MOSES Lithotripsy Technology Applied to Stone Fragmentation During Ureteroscopy

Sponsor
Indiana University (Other)
Overall Status
Recruiting
CT.gov ID
NCT03995758
Collaborator
(none)
32
1
2
48.3
0.7

Study Details

Study Description

Brief Summary

To determine if the effects of MOSES laser modulation technology can improve the safety and efficiency to laser fragmentation resulting in decreased total laser time, reduced potential for injury to the patient, and total OR time and utilization.

Condition or Disease Intervention/Treatment Phase
  • Device: MOSES
N/A

Detailed Description

MOSES technology was developed by Lumenis Ltd to maximize the lithotripsy potential of high powered lasers. Typically, a holmium laser unit is used to treat kidney a ureteral stones that are too large to remove en block. Laser lithotripsy allows for a large stone to be partitioned into smaller fragments that can be removed with an endoscopic basket device. Holmium technology has existed for more than 20 years, however, low total power (40 watt) and minimal modulations (Joules and Hertz) of the laser energy by the laser units limited the capacity to improve lithotripsy efficiency.

With the advent of high power (120 watt) lasers with 4 laser cores and developments in software to modulate the laser energy, many more options have emerged for laser lithotripsy of kidney and ureteral stones. At Indiana University Health Physicians Urology, the laser units used for nephrolithotripsy are engineered and produced by Lumenis Ltd. These units are fitted with MOSES technology. Standard laser lithotripsy or MOSES laser lithotripsy can be performed using the same unit and during the same case by simple turning MOSES on or off on the laser touch screen (image 1). MOSES is propriety technology that is software based modulation of the laser energy delivered from the holmium::yag laser source. The software changes the pulsed laser to have two peaks of energy - one to displace the water in front of the stone and the second to deliver the laser energy to the stone. Holmium laser energy dissipates quickly in water, so the displacement of water in front of the stone means more energy is delivered to the stone. With more energy delivery, stone fragmentation is expected to occur more rapidly.

When treating kidney or ureteral stones, there are two distinct surgical approaches. One technique is to use laser lithotripsy to break a stone into tiny pieces called dusting. Dusting technique attempts to turn a stone into a slurry of 2mm or less stone fragments that the patient can pass spontaneously. There are some urologist who promote the use of MOSES technology to improve the efficiency of the dusting technique and reduce operative time. Another approach to endoscopic stone surgery is to laser the stone into fragments to remove with a basket. There is far less laser energy used in this process, however, hard stones and larger stones can take time to fragment. Based on the dusting ureteroscopy data, MOSES technology could still improve fragmentation efficiency and reduce overall operative time.

This is a blinded study. The research coordinator will present to the OR prior to the surgeon to meet with OR staff. At this time, the coordinator will inform the OR staff which group the participant has been randomly assigned. OR staff will be educated to set the laser as instructed by the surgeon but not share whether the MOSES laser lithotripsy is being used. Surgeons will not be aware of the group assignment. The surgeons are only able to adjust the laser energy settings between 0.4-1.0 joules and 4-15 hertz. To control for stone fragment size, surgeons will have to use an 13 french ureteral access sheath independent of ureteral diameter. The MOSES setting is turned on with a touch pad attached to the laser unit. Once the surgeon is ready to laser fragment the stone, the laser will be activated and with the surgeon provided laser energy settings. The laser technician/nurse will follow randomization and add or remove the MOSES option. The surgeons will not be informed if using standard laser or MOSES augmented laser technology. At the conclusion of laser fragmentation, stone basket extraction will occur and once all fragments are removed, the patient will have a ureteral stent placed, awoken, extubated and transferred to the post anesthesia recovery unit. Objective data about laser settings, utilization time and total energy will be obtained at the conclusion of the case. Additionally, the circulating team will record the total OR time. Other variables of interest include blood loss, blood transfusion requirements and complications (utilizing Clavien-Dindo classification) with an expected rate of approximately 1-2%. Subjective grading of stone movement during laser fragmentation as well as stone migration will be recorded.

In addition to the intraoperative variables mentioned above, clinical information including stone size, location, and stone analysis will be recorded.

Study Design

Study Type:
Interventional
Anticipated Enrollment :
32 participants
Allocation:
Randomized
Intervention Model:
Parallel Assignment
Intervention Model Description:
The patients will be randomized 1:1 to either standard laser lithotripsy or MOSES laser lithotripsy.The patients will be randomized 1:1 to either standard laser lithotripsy or MOSES laser lithotripsy.
Masking:
Single (Investigator)
Masking Description:
Surgeons will not be aware of the group assignment.
Primary Purpose:
Treatment
Official Title:
MOSES Lithotripsy Technology Applied to Stone Fragmentation During Ureteroscopy
Actual Study Start Date :
Jun 6, 2019
Anticipated Primary Completion Date :
Jun 11, 2022
Anticipated Study Completion Date :
Jun 15, 2023

Arms and Interventions

Arm Intervention/Treatment
Active Comparator: Standard laser lithotripsy

standard of care for stone fragmentation in ureteroscopy

Device: MOSES
software based modulation of the laser energy delivered from the homium laser source. The software changes the pulsed laser to have two peaks of energy - one to displace water in front of the stone and a second to deliver the laser energy to the stone

Active Comparator: MOSES laser lithotripsy

MOSES technology used for stone fragmentation in ureteroscopy

Device: MOSES
software based modulation of the laser energy delivered from the homium laser source. The software changes the pulsed laser to have two peaks of energy - one to displace water in front of the stone and a second to deliver the laser energy to the stone

Outcome Measures

Primary Outcome Measures

  1. The primary endpoint of interest will be reduction in total laser time [Postoperative day 1]

    total laser time

  2. The primary endpoint of interest will be reduction in total OR time [Postoperative day 1]

    total surgery time

Secondary Outcome Measures

  1. Complication rates using Clavien-Dindo score [30 days]

    Clavien Classification of Surgical Complications: Grade I: Any deviation from the normal post-operative course without the need for pharmacological treatment or surgical, endoscopic, and radiological interventions. Allowed therapeutic regimens are: drugs as antiemetics, antipyretics, analgesics, diuretics, electrolytes, and physiotherapy. This grade also includes wound infections opened at bedside. Grade II: Requiring pharmacological treatment with drugs other than such allowed for Grade I complications. Blood transfusions and total parenteral nutrition are also included. Grade III: Requiring surgical, endoscopic or radiological intervention. Grade IIIa: Intervention not under general anesthesia Grade IIIb: Intervention under general anesthesia Grade IV: Life-threatening complication (including CNS complications) requiring IC/ICU management. Grade IVa: Single organ dysfunction (including dialysis) Grade IVb: Multi-organ dysfunction Grade V: Death of a patient

Eligibility Criteria

Criteria

Ages Eligible for Study:
18 Years and Older
Sexes Eligible for Study:
All
Accepts Healthy Volunteers:
No
Inclusion Criteria:
  • 18 years of age

  • Kidney or ureteral stone requiring laser lithotripsy fragmentation

Exclusion Criteria:
  • < 18 years of age

  • Infectious, struvite stones.

  • Atypical collecting system anatomy that prolongs the case (ureteral stricture, malrotated kidney, infundibular stenosis, ureteral duplication)

Contacts and Locations

Locations

Site City State Country Postal Code
1 Indiana University Health Physicians Urology Indianapolis Indiana United States 46202

Sponsors and Collaborators

  • Indiana University

Investigators

None specified.

Study Documents (Full-Text)

None provided.

More Information

Publications

None provided.
Responsible Party:
Marcelino Rivera, Principal Investigator, Indiana University
ClinicalTrials.gov Identifier:
NCT03995758
Other Study ID Numbers:
  • 1901990102
First Posted:
Jun 24, 2019
Last Update Posted:
Aug 5, 2021
Last Verified:
Jul 1, 2021
Individual Participant Data (IPD) Sharing Statement:
No
Plan to Share IPD:
No
Studies a U.S. FDA-regulated Drug Product:
No
Studies a U.S. FDA-regulated Device Product:
Yes
Additional relevant MeSH terms:

Study Results

No Results Posted as of Aug 5, 2021