Clinical Trials Logo

Clinical Trial Summary

The goal of this observational study is to determine changes in immune functioning after total knee replacement surgery in elderly. The study population consists of 14 patients aged 65 years or over undergoing primary total knee replacement surgery. Immune functioning will be assessed at multiple timepoints before and after surgery (i.e., ± 6 weeks before, and 1 day, 1 week, ± 2 weeks, and ± 6 weeks after surgery). Each patient will serve as his/her own control. Immune functioning will primarily be assessed by determining the change from baseline in monocyte-derived TNFα production at 1 week after surgery. Changes in monocyte responsiveness are considered indicative for changes in immune functioning. As secondary objective, additional parameters of immune functioning will be assessed. In addition, the course of immune functioning following total knee replacement surgery will be investigated. Burden and potential risks for the patient are estimated to be minor. During the study, 5 blood samples of 20 mL will be collected over a period of ± 12 weeks, resulting in a total blood draw of 100 mL. During surgery a sample of synovial fluid (± 2 mL) will be taken from surgical waste. Before and after surgery patients will report their pain medication intake and the presence of cold and flu-like symptoms in a diary. Patients do not directly benefit from the study.


Clinical Trial Description

The world population is progressively aging. As humans age, their immune system becomes weaker through a process called immunosenescence. This age-related decline in immune functioning results in an increased susceptibility to infections. Elderly with chronic diseases or elderly who have experienced an incident, such as fall-related trauma or surgery, are particularly vulnerable to these infections, likely due to immunosuppression resulting from such an immune challenge. Currently, there are no standard interventions used to improve immune functioning in these immune-suppressed elderly. However, before the potential of such interventions can be explored, postoperative immune suppression in elderly first needs to be demonstrated. The goal of this prospective ex vivo study is therefore to determine changes in immune functioning after total knee replacement surgery in elderly. The study population consists of 14 patients (classified as ASA II or ASA III) aged 65 years or over, diagnosed with osteoarthritis, undergoing primary total knee replacement surgery under general anesthesia. Immune functioning will be assessed at multiple timepoints before and after surgery (i.e., ± 6 weeks before, and 1 day, 1 week, ± 2 weeks, and ± 6 weeks after surgery). Each patient will serve as his/her own control. Immune functioning will primarily be assessed by determining the change from baseline in monocyte-derived TNFα production at 1 week after surgery. TNFα production will be measured after ex vivo stimulation of whole blood with inflammatory stimuli and normalized for monocyte count. Changes in monocyte responsiveness are considered indicative for changes in immune functioning. As secondary objective, additional parameters of immune functioning will be assessed. In addition, the course of immune functioning following total knee replacement surgery will be investigated. Burden and potential risks for the patient are estimated to be minor. During the study, 5 blood samples of 20 mL will be collected over a period of ± 12 weeks, resulting in a total blood draw of 100 mL. Blood sampling will be combined with regular care visits, with the exception of one occasion where blood sampling will be performed at home. Patients could experience mild pain by the venipuncture, which occasionally leads to lightheadedness, fainting and hematoma. During surgery a sample of synovial fluid (± 2 mL) will be taken from surgical waste. Before and after surgery patients will report their pain medication intake and the presence of cold and flu-like symptoms in a diary. Patients do not directly benefit from the study. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05920148
Study type Observational
Source Wageningen University
Contact Klaske van Norren, PhD
Phone +31 (0)317 48 50 93
Email klaske.vannorren@wur.nl
Status Recruiting
Phase
Start date March 12, 2024
Completion date June 2025

See also
  Status Clinical Trial Phase
Completed NCT05433233 - Effects of Lifestyle Walking on Blood Pressure in Older Adults With Hypertension N/A
Recruiting NCT06032065 - Sequential Multiple Assessment Randomized Trial of Exercise for PAD: SMART Exercise for PAD (SMART PAD) Phase 3
Completed NCT05293730 - Trial of the Impact of the Electronic Frailty Integrated With Social Needs N/A
Recruiting NCT03932162 - Gene Expression Changes In Young and Geriatric Skin Early Phase 1
Completed NCT04064528 - Effects of Age on Amino Acid Delivery to Tendon N/A
Completed NCT03366129 - Blood-Brain Barrier Disruption in People With White Matter Hyperintensities Who Have Had a Stroke
Completed NCT06029920 - Influence of Overground Walking on Biomarkers, Cognitive Function, and Quality of Life in Elderly With Mild Cognitive Impairment N/A
Recruiting NCT05543980 - Leg Heat Therapy in Elderly Individuals Phase 2
Recruiting NCT05566938 - Study to Design a Precision Nutrition Strategy at a Group Level in the Elderly N/A
Completed NCT04894929 - Comprehensive Geriatric Assessment in the Monitoring of Functional Improvement N/A
Not yet recruiting NCT06071130 - Emotion, Aging, and Decision Making N/A
Enrolling by invitation NCT04641663 - Multi-target Dietary Supplement Tolerability in an Aging Population (MTDSST) N/A
Completed NCT04088006 - The Evaluation of Efficacy and Safety of Hyaluronic Acid Injection on Skin Moisturization and Elasticity N/A
Completed NCT03695081 - Patient Pathway Pharmacist - Optimal Drug-related Care N/A
Recruiting NCT05424263 - Acetate and Age-associated Arterial Dysfunction Phase 2
Completed NCT05601713 - Mitigating Heat-induced Physiological Strain and Discomfort in Older Adults Via Lower Limb Immersion and Neck Cooling N/A
Completed NCT04551339 - Zinc Versus Multivitamin Micronutrient Supplementation in the Setting of COVID-19 N/A
Recruiting NCT04997577 - Speech Perception and High Cognitive Demand N/A
Completed NCT05922475 - Efficacy of Pre-sleep or Post-exercise Protein During 12 Weeks of Resistance Exercise Training N/A
Completed NCT04015479 - Peanut Protein Supplementation to Augment Muscle Growth and Improve Markers of Muscle Quality and Health in Older Adults N/A