Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

Pelvic Alignment Level (PAL) Instrument Evaluation (PAL)

This study has been terminated.
(Lagging enrollment)
Information provided by (Responsible Party):
Stryker Orthopaedics Identifier:
First received: March 8, 2011
Last updated: February 20, 2015
Last verified: February 2015
The study is conducted to evaluate the performance of the Pelvic Alignment Level (PAL) instrument in achieving desired acetabular position, desired leg length and offset after Total Hip Replacement (THR) reconstruction.

Condition Intervention
Arthroplasty, Replacement, Hip
Device: Pelvic Alignment Level (PAL) Instrument
Device: No Pelvic Alignment Level (PAL) Instrument

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Prospective Clinical Evaluation of Acetabular Cup Placement in Total Hip Replacements Utilizing a Pelvic Alignment Level (PAL) Instrument

Resource links provided by NLM:

Further study details as provided by Stryker Orthopaedics:

Primary Outcome Measures:
  • To Evaluate the Surgical Accuracy in Placing Acetabular Components at a Target of 45° Inclination and 20° Anteversion While Using the PAL Compared to Surgeries Without Using the PAL Instrument. [ Time Frame: 6 week follow-up ]

Secondary Outcome Measures:
  • To Evaluate the Surgical Success of Achieving Preoperative Targets for Leg Length and Femoral Offset, or be Able to Document Changes to Pre-operative Leg Length and Offset, Using the PAL Compared to Surgeries Without Using the PAL Instrument. [ Time Frame: 6 week follow-up ]

Enrollment: 7
Study Start Date: February 2011
Study Completion Date: April 2012
Primary Completion Date: April 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Pelvic Alignment Level (PAL)
Pelvic Alignment Level Instrument Used
Device: Pelvic Alignment Level (PAL) Instrument
Pelvic Alignment Level Instrument Used
No Pelvic Alignment Level (PAL)
No Pelvic Alignment Level Instrument Used
Device: No Pelvic Alignment Level (PAL) Instrument
No Pelvic Alignment Level Instrument Used

Detailed Description:
Total hip replacement (THR) has been a sucessful treatment for cases of degenerative joint diseases. However, post operative complications such as dislocations, osteolysis, component wear and migration are still a concern. It has been noted in the scientific literature that precise acetabular cup position helps reduce such post operative complications. The Pelvic Alignment Level (PAL) offers this solution by assessing pelvic motion and optimizing implant position without the need for intra-operative fluoroscopy or a large capital expenditure. The focus of this study is to evaluate the clinical outcomes (acetabular cup placement, femoral offset, and leg length) of using the PAL instrument to those without using PAL instrument during total hip replacement. This will be a prospective, post market, randomized multi-center clinical study.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patient has signed an IRB approved, evaluation specific Informed Patient Consent Form.
  • Patient is a male or non-pregnant female age 18 years or older at time of enrollment.
  • Patient clinically qualifies for total hip arthroplastic surgery, based on physical examination and medical history.
  • Patient must have a diagnosis of: osteoarthritis, traumatic arthritis, avascular necrosis, slipped capital epiphysis, pelvic fracture, failed fracture fixation or rheumatoid arthritis.

Exclusion Criteria:

  • Patient's anatomy precludes a cup placement of 45° inclination and 20° anteversion.
  • Patient has an active infection within the affected hip joint.
  • Patient is a prisoner.
  • Patient has plans to relocate to another geographic area before the completion of the evaluation.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01312428

United States, Kentucky
Healthcare Center for Advanced Medicine
Louisville, Kentucky, United States, 40202
Sponsors and Collaborators
Stryker Orthopaedics
Study Chair: Arthur L. Malkani, MD Healthcare Center for Advanced Medicine
  More Information

Responsible Party: Stryker Orthopaedics Identifier: NCT01312428     History of Changes
Other Study ID Numbers: 64
Study First Received: March 8, 2011
Results First Received: August 15, 2014
Last Updated: February 20, 2015 processed this record on April 28, 2017