Radiological Riskfactors for Dislocation of Hip Hemiarthroplasty

NCT02131987 | Completed

• 2 other identifiers: SMASNSM
• Study Type: observational
• Target: 324
• Locations: 1 country
• Sites: 1

Brief Summary

Between January 1 2006 and December 31 2013, at our department 324 patients underwent hemiarthroplasty (HA) for displaced femoral-neck fracture with a bipolar prosthesis (Variokopf, Link®, Germany) by the use of the posteriolateral approach. Patients with pathological fractures and HA performed with direct lateral approach were excluded. A retrospective cohort study were conducted. Patients with prosthetic dislocation formed one group and patients without dislocation formed the control group. As standard, post surgery radiographs (anteroposterior and lateral) were taken. After these were performed patient started weight bearing as soon as possible. Clinical data regarding patient demographics, details of the surgical procedure and the medical comorbidities were collected by the use of patient and operative records. Radiological analysis with position evaluation was performed using the post surgery radiographs by measuring Wiberg angle, inequality of leg length and femoral offset of the prostheses and compared with non-operated hip joint using the post surgery x-ray images. Our hypothesis were that patients with single- or recurrent dislocations had shortened postoperative leg length, decreased femoral offsed and a Wiberg angle less than 25 degrees.

Conditions

Dislocation; Femoral Neck Fracture

Keywords

Dislocation; Hemiarthroplasty; Femoral neck fracture; Femoral offset; Leg length difference; Wiberg angle

Outcome Measures

Primary Outcomes (3)

• Femoral offset

  The femoral offset is measured on the postoperative X-ray. The result are compared between the groups of dislocated and non-dislocated patients.

  6 months up to 7 years

• Leg length difference

  Leg length difference is measured on the postoperative X-ray. The result are compared between the groups of dislocated and non-dislocated patients.

  6 months to 7 years

• Wiberg angle

  Wiberg angle is measured on the postoperative X-ray. The result are compared between the groups of dislocated and non-dislocated patients.

  6 months to 7 years

Secondary Outcomes (1)

• 1 year mortality

  one year

Study Arms (2)

Dislocation

Patients operated with hip hemiarthroplasty for a femoral neck fracture with a postoperative dislocation of the prosthesis

Non-dislocated

Patents without dislocation of a hemiarthroplasty for a femoral neck fracture

Eligibility Criteria

• Age: 60 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Between January 1 2006 and December 31 2013, at our department 324 patients underwent hemiarthroplasty (HA) for displaced femoral-neck fracture with a bipolar prosthesis (Variokopf, Link®, Germany) by the use of the posteriolateral approach. Patients with pathological fractures and HA performed with anterolateral approach were excluded.

You may qualify if:

• Femoral neck fracture
• Treated with Hemiarthroplasty
• Through a posterolateral approach

You may not qualify if:

• Direct lateral approach

Sponsors & Collaborators

• Sundsvall Hospital: lead

Study Sites (1)

Orthopaedic department, Sundsvall hospital

Sundsvall, Västernorrland County, 851 86, Sweden

Location

Related Publications (4)

• Madanat R, Makinen TJ, Ovaska MT, Soiva M, Vahlberg T, Haapala J. Dislocation of hip hemiarthroplasty following posterolateral surgical approach: a nested case-control study. Int Orthop. 2012 May;36(5):935-40. doi: 10.1007/s00264-011-1353-0. Epub 2011 Sep 20.

  PMID: 21931967 BACKGROUND

• Ninh CC, Sethi A, Hatahet M, Les C, Morandi M, Vaidya R. Hip dislocation after modular unipolar hemiarthroplasty. J Arthroplasty. 2009 Aug;24(5):768-74. doi: 10.1016/j.arth.2008.02.019. Epub 2008 Jun 13.

  PMID: 18555648 BACKGROUND

• Enocson A, Pettersson H, Ponzer S, Tornkvist H, Dalen N, Tidermark J. Quality of life after dislocation of hip arthroplasty: a prospective cohort study on 319 patients with femoral neck fractures with a one-year follow-up. Qual Life Res. 2009 Nov;18(9):1177-84. doi: 10.1007/s11136-009-9531-x. Epub 2009 Aug 28.

  PMID: 19714486 BACKGROUND

• Mukka S, Lindqvist J, Peyda S, Broden C, Mahmood S, Hassany H, Sayed-Noor A. Dislocation of bipolar hip hemiarthroplasty through a postero-lateral approach for femoral neck fractures: A cohort study. Int Orthop. 2015 Jul;39(7):1277-82. doi: 10.1007/s00264-014-2642-1. Epub 2015 Jan 6.

  PMID: 25557759 RESULT

MeSH Terms

Conditions

Joint Dislocations; Femoral Neck Fractures

Condition Hierarchy (Ancestors)

Joint Diseases; Musculoskeletal Diseases; Wounds and Injuries; Hip Fractures; Femoral Fractures; Fractures, Bone; Hip Injuries; Leg Injuries

Study Officials

• Arkan S Sayed-Noor, MD,PhD,FRCS

  Orthopaedic department, Sundsvalls sjukhus, Landstinget Västernorrland

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: April 28, 2014
• First Posted: May 6, 2014
• Study Start: January 1, 2006
• Primary Completion: December 1, 2013
• Study Completion: December 1, 2013
• Last Updated: October 29, 2015

Record last verified: 2015-10

Locations

SE (1)