Evaluation of Ultrasonic Neuroma Size With Residual Limb Pain in Above-Knee Amputees

NCT00686764 | Completed

• 1 other identifier: OHSUIRB#3862
• Study Type: observational
• Target: 7
• Locations: 1 country
• Sites: 1

Brief Summary

Background: The formation of neuromas, a fusiform swelling of a nerve or nerve ending, is a well documented response to limb amputation. Likewise, Residual Limb Pain (RLP), pain felt from the remaining portion of the amputated limb, is common among amputees. Neuromas are found in more than 90% of lower extremity amputations, of which 30-50% are pain-generating for the patient . And while surgical techniques reveal the commonly held belief that neuroma formation is one of the causal drivers behind RLP, there has been no study to demonstrate that the two events - namely the magnitude of neuroma formation and the magnitude of pain experienced by amputees - are correlated. If this correlation, or lack thereof, were elucidated with the use of ultrasonography, this would provide the preliminary data which could lead to further studies in neuroma minimization and/or proliferation. Objective: This study seeks to use ultrasonography (US) to quantify the degree to which neuroma size and the nature of surrounding tissue correlate with the experience of RLP in trans-femoral amputees. Setting and Subjects: This study will enroll 30 trans-femoral amputees, male and female, who are over the age of 18. The study will take place in the OHSU Orthopaedic Outpatient Clinic, and OHSU Imaging Department. Intervention: None. This is an observational clinical study in which we will characterize the sciatic nerve/neuroma and surrounding tissue using ultrasound. Measurements: We will use US to measure the cross sectional area of the neuroma at its widest point and compare this to the cross section of the same neuron at the lesser trochanter. Furthermore, we will describe the morphology of the neuroma. To quantify the subject's pain experience we will utilize the Questionnaire for Persons with Transfemoral Amputation (Q-TFA), Trinity Amputation \& Prosthetic Experience Scale (TAPES), Visual Analog Scale (VAS), and the Short Form 36 (SF-36). Analysis: The statistical analysis will employ a Pearson correlation coefficient and linear regression analysis.

Conditions

Neuroma Amputation

Keywords

trans-femoral amputation

Outcome Measures

Primary Outcomes (2)

• Ultrasonic neuroma size

  Single observation at time of consent

• Residual limb pain

  Single observation at time of consent

Study Arms (1)

Group 1

Trans-femoral amputees that meet the eligibility criteria.

Other: Observational

Interventions

Observational OTHER

Using ultrasound, we will measure the cross-sectional area of the neuroma at its widest point and compare to the cross-sectional area of the same nerve at the lesser trochanter. We will be using four different metrics for quantifying the pain experience of each subject: Questionnaire for Persons with Transfemoral Amputation (Q-FTA), Trinity Amputation and Prosthesis Experience Scales (TAPES), Visual Analog Scale (VAS), and the Short-Form 36 (SF-36).

Group 1

Eligibility Criteria

• Age: 18 Years - 99 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

This study will consist of 25 trans-femoral amputees meeting the inclusion and exclusion criteria. We will recruit participants from the OHSU clinics, Primary Care Clinics, and specialty clinics including orthopaedic surgery, general surgery, pain centers, neurology, and orthotics and prosthesis clinics and offices. We anticipate that the majority of subjects will be recruited from the Department of Orthopaedics and Rehabilitation's clinical practice. Potential subjects will be identified from the investigators' clinic and medical records. Recruiting outside of the Department of Orthopaedics and Rehabilitation will be done using recruiting posters and letters addressed to the primary care physicians, specialists and at prosthetic clinics. Recruitment notices will be posted on the OHSU and Department of Orthopaedics and Rehabilitation's Web sites and the OHSU Study Participation Web site. We intend to enroll 30 subjects.

You may qualify if:

• greater than 18 years old
• a trans-femoral amputee
• more than one year post-amputation
• has worn a prosthesis within the last year

You may not qualify if:

• subject also diagnosed with diabetes
• subject also diagnosed with Peripheral Vascular Disease
• subject also diagnosed with peripheral neuropathy
• subject with spinal cord, head, or nerve root injury

Sponsors & Collaborators

• Oregon Health and Science University: lead

Study Sites (1)

Oregon Health & Science University Center for Health & Healing

Portland, Oregon, 97239, United States

Location

MeSH Terms

Interventions

Watchful Waiting

Intervention Hierarchy (Ancestors)

Outcome Assessment, Health Care; Outcome and Process Assessment, Health Care; Quality of Health Care; Health Services Administration

Study Officials

• Hans Carlson, M.D.

  Oregon Health and Science University

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: CASE ONLY
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Associate professor of physical medicine and rehabilitation in the Department of Orthopaedics and Rehabilitation

Study Record Dates

• First Submitted: May 27, 2008
• First Posted: May 30, 2008
• Study Start: May 1, 2008
• Primary Completion: February 1, 2010
• Study Completion: February 1, 2010
• Last Updated: December 14, 2015

Record last verified: 2015-12

Locations

US (1)