Cognition in Postoperative Total Hip Arthroplasty and Total Hip Resurfacing Patients

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT01079468

Enrollment

100

Registered

2010-03-03

Start date

2010-01-31

Completion date

2011-11-30

Last updated

2011-11-08

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

Conditions

Cognition

Keywords

Transient cognitive decline following orthopaedic surgery

Brief summary

Transient cognitive changes after surgery may be due to many different factors. It is estimated that between 5-29% of patients undergoing orthopedic surgery experience a transient decline in their cognition. Fat and bone marrow debris embolization can cause cognitive changes if they enter the cerebral circulation in significant numbers. During total hip arthroplasty the placement of the femoral stem leads to a rise in intramedullary pressure which can cause fat and bone marrow debris to embolize into the systemic circulation. Total hip resurfacing arthroplasty avoids entrance into the femoral canal. The purpose of this study is to assess transient cognitive changes after total hip arthroplasty and compare them to patients undergoing total hip resurfacing arthroplasty. We hypothesize that patients undergoing total hip resurfacing arthroplasty will experience less transient cognitive changes due to the avoidance of violating the femoral canal during the procedure.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Inclusion criteria

1. Male and non-pregnant, non-lactating, female subjects who are 18 and older 2. Subjects who are able and willing to provide informed consent 3. Subjects deemed able to comply with study schedule visits and procedures 4. Subjects undergoing elective THA procedures 5. Subjects undergoing elective total hip resurfacing arthroplasty 6. Subjects in satisfactory health as determined by the investigator on the basis of medical history and physical examination.

Exclusion criteria

1. Subjects with or with a history of Parkinson's Disease 2. Subjects with a history of depression as reported in their past medical history 3. Subjects with a history of dementia as reported in their past medical history 4. Subjects currently using antidepressants 5. Subjects currently using antipsychotic medications

Design outcomes

Primary

Measure	Time frame
Degree of transient cognitive changes postoperatively as measured by the Folstein mini-mental examination	—

Secondary

Measure	Time frame
Percentage of patient who experience transient cognitive decline following Total Hip Arthroplasty or total hip resurfacing arthroplasty as measured by the Folstein mini-mental examination	—

Countries

United States

Outcome results