Sham-Controlled Prospective Study Characterizing Erectile Tissue Ultrasound Changes Resulting From Penile LiSWT

Not Applicable

Completed

• Conditions: Erectile Dysfunctions
• Interventions: Device: Sham; Device: Low intensity shockwave therapy (LiSWT)

• Registration Number: NCT06600893
• Lead Sponsor: San Diego Sexual Medicine

Brief Summary

The primary goal of this single blind, prospective sham-controlled clinical trial is to assess safety and efficacy of low intensity shockwave therapy (LiSWT) to improve erectile function in men 21-80 years of age with erectile dysfunction naive to radial ballistic acoustic wave and LiSWT. The main questions it aims to answer are:

* Does homogeneity/inhomogeneity of corporal cavernosal tissue improve using Grayscale ultrasound (GUS) when comparing sham to active treatment groups?

* Do peak systolic velocity (PSV) and end diastolic velocity (EDV) improve using color duplex Doppler ultrasound when comparing sham to active treatment groups?

* Do the International Index of Erectile Function (IIEF), its erectile function domain (IIEF-EF) and question 3 of the Sexual Encounter Profile (SEP) improve comparing sham to active treatment groups?

Detailed Description

This is a single site sham-controlled clinical trial to be conducted at San Diego Sexual Medicine in San Diego, California. Subjects meeting inclusion and exclusion criteria will be randomized to one of two arms, each 2:1 active to sham, treated in 3-week cycles. Arm 1 consists of 5000 shocks the first week and two weeks off for each of three treatment cycles. Arm 2 is made up of 5000 shocks the first week and 3000 active shocks the second and third weeks followed by three weeks without treatment, and then 5000, 3000 and 3000 shocks again over the next three weeks. Each of these is followed by the first follow-up visit at 20 weeks after the first treatment, when GUS and DUS is repeated and validated instruments completed, at which time treatment will be unblinded. SEP diaries will be completed during sexual activity in the screening period and during the 4 weeks prior to the follow up visit. Those subjects assigned to sham will be crossed over to the opposite arm for active treatment (arm 1 sham goes to arm 2 open label and arm 2 sham to arm 1 open label) and begin active treatment with decreased intervals between shocks and therefore decreased number of shocks needed, with 3500 rather than 5000 shocks and 2000 rather than 3000 shocks at a lower frequency at that visit after completing the follow up procedures. Subjects assigned initially to the active arm will have a second follow up 32 weeks after the first treatment, and complete SEP diaries during the 4 weeks preceding this visit. GUS and DUS is performed and validated instruments completed at the last follow up.

Study Timeline

• Study Start: 2019-08-05
• Primary Completion: 2022-06-22
• Study Completion: 2023-04-07
• Status Verified: 2024-09
• Study First Submitted: 2024-09-14
• Study First Submitted QC: 2024-09-14
• Last Update Submitted: 2024-09-14
• Study First Posted: 2024-09-19
• Last Update Posted: 2024-09-19

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 35

Inclusion Criteria

1. Subject provides written informed consent and HIPAA authorization before any study procedures are conducted;
2. Subject is male;
3. Subject is aged 21-80 years;
4. Subject is in a relationship with a female partner for at least 3 months;
5. Subject has a body mass index (BMI) < 37 kg/m2;
6. Subject has erectile dysfunction;
7. Subject has testosterone ≥ 300;
8. Subject has a prostate specific antigen (PSA) < 4.0;
9. Subject is willing to attempt sexual activity at least 4 times during the screening period and 4 weeks before each follow-up visit;
10. Subject is willing to stop all erectile function aids (e.g. prescription and non-prescription medications, injections, vacuum erection devices, constriction ring) during the screening period and 4 weeks before each follow-up visit;
11. Subject agrees to comply with the study procedures and visits.

Exclusion Criteria

1. Subject has been treated with acoustic wave previously;
2. Subject has a pacemaker or implanted defibrillator;
3. Subject has clinically significant findings on physical examination;
4. Subject has sciatica or severe back pain;
5. Subject has uncontrolled hypertension;
6. Subject has uncontrolled hypogonadism;
7. Subject is unwilling to maintain testosterone replacement therapy if currently using testosterone to treat hypogonadism;
8. Subject scores ≥ 26 on the IIEF;
9. Subject has homogenous corpora cavernosa on grey scale ultrasound;
10. Subject has any chronic medical condition or psychologic disorder that the Principal Investigator feels makes him ineligible for the study;
11. Subject has lesions or active infections on the penis or perineum;
12. Subject is unwilling to remove piercings from the genital region;
13. Subject has a history of substance abuse within 12 months prior, or consuming > 14 alcoholic drinks per week;
14. Subject has received an investigational drug within 30 days prior to signing consent;
15. Subject has received platelet rich plasma (PRP) within 3 months of signing consent;
16. Subject has received stem cell within 6 months of signing consent;
17. Subject has any condition or exhibits behavior that indicates to the Principal Investigator that the Subject is unlikely to be compliant with study procedures and visits.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Sham Arm 1-Simulated Low Intensity Shockwave Therapy	Sham	Using the shockwave device, 5000 simulated low intensity shockwave therapy delivered week 0, week 3, week 6
Active Arm 1- Low Intensity Shockwave Therapy	Low intensity shockwave therapy (LiSWT)	Using the shockwave device, 5000 low intensity shockwave therapy delivered week 0, week 3, week 6
Sham Arm 2 - Simulated Low Intensity Shockwave Therapy	Sham	Using the shockwave device, 5000 simulated low intensity shockwave therapy delivered week 0, 3000 week 1, 3000 week 3, 5000 week 6, 3000 week 7, 3000 week 8
Active Arm 2 - Low Intensity Shockwave Therapy	Low intensity shockwave therapy (LiSWT)	Using the shockwave device, 5000 low intensity shockwave therapy delivered week 0, 3000 week 1, 3000 week 3, 5000 week 6, 3000 week 7, 3000 week 8

Primary Outcome Measures

Name	Time	Method
Grayscale ultrasound (GUS)	Baseline to follow up visit 1 at week 20, and follow up visit 2 at week 32 for those assigned initially to the active arm and week 40 to those initially assigned to sham	Changes from low intensity shockwave treatment using Grayscale ultrasound to assess erectile tissue homogeneity of the corpora cavernosa comparing sham and active treatment groups
Duplex Doppler ultrasound (DUS)	Baseline to follow up visit 1 at week 20, and follow up visit 2 at week 32 for those assigned initially to the active arm and week 40 to those initially assigned to sham	Changes from low intensity shockwave treatment in peak systolic velocity (PSV) and end diastolic velocity (EDV) using color duplex Doppler ultrasound comparing sham and active treatment groups

Secondary Outcome Measures

Name	Time	Method
International Index of Erectile Function (IIEF)	Baseline to follow up visit 1 at week 20, and follow up visit 2 at week 32 for those assigned initially to the active arm and week 40 to those initially assigned to sham	Changes in IIEF, a validated patient reported outcome instrument used to assess sexual function will be compared from baseline to both follow up visit. This has a 4 week recall.
IIEF Erectile Function Domain (IIEF-EF)	Baseline to follow up visit 1 at week 20, and follow up visit 2 at week 32 for those assigned initially to the active arm and week 40 to those initially assigned to sham	Changes in the erectile function domain, IIEF-EF, used specifically to assess erectile function, will be compared from baseline to both follow up visit. This is a 4 week recall.
Sexual Encounter Profile (SEP)	Completed over the 4 week screening period, and during the 4 weeks prior to each follow up	The SEP diary is a standard assessment completed by a participant after each attempt at sexual activity.

Trial Locations

Locations (1)

San Diego Sexual Medicine; 🇺🇸 San Diego, California, United States