Assessing the Comparability of 2D and 4D Ultrasound Measurements

NCT ID: NCT02666911

Last Updated: 2017-08-07

Basic Information

• Recruitment Status: WITHDRAWN
• Clinical Phase: NA
• Study Classification: INTERVENTIONAL
• Study Start Date: 2018-01-31
• Study Completion Date: 2019-01-31

Brief Summary

Investigators will recruit 20 healthy volunteers between the ages of 18 and 80, who have no history of carpal tunnel syndrome or wrist injury. Images will be captured twice, first with the 2D transducer and then with the 4D transducer and compared to images captured with the new 4D transducer, using the same movement data analysis protocols. Investigators will also assess the inter and intrarater reliability of the 4D transducer images, by using two different sonographers, both trained in the technique, measuring the same blinded images on separate occasions, at least two weeks apart. The overall goal of this project is to assess the reliability, or reproducibility, of measurements in normal subjects using a novel 4D ultrasonographic method to characterize the subsynovial connective tissue (SSCT) and detect motion between SSCT, median nerve and tendon motion for the evaluation and diagnosis of patients with disorders affecting the carpal tunnel, especially carpal tunnel syndrome (CTS).

Detailed Description

CTS can be diagnosed in many ways, but there are currently no non-invasive methods to assess the physiology within the carpal tunnel, which may help select treatment and predict treatment outcomes. The investigators have shown in preliminary work that differences in the motion of various structures within the carpal tunnel, including the median nerve, flexor tendons, and SSCT, vary in normal subjects and those with CTS. A clinical trial is already under way to assess conventional ultrasound imaging to predict outcomes of CTS treatments. In this study investigators wish to compare the current ultrasound methods, which involve moving two dimensional images, with a new technology which captures moving images in three dimensions (i.e., four dimensions, or 4D). If successful, a single 4D measurement could replace longitudinal and transverse 2D images, saving time and allowing better understanding of the relationship between displacements in both planes.

Conditions

Carpal Tunnel

Study Design

• Allocation Method: NON_RANDOMIZED
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: HEALTH_SERVICES_RESEARCH
• Blinding Strategy: NONE

Study Groups

4D Ultrasound

4D ultrasound imaging of the carpal tunnel. 20 healthy volunteers between the ages of 18 and 80, who have no history of carpal tunnel syndrome or wrist injury. The same patients will be imaged with both 2D and 4D transducers.

Group Type: EXPERIMENTAL

4D Ultrasound

Intervention Type: PROCEDURE

Each subject will be imaged lying supine on imaging table with affected arm outstretched on Plexiglass board. An ultrasound scanner equipped with 15L8 linear array transducer will be set to depth of 20-25 mm with a 15MHz image acquisition frequency (for longitudinal and transverse imaging) and the same ultrasound machine equipped with 4D transducer will be used. Ultrasound evaluation will be performed by a sonographer trained in the pertinent image acquisition procedures. The image acquisition frame rate will be maintained at 70Hz, and the image compression will be set to low.

2D ultrasound

2D ultrasound imaging of the carpal tunnel. 20 healthy volunteers between the ages of 18 and 80, who have no history of carpal tunnel syndrome or wrist injury.The same patients will be imaged with both 2D and 4D transducers.

Group Type: ACTIVE_COMPARATOR

2D ultrasound

Intervention Type: PROCEDURE

Each subject will be imaged lying supine on imaging table with affected arm outstretched on Plexiglass board. An ultrasound scanner equipped with 15L8 linear array transducer will be set to depth of 20-25 mm with a 15MHz image acquisition frequency (for longitudinal and transverse imaging) and the same ultrasound machine equipped with 4D transducer will be used. Ultrasound evaluation will be performed by a sonographer trained in the pertinent image acquisition procedures. The image acquisition frame rate will be maintained at 70Hz, and the image compression will be set to low.

Interventions

4D Ultrasound

Each subject will be imaged lying supine on imaging table with affected arm outstretched on Plexiglass board. An ultrasound scanner equipped with 15L8 linear array transducer will be set to depth of 20-25 mm with a 15MHz image acquisition frequency (for longitudinal and transverse imaging) and the same ultrasound machine equipped with 4D transducer will be used. Ultrasound evaluation will be performed by a sonographer trained in the pertinent image acquisition procedures. The image acquisition frame rate will be maintained at 70Hz, and the image compression will be set to low.

Intervention Type: PROCEDURE

2D ultrasound

Each subject will be imaged lying supine on imaging table with affected arm outstretched on Plexiglass board. An ultrasound scanner equipped with 15L8 linear array transducer will be set to depth of 20-25 mm with a 15MHz image acquisition frequency (for longitudinal and transverse imaging) and the same ultrasound machine equipped with 4D transducer will be used. Ultrasound evaluation will be performed by a sonographer trained in the pertinent image acquisition procedures. The image acquisition frame rate will be maintained at 70Hz, and the image compression will be set to low.

Intervention Type: PROCEDURE

Eligibility Criteria

Inclusion Criteria

• Healthy Volunteers

Exclusion Criteria

• Cervical radiculopathy
• Rheumatoid arthritis
• Osteoarthritis
• Flexor tendinitis
• Gout
• Hemodialysis
• Sarcoidosis
• Peripheral nerve disease
• Amyloidosis
• Traumatic injury - same arm

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 80 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Mayo Clinic

OTHER

Sponsor Role: lead

Responsible Party

Peter C. Amadio, M.D.

Consultant - Hand Surgery

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Peter C. Amadio, M.D.

Role: PRINCIPAL_INVESTIGATOR

Mayo Clinic

Other Identifiers

15-008487

Identifier Type: -

Identifier Source: org_study_id