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Post Market Clinical Evaluation of Gamma 4

Post Market Clinical Evaluation of Gamma 4: Prospective, Multicenter, Follow-up Study (PEGASUS)

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT05523635
Acronym
PEGASUS
Enrollment
100
Registered
2022-08-31
Start date
2023-03-06
Completion date
2025-10-16
Last updated
2026-04-24

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

Conditions

Femoral Fracture

Keywords

Fractures, Hip Fracture, Leg Injuries, Wounds and Injuries

Brief summary

This is a prospective, multi-center, non-randomized, post-market clinical investigation of the Gamma 4 System. Neither subjects nor investigators are blinded to treatment. It is anticipated that a total of 100 subjects will be enrolled at five sites. Total duration of enrollment, 12 month follow-up and analysis is expected to take approximately 30 months. The clinical investigation has been designed to follow the surgeon's standard of care for subjects treated with a cephalomedullary nail for femoral fractures or and deformities, in addition to a 12 month follow-up visit. The primary endpoint of this clinical investigation is demonstration of bone consolidation by 12 months.

Detailed description

The objective of this clinical investigation is to demonstrate the safety and efficacy/performance of the Gamma 4 System. Enrolled subjects will undergo an initial assessment, with follow-up evaluations at 3 Months, 6 Months, and 12 Months after the index procedure. The primary endpoint of this clinical investigation is demonstration of bone consolidation by 12 months, as measured by the Investigator. Secondary endpoints will include safety through reporting the incidence of device related intra-operative and post-operative adverse events by 12 months, patient reported outcome measures (SF-35v2 and Modified Harris Hip Score), and other specific health outcomes. Efficacy will be assessed through non-inferiority of bone consolidation proportion compared to the pooled literature control, as well as the SF-36 score results by 12 months.

Interventions

DEVICEGamma4 Nailing System

The Gamma4 Nailing System is is indicated for the treatment of stable and unstable fractures as well as for stabilization of bones and correction of bone deformities in the intracapsular, trochanteric, subtrochanteric and shaft regions of the femur (including osteoporotic and osteopenic bone).

Sponsors

Stryker Trauma and Extremities
Lead SponsorINDUSTRY

Study design

Observational model
COHORT
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Subject is a male or non-pregnant female age 18 years or older at the time of surgery; * Subject is willing and able to give written informed consent and comply with the requirements of this Clinical Investigation Plan; and * Subject has or is intended to be treated with the Gamma 4 System in accordance with its legally approved Indication for Use (IFU). Indication For Use in the United States and Canada: The Gamma4 System is indicated for the treatment of stable and unstable fractures as well as for stabilization of bones and correction of bone deformities in the intracapsular, trochanteric, subtrochanteric and shaft regions of the femur (including osteoporotic and osteopenic bone).

Exclusion criteria

* Subject is currently enrolled in or plans to enroll in any concurrent drug and/or device clinical investigation that, in the opinion of the Investigator, may confound results * Subject with

Design outcomes

Primary

MeasureTime frameDescription
Bone Consolidation via Clinical Assessmentby 12 monthsClinical consolidation is defined as no pain or tenderness when weight bearing
Bone Consolidation via Radiographic Assessmentby 12 monthsRadiographic bony consolidation is defined as bridging of the fracture at three of four cortices.

Secondary

MeasureTime frameDescription
Safety will be measured by capturing the incidence rate of device-related adverse events12 monthsIncidence of device related intra-operative and post-operative Adverse Events/incidents by 12 months.
SF-36v2® Physical Component Score and Mental Component Score (PCS & MCS)12 monthsThe SF-36 PCS is a self-report measure of health status. SF-36 Physical Component Summary scores range from 0 to 100; higher SF-36 score results are linked to better subject results. Efficacy/performance at 12 months will be measured by the SF-36 Physical Component Score (PCS) compared to the pooled literature controls.
Modified Harris Hip Score12 monthsThe modified Harris Hip Score is a hip-specific questionnaire which evaluates hip pain and function. It is a commonly used and validated tool. Efficacy/performance at 12 months will be measured by the modified Harris Hip Score compared to the pooled literature controls.

Countries

United States

Contacts

STUDY_DIRECTORRebecca Gibson

Stryker Trauma and Extremities

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Apr 25, 2026