Radiological Riskfactors for Dislocation of Hip Hemiarthroplasty

Radiological Riskfactors for Dislocation of Hip Hemiarthroplasty Through a Posterolateral Approach as Treatment for Femoral Neck Fracture

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT02131987

Acronym

RRDHHR

Enrollment

324

Registered

2014-05-06

Start date

2006-01-31

Completion date

2013-12-31

Last updated

2015-10-29

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

Conditions

Dislocation, Femoral Neck Fracture

Keywords

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

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.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

RETROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

60 Years to No maximum

Healthy volunteers

Inclusion criteria

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

Exclusion criteria

* Direct lateral approach

Design outcomes

Primary

Measure	Time frame	Description
Femoral offset	6 months up to 7 years	The femoral offset is measured on the postoperative X-ray. The result are compared between the groups of dislocated and non-dislocated patients.
Leg length difference	6 months to 7 years	Leg length difference is measured on the postoperative X-ray. The result are compared between the groups of dislocated and non-dislocated patients.
Wiberg angle	6 months to 7 years	Wiberg angle is measured on the postoperative X-ray. The result are compared between the groups of dislocated and non-dislocated patients.

Secondary

Measure	Time frame
1 year mortality	one year

Countries

Sweden

Outcome results