Skip to content

Evaluation of Outcomes of Restoring Pelvic Floor Support With TOPAS in Women With Moderate Fecal Incontinence Symptoms

Evaluation of the Outcomes of Restoring Pelvic Floor Support Using TOPAS, AMS Pelvic Floor Support System, in Women With Moderate Fecal Incontinence Symptoms

Status
Completed
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00565136
Acronym
TOPAS
Enrollment
29
Registered
2007-11-29
Start date
2007-09-30
Completion date
2012-12-31
Last updated
2016-05-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Fecal Incontinence

Keywords

Device study, Pelvic floor weakness, Fecal incontinence

Brief summary

The study purpose is to gain experience with the TOPAS system, a minimally- invasively delivered self-fixating mesh for the treatment of pelvic floor weakness in women with symptoms of moderate fecal incontinence

Detailed description

This is a multi-center study under a common protocol. Approximately 20-30 patients will be enrolled across 5 sites in the U.S. The study population is females at least 21 years of age who have attempted but have not been satisfied with conservative therapy for their fecal incontinence symptoms. The study follow-up is two years.

Interventions

DEVICETOPAS

A mesh sling permanently implanted to increase pelvic floor support

Sponsors

ASTORA Women's Health
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
21 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Females at least 21 years of age who have evidence of pelvic floor weakness * Females who attempted but not been satisfied with conservative therapies such as dietary changes, dietary bulking agents, biofeedback, etc. * Subjects, who have an external anal injury, must have some voluntary sphincter control

Exclusion criteria

* Subjects who are unwilling or unable to sign an Informed Consent form * Subjects who are currently pregnant or considering future child-bearing * Subjects who are contraindicated for surgery * Subjects who are allergic to polypropylene mesh * Subjects who are enrolled in a concurrent clinical trial * Subjects with previous implantation of mesh or trauma to the pelvic area * Subjects who engage in anal receptive intercourse * Subjects with a significant evacuation disorder such as chronic constipation * Subjects with Crohn's Disease, ulcerative colitis or chronic diarrhea as the primary cause for fecal incontinence * Subjects who had a hysterectomy within 6 months prior to enrollment * Subjects with vaginal prolapse that passes the hymen * Subjects with complete rectal prolapse * Subjects with a history of pelvic radiation that compromises the anal canal * Subjects who have psychiatric disturbance or debilitation as a possible cause for fecal incontinence * Subjects with a neurological disorder such as amyotrophic lateral sclerosis, multiple sclerosis, or brain tumor as a possible cause for fecal incontinence symptoms * Subjects with an active pelvic infection or a recto-vaginal fistula * Subjects who have not had a negative screening exam for colon cancer within 10 years of enrollment * Subjects who have other inappropriate conditions as determined by the physician

Design outcomes

Primary

MeasureTime frameDescription
Fecal Incontinence Incidence From Baseline (Pre-treatment) Through 24 Months Post-treatmentBaseline (pre-treatment), 6 Week, 3 Month, 6 Month, 12 Month and 24 Month post-treatmentIncludes solid and liquid stools, as measured by the mean rate obtained using a subject-reported bowel diary. The 3 month post-treatment visit was the primary endpoint time period.

Secondary

MeasureTime frameDescription
Fecal Incontinence Symptoms as Measured by Symptom Severity Scale in Fecal IncontinenceBaseline (pre-treatment), 6 Week, 3 Month, 6 Month, 12 Month and 24 Month post-treatmentThe Symptom Severity Scale in Fecal Incontinence is a subject-completed questionnaire that asks about the symptoms of fecal incontinence in the following areas: frequency, stool composition, stool amount, and degree of urgency. The total score is measured on a 0 (best) to 13 (worst) scale. Scores of 1-6, 7-10, and 11-13 were categorized as mild, moderate, and severe fecal incontinence, respectively.
Quality of Life Assessment as Measured by Fecal Incontinence Quality of LifeBaseline (pre-treatment), 3 Month, 6 Month, 12 Month and 24 Month post-treatmentThe Fecal Incontinence Quality of Life Assessment is a subject-completed questionnaire. It is measured in each of four areas of depression (7 items), lifestyle (10 items), coping (9 items), and embarrassment (3 items). Area scores are measured on a 1 (worse) to 4 (best) scale and are each the average of their component individual item scores measured on the same scale.
Pain Intensity as Measured by the Pain Intensity ScaleBaseline (pre-treatment), 6 Week post-treatmentThe Pain Intensity Scale is a subject completed questionnaire. Scores are measured on 0 (no pain) to 10 (worst possible pain) scale.
Intra- and Peri-Surgical Parameters: Length of ProcedureDuration of the device implant procedure
Intra- and Peri-Surgical Parameters: Length of Hospital StayLength of the hospital stay for the device implant procedure
Intra- and Peri-Surgical Parameters: Estimated Blood Loss During Implant ProcedureDuration of the device implant procedure (an average of 23 minutes)
Incidence Rate of Complications During the 24 Month Post-Treatment Follow-up PeriodThrough 24 month post-treatmentComplications are defined as all adverse events reported during the 24 month follow-up period including serious/non-serious events and events related/not related to the device and/or procedure. Incidence rate is calculated as: (total number of adverse events reported in the 24 month follow-up period) / (total number of subjects implanted = 29)
Fecal Incontinence Symptoms as Measured by the Wexner ScoreBaseline (pre-treatment), 6 Week, 3 Month, 6 Month, 12 Month and 24 Month post-treatmentThe Wexner Score (also known as the Cleveland Clinic Florida Incontinence Score) is a subject-completed questionnaire that asks about the frequency of incontinence to gas, liquid, solid, of the need to wear pads, and of lifestyle changes (scored on a frequency scale from 0 (=absent) to 4 (daily). An overall Wexner Score is computed from these five components and a score of 0 means perfect control and 20 means complete incontinence.

Other

MeasureTime frameDescription
Anal Manometry: Rectal First SensationBaseline (pre-treatment), 6 Month post-treatment
Anal Manometry: Maximum Tolerable VolumeBaseline (pre-treatment), 6 Month post-treatment
Pudendal Nerve Terminal Motor LatencyBaseline (pre-treatment), 6 Month post-treatmentPudendal Nerve Terminal Motor Latency is a measure of the time it takes for stimulation of the pudendal nerve to elicit contraction of the pelvic floor muscles and anal sphincter. It is a surrogate marker of pudendal nerve injuries and a means of ascertaining whether anal sphincter weakness is attributable to pudendal nerve injury, sphincter defect, or both.
Anal Manometry: Maximum Resting PressureBaseline (pre-treatment), 6 Month post-treatment
Anal Manometry: Maximum Squeeze PressureBaseline (pre-treatment), 6 Month post-treatment

Countries

United States

Participant flow

Recruitment details

Subjects enrolled at 5 U.S. study centers (medical clinics) from September 2007 to August 2008. The maximum allowed enrollment number from one site is 12.

Pre-assignment details

After signing informed consent and prior to implant, subjects completed a 3-week bowel diary to describe the FI episodes, Fecal Incontinence Quality of Life scale, Wexner Score, Symptom Severity Scale in Fecal Incontinence, pain intensity scale, and dynamic MRI or defecography.

Participants by arm

ArmCount
TOPAS
TOPAS AMS Pelvic Floor Repair System TOPAS : A mesh sling permanently implanted to increase pelvic floor support
29
Total29

Withdrawals & dropouts

PeriodReasonFG000
Overall StudyLost to Follow-up1
Overall StudyProtocol Violation1
Overall StudyWithdrawal by Subject1

Baseline characteristics

CharacteristicTOPAS
Age, Continuous60.6 years
STANDARD_DEVIATION 13.9
Body Mass Index28.1 kg/[m]^2
STANDARD_DEVIATION 7.1
Colonoscopy Results
Abnormal
8 participants
Colonoscopy Results
Normal
15 participants
Colonoscopy Results
Other
0 participants
Colonoscopy Results
Unknown
6 participants
Colonoscopy within past 10 years
No
5 participants
Colonoscopy within past 10 years
Yes
24 participants
Digital Rectal Exam - Anal Resting Tone
No
2 participants
Digital Rectal Exam - Anal Resting Tone
Yes
27 participants
Digital Rectal Exam - Hemorrhoids
No
27 participants
Digital Rectal Exam - Hemorrhoids
Yes
2 participants
Digital Rectal Exam - Soft Tissue Scarring
No
24 participants
Digital Rectal Exam - Soft Tissue Scarring
Yes
5 participants
Endoanal Ultrasound/Magnetic Resonance Imaging - Extent of Sphincter Defect95.0 degrees
STANDARD_DEVIATION 50.2
Endoanal Ultrasound/Magnetic Resonance Imaging - Sphincter Defect
No
19 participants
Endoanal Ultrasound/Magnetic Resonance Imaging - Sphincter Defect
Yes
10 participants
Endoanal Ultrasound or Magnetic Resonance Imaging Completed
Endoanal Ultrasound
23 participants
Endoanal Ultrasound or Magnetic Resonance Imaging Completed
MRI
6 participants
Etiology of Fecal Incontinence
Anorectal trauma
4 participants
Etiology of Fecal Incontinence
Congenital abnormality
0 participants
Etiology of Fecal Incontinence
Idiopathic/Unknown
15 participants
Etiology of Fecal Incontinence
Neurological
2 participants
Etiology of Fecal Incontinence
Obstetric trauma
10 participants
Etiology of Fecal Incontinence
Other
0 participants
Fecal Incontinence Treatment History (failed modalities)
Biofeedback
11 participants
Fecal Incontinence Treatment History (failed modalities)
Diet modification
25 participants
Fecal Incontinence Treatment History (failed modalities)
FI medication
9 participants
Fecal Incontinence Treatment History (failed modalities)
Other
6 participants
Fecal Incontinence Treatment History (failed modalities)
Pelvic surgery
3 participants
Gravidity3.6 pregnancies
STANDARD_DEVIATION 2.1
Height164.8 cm
STANDARD_DEVIATION 5.9
Menopausal Status
Post-menopausal
22 participants
Menopausal Status
Pre-menopausal
7 participants
Number Cesarean Births0.1 deliveries
STANDARD_DEVIATION 0.3
Number of Vaginal Births2.8 deliveries
STANDARD_DEVIATION 1.1
Parity2.9 births
STANDARD_DEVIATION 1.1
Race/Ethnicity, Customized
Other
1 participants
Race/Ethnicity, Customized
White / Caucasian
28 participants
Sex: Female, Male
Female
29 Participants
Sex: Female, Male
Male
0 Participants
Weight76.3 kg
STANDARD_DEVIATION 19.6

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
— / —
other
Total, other adverse events
22 / 29
serious
Total, serious adverse events
5 / 29

Outcome results

Primary

Fecal Incontinence Incidence From Baseline (Pre-treatment) Through 24 Months Post-treatment

Includes solid and liquid stools, as measured by the mean rate obtained using a subject-reported bowel diary. The 3 month post-treatment visit was the primary endpoint time period.

Time frame: Baseline (pre-treatment), 6 Week, 3 Month, 6 Month, 12 Month and 24 Month post-treatment

Population: The FI Bowel Diary was completed by the number of subjects at each visit as follows:~Baseline: N=29, 6 Week: N=26, 3 Month: N=27, 6 Month: N=24, 12 Month: N=23, 24 Month: N=26

ArmMeasureGroupValue (MEAN)Dispersion
TOPASFecal Incontinence Incidence From Baseline (Pre-treatment) Through 24 Months Post-treatmentBaseline (n = 29)6.9 Number of FI episodes/14 day periodStandard Deviation 5.1
TOPASFecal Incontinence Incidence From Baseline (Pre-treatment) Through 24 Months Post-treatment6 Week (n = 26)3.0 Number of FI episodes/14 day periodStandard Deviation 3.2
TOPASFecal Incontinence Incidence From Baseline (Pre-treatment) Through 24 Months Post-treatment3 Month (primary endpoint time period, n = 27)3.7 Number of FI episodes/14 day periodStandard Deviation 4.4
TOPASFecal Incontinence Incidence From Baseline (Pre-treatment) Through 24 Months Post-treatment6 Month (n = 24)3.7 Number of FI episodes/14 day periodStandard Deviation 5
TOPASFecal Incontinence Incidence From Baseline (Pre-treatment) Through 24 Months Post-treatment12 Month (n = 23)3.1 Number of FI episodes/14 day periodStandard Deviation 4.1
TOPASFecal Incontinence Incidence From Baseline (Pre-treatment) Through 24 Months Post-treatment24 Month (n = 26)3.5 Number of FI episodes/14 day periodStandard Deviation 3.4
Secondary

Fecal Incontinence Symptoms as Measured by Symptom Severity Scale in Fecal Incontinence

The Symptom Severity Scale in Fecal Incontinence is a subject-completed questionnaire that asks about the symptoms of fecal incontinence in the following areas: frequency, stool composition, stool amount, and degree of urgency. The total score is measured on a 0 (best) to 13 (worst) scale. Scores of 1-6, 7-10, and 11-13 were categorized as mild, moderate, and severe fecal incontinence, respectively.

Time frame: Baseline (pre-treatment), 6 Week, 3 Month, 6 Month, 12 Month and 24 Month post-treatment

Population: The Symptom Severity Scale in Fecal Incontinence was completed by the number of subjects at each visit as follows:~Baseline: N=29, 6 Week: N=29, 3 Month: N=26, 6 Month: N=25, 12 Month: N=25, 24 Month: N=23

ArmMeasureGroupValue (MEAN)Dispersion
TOPASFecal Incontinence Symptoms as Measured by Symptom Severity Scale in Fecal IncontinenceBaseline (n = 29)10.1 units on a scaleStandard Deviation 1.4
TOPASFecal Incontinence Symptoms as Measured by Symptom Severity Scale in Fecal Incontinence6 Week (n = 29)7.4 units on a scaleStandard Deviation 2.4
TOPASFecal Incontinence Symptoms as Measured by Symptom Severity Scale in Fecal Incontinence3 Month (n = 26)7.2 units on a scaleStandard Deviation 2.7
TOPASFecal Incontinence Symptoms as Measured by Symptom Severity Scale in Fecal Incontinence6 Month (n = 25)7.5 units on a scaleStandard Deviation 2.8
TOPASFecal Incontinence Symptoms as Measured by Symptom Severity Scale in Fecal Incontinence12 Month (n = 25)8.0 units on a scaleStandard Deviation 2.7
TOPASFecal Incontinence Symptoms as Measured by Symptom Severity Scale in Fecal Incontinence24 Month (n = 23)8.1 units on a scaleStandard Deviation 2.4
Secondary

Fecal Incontinence Symptoms as Measured by the Wexner Score

The Wexner Score (also known as the Cleveland Clinic Florida Incontinence Score) is a subject-completed questionnaire that asks about the frequency of incontinence to gas, liquid, solid, of the need to wear pads, and of lifestyle changes (scored on a frequency scale from 0 (=absent) to 4 (daily). An overall Wexner Score is computed from these five components and a score of 0 means perfect control and 20 means complete incontinence.

Time frame: Baseline (pre-treatment), 6 Week, 3 Month, 6 Month, 12 Month and 24 Month post-treatment

Population: The Wexner Score was completed by the number of subjects at each visit as follows:~Baseline: N=29, 6 Week: N=29, 3 Month: N=26, 6 Month: N=25, 12 Month: N=25, 24 Month: N=23

ArmMeasureGroupValue (MEAN)Dispersion
TOPASFecal Incontinence Symptoms as Measured by the Wexner ScoreBaseline (n = 29)13.2 units on a scaleStandard Deviation 2.6
TOPASFecal Incontinence Symptoms as Measured by the Wexner Score6 Week (n = 29)7.6 units on a scaleStandard Deviation 4
TOPASFecal Incontinence Symptoms as Measured by the Wexner Score3 Month (n = 26)7.5 units on a scaleStandard Deviation 4.1
TOPASFecal Incontinence Symptoms as Measured by the Wexner Score6 Month (n = 25)8.5 units on a scaleStandard Deviation 4.4
TOPASFecal Incontinence Symptoms as Measured by the Wexner Score12 Month (n = 25)8.7 units on a scaleStandard Deviation 4
TOPASFecal Incontinence Symptoms as Measured by the Wexner Score24 Month (n = 23)9.9 units on a scaleStandard Deviation 4.4
Secondary

Incidence Rate of Complications During the 24 Month Post-Treatment Follow-up Period

Complications are defined as all adverse events reported during the 24 month follow-up period including serious/non-serious events and events related/not related to the device and/or procedure. Incidence rate is calculated as: (total number of adverse events reported in the 24 month follow-up period) / (total number of subjects implanted = 29)

Time frame: Through 24 month post-treatment

Population: Includes all subjects implanted with the TOPAS device

ArmMeasureGroupValue (NUMBER)
TOPASIncidence Rate of Complications During the 24 Month Post-Treatment Follow-up PeriodDevice and/or Procedure Related Serious Events0.03 events per 24 months/participant
TOPASIncidence Rate of Complications During the 24 Month Post-Treatment Follow-up PeriodAll Adverse Events2.34 events per 24 months/participant
TOPASIncidence Rate of Complications During the 24 Month Post-Treatment Follow-up PeriodDevice and/or Procedure-Related Adverse Events0.66 events per 24 months/participant
TOPASIncidence Rate of Complications During the 24 Month Post-Treatment Follow-up PeriodAll Serious Adverse Events0.17 events per 24 months/participant
Secondary

Intra- and Peri-Surgical Parameters: Estimated Blood Loss During Implant Procedure

Time frame: Duration of the device implant procedure (an average of 23 minutes)

Population: All enrolled/implanted subjects were included in this analysis

ArmMeasureValue (MEAN)Dispersion
TOPASIntra- and Peri-Surgical Parameters: Estimated Blood Loss During Implant Procedure15 mlStandard Deviation 13
Secondary

Intra- and Peri-Surgical Parameters: Length of Hospital Stay

Time frame: Length of the hospital stay for the device implant procedure

Population: All enrolled/implanted subjects were included in this analysis

ArmMeasureValue (MEAN)Dispersion
TOPASIntra- and Peri-Surgical Parameters: Length of Hospital Stay22.6 hoursStandard Deviation 11.6
Secondary

Intra- and Peri-Surgical Parameters: Length of Procedure

Time frame: Duration of the device implant procedure

Population: All enrolled/implanted subjects were included in this analysis

ArmMeasureValue (MEAN)Dispersion
TOPASIntra- and Peri-Surgical Parameters: Length of Procedure23 minutesStandard Deviation 8
Secondary

Pain Intensity as Measured by the Pain Intensity Scale

The Pain Intensity Scale is a subject completed questionnaire. Scores are measured on 0 (no pain) to 10 (worst possible pain) scale.

Time frame: Baseline (pre-treatment), 6 Week post-treatment

Population: The Pain Intensity Scale was completed by the number of subjects at each visit as follows:~Baseline: N=29, 6 Week: N=29

ArmMeasureGroupValue (MEAN)Dispersion
TOPASPain Intensity as Measured by the Pain Intensity ScaleBaseline (n = 29)1.0 units on a scaleStandard Deviation 1.5
TOPASPain Intensity as Measured by the Pain Intensity Scale6 Week (n = 29)0.4 units on a scaleStandard Deviation 0.8
Secondary

Quality of Life Assessment as Measured by Fecal Incontinence Quality of Life

The Fecal Incontinence Quality of Life Assessment is a subject-completed questionnaire. It is measured in each of four areas of depression (7 items), lifestyle (10 items), coping (9 items), and embarrassment (3 items). Area scores are measured on a 1 (worse) to 4 (best) scale and are each the average of their component individual item scores measured on the same scale.

Time frame: Baseline (pre-treatment), 3 Month, 6 Month, 12 Month and 24 Month post-treatment

Population: The Fecal Incontinence Quality of Life Assessment was completed by the number of subjects at each visit as follows:~Baseline: N=29, 3 Month: N=26, 6 Month: N=25, 12 Month: N=25, 24 Month: N=23

ArmMeasureGroupValue (MEAN)Dispersion
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeDepression - Baseline (n = 29)2.7 units on a scaleStandard Deviation 0.8
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeDepression - 3 Month (n = 26)3.3 units on a scaleStandard Deviation 0.7
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeDepression - 6 Month (n = 25)3.2 units on a scaleStandard Deviation 0.8
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeDepression - 12 Month (n = 25)3.3 units on a scaleStandard Deviation 0.8
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeDepression - 24 Month (n = 23)3.3 units on a scaleStandard Deviation 0.7
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeLifestyle - Baseline (n = 29)2.7 units on a scaleStandard Deviation 0.8
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeLifestyle - 3 Month (n = 26)3.4 units on a scaleStandard Deviation 0.7
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeLifestyle - 6 Month (n = 25)3.4 units on a scaleStandard Deviation 0.7
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeLifestyle - 12 Month (n = 25)3.3 units on a scaleStandard Deviation 0.8
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeLifestyle - 24 Month (n = 23)3.5 units on a scaleStandard Deviation 0.7
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeCoping - Baseline (n = 29)1.9 units on a scaleStandard Deviation 0.5
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeCoping - 3 Month (n = 26)2.9 units on a scaleStandard Deviation 0.8
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeCoping - 6 Month (n = 25)2.8 units on a scaleStandard Deviation 0.8
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeCoping - 12 Month (n = 25)2.8 units on a scaleStandard Deviation 0.9
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeCoping - 24 Month (n = 23)2.8 units on a scaleStandard Deviation 0.9
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeEmbarrassment - Baseline (n = 29)1.8 units on a scaleStandard Deviation 0.6
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeEmbarrassment - 3 Month (n = 26)2.9 units on a scaleStandard Deviation 0.9
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeEmbarrassment - 6 Month (n = 25)2.9 units on a scaleStandard Deviation 1
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeEmbarrassment - 12 Month (n = 25)3.0 units on a scaleStandard Deviation 0.9
TOPASQuality of Life Assessment as Measured by Fecal Incontinence Quality of LifeEmbarrassment - 24 Month (n = 23)2.9 units on a scaleStandard Deviation 1
Other Pre-specified

Anal Manometry: Maximum Resting Pressure

Time frame: Baseline (pre-treatment), 6 Month post-treatment

ArmMeasureGroupValue (MEAN)Dispersion
TOPASAnal Manometry: Maximum Resting PressureBaseline (n = 28)29.2 mmHgStandard Deviation 23.2
TOPASAnal Manometry: Maximum Resting Pressure6 Month (n = 20)37.7 mmHgStandard Deviation 25.8
Other Pre-specified

Anal Manometry: Maximum Squeeze Pressure

Time frame: Baseline (pre-treatment), 6 Month post-treatment

ArmMeasureGroupValue (MEAN)Dispersion
TOPASAnal Manometry: Maximum Squeeze PressureBaseline (n = 28)53.2 mmHgStandard Deviation 38.7
TOPASAnal Manometry: Maximum Squeeze Pressure6 Month (n = 20)51.8 mmHgStandard Deviation 32.9
Other Pre-specified

Anal Manometry: Maximum Tolerable Volume

Time frame: Baseline (pre-treatment), 6 Month post-treatment

ArmMeasureGroupValue (MEAN)Dispersion
TOPASAnal Manometry: Maximum Tolerable VolumeBaseline (n = 26)115.3 ccStandard Deviation 52.4
TOPASAnal Manometry: Maximum Tolerable Volume6 Month (n = 20)126.3 ccStandard Deviation 49.6
Other Pre-specified

Anal Manometry: Rectal First Sensation

Time frame: Baseline (pre-treatment), 6 Month post-treatment

ArmMeasureGroupValue (MEAN)Dispersion
TOPASAnal Manometry: Rectal First SensationBaseline (n = 29)37.6 ccStandard Deviation 22.3
TOPASAnal Manometry: Rectal First Sensation6 Month (n = 23)41.7 ccStandard Deviation 30
Post Hoc

Percentage of Subjects With Greater Than or Equal to a 50 Percent Reduction in FI Episodes From Baseline

Includes solid and liquid stools, as measured by a subject-reported bowel diary

Time frame: 6 Weeks, 3 Month, 6 Month, 12 Month and 24 Month post-treatment

Population: Two subjects were enrolled who recorded no FI episodes at baseline and were excluded from this analysis. Missing data was not imputed and was considered a treatment failure.~The Bowel Diary was completed by the number of subjects at each visit as follows:~6 Week: N=24, 3 Month: N=25, 6 Month: N=22, 12 Month: N=21, 24 Month: N=24

ArmMeasureGroupValue (NUMBER)
TOPASPercentage of Subjects With Greater Than or Equal to a 50 Percent Reduction in FI Episodes From Baseline6 Week (n = 24)59.3 percentage participants
TOPASPercentage of Subjects With Greater Than or Equal to a 50 Percent Reduction in FI Episodes From Baseline3 Month (n = 25)63.0 percentage participants
TOPASPercentage of Subjects With Greater Than or Equal to a 50 Percent Reduction in FI Episodes From Baseline6 Month (n = 22)51.9 percentage participants
TOPASPercentage of Subjects With Greater Than or Equal to a 50 Percent Reduction in FI Episodes From Baseline12 Month (n = 21)40.7 percentage participants
TOPASPercentage of Subjects With Greater Than or Equal to a 50 Percent Reduction in FI Episodes From Baseline24 Month (n = 24)55.6 percentage participants
Other Pre-specified

Pudendal Nerve Terminal Motor Latency

Pudendal Nerve Terminal Motor Latency is a measure of the time it takes for stimulation of the pudendal nerve to elicit contraction of the pelvic floor muscles and anal sphincter. It is a surrogate marker of pudendal nerve injuries and a means of ascertaining whether anal sphincter weakness is attributable to pudendal nerve injury, sphincter defect, or both.

Time frame: Baseline (pre-treatment), 6 Month post-treatment

ArmMeasureGroupValue (MEAN)Dispersion
TOPASPudendal Nerve Terminal Motor LatencyBaseline - Left Pudendal Nerve Latency (n = 17)2.9 msecStandard Deviation 2.4
TOPASPudendal Nerve Terminal Motor LatencyBaseline - Right Pudendal Nerve Latency (n = 16)3.3 msecStandard Deviation 2.6
TOPASPudendal Nerve Terminal Motor Latency6 Month - Right Pudendal Nerve Latency (n = 10)3.8 msecStandard Deviation 2.8
TOPASPudendal Nerve Terminal Motor Latency6 Month - Left Pudendal Nerve Latency (n = 12)3.1 msecStandard Deviation 2.3

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026