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NaviFast 6D for Limb Length Measurement During Total Hip Arthroplasty (NaviFast6D)

2026년 5월 14일 업데이트: Lodz University of Technology

Orthopedic Miniature Measuring Arm for Assessing Selected Parameters During Total Hip Arthroplasty

This multicenter clinical investigation evaluated the NaviFast 6D orthopedic miniature measuring arm during total hip arthroplasty. NaviFast 6D is an intraoperative measuring device intended to help orthopedic surgeons assess changes in lower limb length and hip offset during surgery.

The study was conducted in adult patients undergoing primary total hip arthroplasty. It included two phases. In the first phase, the device was used to verify functionality, usability, and measurement accuracy without influencing surgical decisions. In the second phase, surgeons could use the intraoperative measurements provided by NaviFast 6D when selecting trial and final implant components.

The main objectives were to compare NaviFast 6D measurements with radiographic measurements of limb length change and to compare postoperative leg length discrepancy between patients treated with NaviFast 6D and a control group treated using conventional clinical assessment. The study also assessed the impact of device use on surgical time and recorded device-related and procedure-related safety events.

연구 개요

상태

완전한

정황

개입 / 치료

상세 설명

This was a multicenter, controlled, open-label, non-randomized clinical investigation of the NaviFast 6D orthopedic miniature measuring arm in patients undergoing primary total hip arthroplasty.

NaviFast 6D is an active, invasive surgical medical device with a measuring function. The device consists of pelvic and femoral fixation elements, an articulated measuring arm with motion sensors, and a microprocessor unit with a display. It is intended for professional use by orthopedic surgeons during total hip arthroplasty to provide intraoperative information on changes in lower limb length and hip offset relative to the pre-implantation state.

During the procedure, fixation elements were attached to the pelvis and femur using cannulated screws. The measuring arm connected the two fixation elements and recorded relative displacement in six degrees of freedom. A baseline measurement was taken before implantation. After preparation of the acetabulum and femur and placement of trial components, the measuring arm was used again to assess the change in limb length and offset. The surgeon could then consider these measurements before final implantation.

The clinical investigation was conducted in two phases. Phase I focused on verification of device functionality, safety, usability, optimization of the measurement procedure, and comparison of NaviFast 6D measurements with reference radiographic measurements. During Phase I, surgical decisions were based on standard clinical assessment rather than on the device measurements. Phase II evaluated use of the final device configuration in clinical practice, with surgeons allowed to use NaviFast 6D measurements when selecting implant components, unless clinical assessment contradicted the measurement.

The primary objective of Phase I was to determine the accuracy of NaviFast 6D measurements of limb length change and hip offset compared with radiographic reference measurements. The primary objective of Phase II was to compare postoperative leg length discrepancy in patients treated with NaviFast 6D with a control group treated using conventional clinical assessment only.

Secondary objectives included assessment of the accuracy of the radiographic reference measurement method using the LLDcalc.com software, estimation of the additional operative time associated with use of NaviFast 6D, and identification and classification of adverse events or device deficiencies associated with use of the measuring arm.

The study population consisted of adult patients undergoing primary total hip arthroplasty. Patients were enrolled at participating clinical centers in Poland. The overall study period covered recruitment, surgical procedures, and postoperative observation from May 9, 2023 to August 30, 2024.

연구 유형

중재적

등록 (실제)

84

단계

  • 해당 없음

연락처 및 위치

이 섹션에서는 연구를 수행하는 사람들의 연락처 정보와 이 연구가 수행되는 장소에 대한 정보를 제공합니다.

연구 장소

  • 폴란드
      • Zakopane, 폴란드
        • University Orthopaedic and Rehabilitation Hospital
    • Greater Poland Voivodeship
      • Kalisz, Greater Poland Voivodeship, 폴란드
        • Wojewódzki Szpital Zespolony im. L. Perzyny
    • Lublin Voivodeship
      • Lublin, Lublin Voivodeship, 폴란드
        • Military Clinical Hospital in Lublin
    • Łódź Voivodeship
      • Pabianice, Łódź Voivodeship, 폴란드
        • Pabianice Medical Center

참여기준

연구원은 적격성 기준이라는 특정 설명에 맞는 사람을 찾습니다. 이러한 기준의 몇 가지 예는 개인의 일반적인 건강 상태 또는 이전 치료입니다.

자격 기준

공부할 수 있는 나이

  • 성인
  • 고령자

건강한 자원 봉사자를 받아들입니다

아니

설명

Inclusion Criteria:

  • Patients scheduled for primary total hip arthroplasty.
  • Male or female patients.
  • Age 20 to 85 years.
  • No previous surgical procedures in the affected hip joint.
  • Ability and willingness to provide informed consent for participation in the clinical investigation.

Exclusion Criteria:

  • Lack of informed consent to participate in the clinical investigation.
  • Pregnancy.
  • Femoral neck fracture.
  • Pertrochanteric femoral fracture.
  • Pseudarthrosis of the femoral neck.
  • Traumatic or post-traumatic changes of the proximal femur or acetabular region.
  • Bone neoplasm.
  • Bone infection.
  • Advanced osteoporosis.

공부 계획

이 섹션에서는 연구 설계 방법과 연구가 측정하는 내용을 포함하여 연구 계획에 대한 세부 정보를 제공합니다.

연구는 어떻게 설계됩니까?

디자인 세부사항

  • 주 목적: 다른
  • 할당: 무작위화되지 않음
  • 중재 모델: 병렬 할당
  • 마스킹: 없음(오픈 라벨)

무기와 개입

참가자 그룹 / 팔
개입 / 치료
실험적: NaviFast 6D Measuring Arm
Patients undergoing primary total hip arthroplasty with intraoperative use of the NaviFast 6D orthopedic miniature measuring arm. The device was used to measure changes in lower limb length and hip offset during surgery. In Phase I, measurements were recorded but did not guide surgical decisions. In Phase II, surgeons could use NaviFast 6D measurements when selecting trial and final implant components.
장치: NaviFast 6D Measuring Arm
NaviFast 6D is an orthopedic miniature measuring arm used intraoperatively during total hip arthroplasty to measure changes in lower limb length and hip offset relative to the pre-implantation state. The device includes pelvic and femoral fixation elements, an articulated measuring arm with motion sensors, and a microprocessor unit with a display.
활성 비교기: Conventional Clinical Assessment
Patients undergoing primary total hip arthroplasty using conventional intraoperative clinical assessment only, without use of the NaviFast 6D measuring arm. This group served as the control group for comparison of postoperative leg length discrepancy.
절차: Conventional Clinical Assessment During Total Hip Arthroplasty
Standard intraoperative clinical assessment used during primary total hip arthroplasty without use of the NaviFast 6D measuring arm. Assessment of limb length and hip biomechanics was based on the surgeon's conventional visual, palpatory, and clinical judgment during the procedure.

연구는 무엇을 측정합니까?

주요 결과 측정

결과 측정
측정값 설명
기간
Accuracy of NaviFast 6D Measurement of Lower Limb Length Change
기간: Preoperative pelvic radiograph, an average of 1 day before surgery; intraoperative NaviFast 6D measurement during surgery; and postoperative pelvic radiograph, an average of 1 day after surgery
Accuracy of intraoperative lower limb length change measurement performed with the NaviFast 6D measuring arm, assessed by comparing NaviFast 6D measurements with reference radiographic measurements obtained from preoperative and postoperative pelvic radiographs analyzed using LLDcalc.com software. The endpoint was expressed as the root mean square difference between NaviFast 6D and radiographic measurements in millimeters.
Preoperative pelvic radiograph, an average of 1 day before surgery; intraoperative NaviFast 6D measurement during surgery; and postoperative pelvic radiograph, an average of 1 day after surgery
Postoperative Leg Length Discrepancy Compared With Control Group
기간: At postoperative pelvic radiographic assessment, an average of 1 day after surgery
Postoperative leg length discrepancy was compared between patients undergoing total hip arthroplasty with intraoperative use of NaviFast 6D and patients undergoing total hip arthroplasty using conventional intraoperative clinical assessment only. Leg length discrepancy was assessed on postoperative radiographs and expressed in millimeters.
At postoperative pelvic radiographic assessment, an average of 1 day after surgery

2차 결과 측정

결과 측정
측정값 설명
기간
Accuracy of Radiographic Reference Measurement Using LLDcalc.com
기간: At radiographic image analysis of paired preoperative or paired postoperative pelvic radiographs obtained in the same clinical state within approximately 1 to 3 months
Accuracy of the radiographic reference method for assessing leg length discrepancy and hip offset was evaluated using LLDcalc.com software. The analysis assessed the repeatability of measurements performed on radiographs obtained in the same clinical state and expressed results as root mean square differences in millimeters.
At radiographic image analysis of paired preoperative or paired postoperative pelvic radiographs obtained in the same clinical state within approximately 1 to 3 months
Additional Operative Time Associated With NaviFast 6D Use
기간: During the surgical procedure
Additional operative time associated with use of the NaviFast 6D measuring arm was estimated based on the time required for device fixation, intraoperative measurement procedures, and potential implant component adjustment based on device readings.
During the surgical procedure
Adverse Events and Device Deficiencies Associated With NaviFast 6D
기간: From the start of the surgical procedure through postoperative Day 2
Adverse events, serious adverse events, device deficiencies, and corrective actions associated with intraoperative use of the NaviFast 6D measuring arm were recorded and classified throughout the clinical investigation.
From the start of the surgical procedure through postoperative Day 2

공동 작업자 및 조사자

여기에서 이 연구와 관련된 사람과 조직을 찾을 수 있습니다.

스폰서

Lodz University of Technology

수사관

  • 수석 연구원: Ireneusz Urbaniak, MD, PhD, Wojewódzki Szpital Zespolony im. L. Perzyny

연구 기록 날짜

이 날짜는 ClinicalTrials.gov에 대한 연구 기록 및 요약 결과 제출의 진행 상황을 추적합니다. 연구 기록 및 보고된 결과는 공개 웹사이트에 게시되기 전에 특정 품질 관리 기준을 충족하는지 확인하기 위해 국립 의학 도서관(NLM)에서 검토합니다.

연구 주요 날짜

연구 시작 (실제)

2023년 5월 9일

기본 완료 (실제)

2024년 8월 30일

연구 완료 (실제)

2024년 8월 30일

연구 등록 날짜

최초 제출

2026년 5월 5일

QC 기준을 충족하는 최초 제출

2026년 5월 14일

처음 게시됨 (실제)

2026년 5월 19일

연구 기록 업데이트

마지막 업데이트 게시됨 (실제)

2026년 5월 19일

QC 기준을 충족하는 마지막 업데이트 제출

2026년 5월 14일

마지막으로 확인됨

2026년 5월 1일

추가 정보

이 연구와 관련된 용어

키워드

추가 관련 MeSH 약관

기타 연구 ID 번호

  • PBK 1.3
  • POIR.01.01.01-00-0290/21 (기타 보조금/기금 번호: National Centre for Research and Development)

개별 참가자 데이터(IPD) 계획

개별 참가자 데이터(IPD)를 공유할 계획입니까?

아니요

IPD 계획 설명

Individual participant data will not be shared because the dataset contains sensitive clinical and radiographic information, and no formal individual participant data sharing plan or participant consent for such sharing was defined in the study protocol. Aggregate results will be reported in publications.

약물 및 장치 정보, 연구 문서

미국 FDA 규제 의약품 연구

아니

미국 FDA 규제 기기 제품 연구

아니

이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .

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