Please select the eligibility criteria that correspond to the clinical trial below.
Title: Comparison to Short-duration Tourniquet Total Knee Arthroplasty (TKA) With the Aquamantys® Bipolar Sealer and the Standard of Care in the Setting of Outpatient TKA: A Randomized, Double-blinded Study
Brief Summary: The purpose of this study is to compare quadriceps muscle strength, pain, opioid consumption and patient function during the first three months after short-stay total knee replacement between patients treated with short-duration tourniquet knee replacement with the Aquamantys® bipolar sealer versus those treated with the standard of care (tourniquet used throughout the case and no Aquamantys®).

By doing this study, investigators hope to learn if short duration tourniquet knee replacement with the Aquamantys® bipolar sealer is more effective than standard of care (tourniquet used throughout the case and no Aquamantys®). The purpose of this study is to compare quadriceps muscle strength, pain, opioid consumption and patient function during the first three months after short-stay total knee replacement between patients treated with short-duration tourniquet knee replacement with the Aquamantys® bipolar sealer versus those treated with the standard of care (tourniquet used throughout the case and no Aquamantys®).


Options:
A: Inclusion Criteria:

* Patients with osteoarthritis scheduled for TKA at the department of orthopedic surgery, Hässleholm Hospital, Sweden, are eligible for participation in the study.

Exclusion Criteria:

* body mass index (BMI) \> 35 m/kg2,
* prior major knee surgery to the ipsilateral knee,
* ongoing infection, known immunological deficiency or ASA physical status category \> IV.
B: Inclusion Criteria:

* patients \> 40 \< 80 years planed for a total knee arthroplasty The patient will be given a written informed consent to participate in this clinical investigation.

The patient understand the clinical investigation and will cooperate with the investigational team

Exclusion Criteria:

* Preoperatively \<90 flexion, \> 10 extensionsdeficit. Rheumatoid arthritis, other forms of inflammatory disease or autoimmune disorders Immunosuppresed patient Systemic corticosteroid used in previous 6 month Previous major knee surgery as osteotomy, knee related fractures, BMI\<35 Diabethic neuropathy Preopratively opiod or garbabentine treatment Psychiatric disorders Planed for simultaneous bilateral knee arthroplasty
C: Inclusion Criteria:

* Age = 55-85 years
* Osteoarthritis of knee joint (degree III or IV)
* Physical status (ASA I or II)
* Body mass index \< 45 kg/m²
* Written informed consent

Exclusion Criteria:

* Age \<55 or \> 85years
* Osteoarthritis knee joint (degree I or II)
* Physical status (ASA III or IV)
* Body mass index ≥ 45 kg/m²
* Unable to provide written consent
* Malignant disease
* Rheumatoid disease
* Infectious disease
* Coagulation disorder
* History of deep vein thrombosis or pulmonary embolism
* Peripheral arterial disease
* Immune deficiency
* Medication (Glucocorticoid, Aspirin, Heparin, Cumardine, Wafarin)
* Neurological dysfunction
* Liver insufficiency
* Coronary heart disease
* Immobility
D: Inclusion Criteria:

* primary total knee arthroplasty

Exclusion Criteria:

* repeat knee replacement (revision arthroplasty)
* bilateral knee replacements on the same day
* partial knee replacements
* health or social limitations that do not allow for the participant to be discharged to home on the same day or day after surgery.

Answer: D