomy During Laser Lithotripsy: An Experimental In Vitro Study of a Pulsed Solid-State Tm:YAG and Ho:YAG Device. J Endourol. 2021 Jul;35(7):1051-1057. doi: 10.1089/end.2020.0526. Epub 2020 Dec 22.

  PMID: 33207950 BACKGROUND

• Petzold R, Miernik A, Suarez-Ibarrola R. Retropulsion force in laser lithotripsy-an in vitro study comparing a Holmium device to a novel pulsed solid-state Thulium laser. World J Urol. 2021 Sep;39(9):3651-3656. doi: 10.1007/s00345-021-03668-8. Epub 2021 Mar 23.

  PMID: 33758959 BACKGROUND

• Petzold R, Miernik A, Suarez-Ibarrola R. In Vitro Dusting Performance of a New Solid State Thulium Laser Compared to Holmium Laser Lithotripsy. J Endourol. 2021 Feb;35(2):221-225. doi: 10.1089/end.2020.0525. Epub 2020 Sep 9.

  PMID: 32799650 BACKGROUND

• Patil A, Reddy N, Shah D, Singh A, Ganpule A, Sabnis R, Desai M. High-Power Holmium with MOSES Technology or Thulium Fiber Laser in MiniPerc with Suction: A New Curiosity. J Endourol. 2022 Oct;36(10):1348-1354. doi: 10.1089/end.2021.0915. Epub 2022 Aug 17.

  PMID: 35331003 BACKGROUND

• Panthier F, Solano C, Chicaud M, Kutchukian S, Candela L, Doizi S, Corrales M, Traxer O. Initial clinical experience with the pulsed solid-state thulium YAG laser from Dornier during RIRS: first 25 cases. World J Urol. 2023 Aug;41(8):2119-2125. doi: 10.1007/s00345-023-04501-0. Epub 2023 Jul 6.

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• Negida A. Sample Size Calculation Guide - Part 6: How to calculate the sample size for a non-inferiority or an equivalence clinical trial. Adv J Emerg Med. 2019 Nov 27;4(1):e15. doi: 10.22114/ajem.v0i0.302. eCollection 2020 Winter. No abstract available.

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• Kwok JL, Ventimiglia E, De Coninck V, Corrales M, Sierra A, Panthier F, Pauchard F, Schmid F, Hunziker M, Poyet C, Daudon M, Traxer O, Eberli D, Keller EX. Pulsed thulium:YAG laser-ready to dust all urinary stone composition types? Results from a PEARLS analysis. World J Urol. 2023 Oct;41(10):2823-2831. doi: 10.1007/s00345-023-04549-y. Epub 2023 Aug 16.

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• Kraft L, Petzold R, Suarez-Ibarrola R, Miernik A. In vitro fragmentation performance of a novel, pulsed Thulium solid-state laser compared to a Thulium fibre laser and standard Ho:YAG laser. Lasers Med Sci. 2022 Apr;37(3):2071-2078. doi: 10.1007/s10103-021-03495-8. Epub 2021 Dec 14.

  PMID: 34905141 BACKGROUND

• Korolev D, Akopyan G, Tsarichenko D, Shpikina A, Ali S, Chinenov D, Corrales M, Taratkin M, Traxer O, Enikeev D. Minimally invasive percutaneous nephrolithotomy with SuperPulsed Thulium-fiber laser. Urolithiasis. 2021 Oct;49(5):485-491. doi: 10.1007/s00240-021-01258-2. Epub 2021 Mar 3.

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• Huusmann S, Lafos M, Meyenburg I, Muschter R, Teichmann HO, Herrmann T. Tissue effects of a newly developed diode pumped pulsed Thulium:YAG laser compared to continuous wave Thulium:YAG and pulsed Holmium:YAG laser. World J Urol. 2021 Sep;39(9):3503-3508. doi: 10.1007/s00345-021-03634-4. Epub 2021 Mar 16.

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• Haas CR, Knoedler MA, Li S, Gralnek DR, Best SL, Penniston KL, Nakada SY. Pulse-modulated Holmium:YAG Laser vs the Thulium Fiber Laser for Renal and Ureteral Stones: A Single-center Prospective Randomized Clinical Trial. J Urol. 2023 Feb;209(2):374-383. doi: 10.1097/JU.0000000000003050. Epub 2023 Jan 9.

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• Enikeev D, Grigoryan V, Fokin I, Morozov A, Taratkin M, Klimov R, Kozlov V, Gabdullina S, Glybochko P. Endoscopic lithotripsy with a SuperPulsed thulium-fiber laser for ureteral stones: A single-center experience. Int J Urol. 2021 Mar;28(3):261-265. doi: 10.1111/iju.14443. Epub 2020 Nov 30.

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• Corrales M, Traxer O. Retrograde intrarenal surgery: laser showdown (Ho:YAG vs thulium fiber laser). Curr Opin Urol. 2022 Mar 1;32(2):179-184. doi: 10.1097/MOU.0000000000000971.

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• Bergmann J, Rosenbaum CM, Netsch C, Gross AJ, Becker B. First Clinical Experience of a Novel Pulsed Solid-State Thulium:YAG Laser during Percutaneous Nephrolithotomy. J Clin Med. 2023 Mar 29;12(7):2588. doi: 10.3390/jcm12072588.

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• Azilgareeva, C., Taratkin, M., Petov, V., Korolev, D., Akopyan, G., Dymov, A., et al. (2022). Prospective randomized comparison of SP TFL and Ho:YAG in RIRS for kidney stones: a single-center study. Eur. Urol. 81, S1722-S1723. doi: 10.1016/S0302-2838(22)01252-0.

  BACKGROUND

• Assimos D, Krambeck A, Miller NL, Monga M, Murad MH, Nelson CP, Pace KT, Pais VM Jr, Pearle MS, Preminger GM, Razvi H, Shah O, Matlaga BR. Surgical Management of Stones: American Urological Association/Endourological Society Guideline, PART I. J Urol. 2016 Oct;196(4):1153-60. doi: 10.1016/j.juro.2016.05.090. Epub 2016 May 27.

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MeSH Terms

Conditions

Kidney Calculi; Nephrolithiasis

Condition Hierarchy (Ancestors)

Kidney Diseases; Urologic Diseases; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Urogenital Diseases; Urolithiasis; Urinary Calculi; Male Urogenital Diseases; Calculi; Pathological Conditions, Anatomical; Pathological Conditions, Signs and Symptoms

Central Study Contacts

Jade McDermott, BS

CONTACT

858-777-9721; j3mcdermott@health.ucsd.edu

Roger L Sur, MD

CONTACT

(858) 657-7876; rlsur@health.ucsd.edu

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Professor of Urology

Model Details: Patient will be randomized to one of the following two groups: 1. p-Tm:YAG laser system 2. TFL laser system

Study Record Dates

• First Submitted: November 25, 2024
• First Posted: December 6, 2024
• Study Start: August 1, 2024
• Primary Completion (Estimated): August 1, 2026
• Study Completion (Estimated): December 31, 2026
• Last Updated: August 3, 2025

Record last verified: 2025-08

Locations

US (1)