The purpose of the study is to compare the effect of whey protein and collagen on fat free mass, muscle strength, functional ability, wound healing and life quality in elderly patients undergoing elective knee- or hip surgery (defined as elective knee- or hip arthroplasty). The patients are admitted at the department of Orthopaedic Surgery at Herlev Gentofte Hospital.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
SINGLE
Enrollment
15
Participants of each arm will consume 30 g daily of the assigned protein supplementation for 30 days. The protein supplementation will be given as protein powder which the participants will have to dissolve in cold drinks. During the intervention fat free mass, muscle strength, functional ability, wound healing and life quality of the participants will be monitored.
Herlev/Gentofte Hospital
Gentofte Municipality, Hellerup, Denmark
The difference in fat free mass
The outcome will be monitored through BIA and the development of fat free mass in the operated leg will be compared to the development of fat free mass in the non-operated leg.
Time frame: Weekly for 30 days
Wound healing
The amount of days until the wound is healed (defined as: the epithelium is covered without crust). This will be monitored trough pictures and assessed on a scale from 1-5 by a masked doctor.
Time frame: Weekly for 30 days
Redness and infection
The redness and infection around the wound assessed on a scale from 1-5 by a masked doctor through pictures.
Time frame: Weekly for 30 days
Handgrip strength
Handgrip strength measured by a handdynanometer (SAEHAN) in kg and percentage
Time frame: Weekly for 30 days
Extension strength of quadriceps femoris
Measured in amounts of repetitions of 0.5 or 1.0 kg.
Time frame: Weekly for 30 days
Life quality
Measured trough EuroQol-5D-5L
Time frame: Weekly for 30 days
Difference in functional ability (NMS)
Assessed by New mobility score
Time frame: Weekly 30 days
Difference in Chair stand test
Measured by amount of repetitions
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Time frame: Weekly for 30 days