Hospital Stay After Knee Replacement

Hospital stay after knee replacement is used to confirm safe recovery from anaesthesia, acceptable pain and nausea control, satisfactory wound and circulation, safe walking and a clear home plan. Discharge is based on readiness rather than a fixed number of nights.

Selected patients may go home on the day of surgery, while many uncomplicated primary knee-replacement patients stay one to three days. Bilateral replacement, revision surgery, complex reconstruction, medical instability, poor balance or inadequate support can require a longer admission. A shorter stay is not automatically better.

For the preceding steps, read Preparing for Knee Replacement Surgery and Knee Replacement Surgery Day.

Quick Answer: How Long Is the Hospital Stay?

Many patients leave within one to three days. Same-day discharge can be suitable when the patient is medically stable, alert, comfortable on oral medicines, eating and drinking, walking and transferring safely, supported at home and able to contact the treating team. The correct timing remains individual.

Same-Day Discharge, Overnight Stay and Longer Admission

Same-day discharge is a selected pathway, not a reduced operation. An overnight or short inpatient stay allows additional pain adjustment, medical observation, walking practice and caregiver education. A longer stay or temporary rehabilitation setting may be required after bilateral or revision surgery, complications, severe weakness, unsafe stairs, cognitive difficulty or lack of home support.

Recovery Room and Ward Monitoring

The recovery team monitors breathing, oxygen, pulse, blood pressure, alertness, temperature, pain, nausea, dressing condition, limb circulation and return of movement after spinal anaesthesia or nerve block. On the ward, staff continue monitoring medicines, blood glucose when relevant, fluid intake, urine, bowel symptoms, swelling, bruising, sensation, quadriceps control and walking safety.

Pain, Nausea and Medicine Side Effects

Pain is expected when the nerve block wears off and during transfers, walking and exercises. Treatment may combine paracetamol, anti-inflammatory medicine when suitable, local anaesthetic techniques and limited opioid medicine. The goal is tolerable pain that permits rest and rehabilitation, not a completely painless knee. Nausea, constipation, sleepiness, itching, confusion or urinary difficulty should be reported early.

Read Pain After Knee Replacement Surgery.

Wound, Dressing, Swelling and Bruising Checks

The team checks whether the dressing remains secure and whether staining is stable or increasing. Swelling and bruising around the knee, thigh, calf, ankle or foot are common. Rapidly increasing swelling, persistent drainage, spreading redness, severe calf tenderness or worsening after initial improvement requires assessment.

Read Wound Care After Knee Replacement and Swelling After Knee Replacement.

Food, Fluids, Urination and Constipation

Food and fluids restart when the patient is awake, stable and not excessively nauseated. Urinary retention can occur after spinal anaesthesia, surgery or opioid medicine and may require bladder assessment or temporary catheterisation. Constipation is common and is addressed through fluids, movement, fibre and prescribed medicine when required.

Blood Tests and Postoperative X-Rays

Testing is individualised. Blood count, kidney function, electrolytes or glucose may be checked when health, symptoms or surgical complexity justify it. Postoperative X-rays may document implant position and provide a baseline. Results are interpreted with the patient’s clinical condition.

When Walking and Physiotherapy Begin

NICE recommends rehabilitation on the day of surgery when possible and no later than 24 hours after primary joint replacement. Mobilisation begins when blood pressure, sensation, muscle control, pain and general condition are safe. The patient learns bed and chair transfers, walker or crutch use, short walks, ankle pumps, quadriceps activation and stair technique when required.

The inpatient goal is safe function and a clear home programme, not forced maximum bending. Read Walking After Knee Replacement and Physiotherapy After Knee Replacement.

Blood-Clot and Infection Prevention

Clot prevention may include early mobilisation, ankle exercises, hydration, compression devices, stockings in selected patients and anticoagulant medicine matched to bleeding and clotting risk. The wound should be handled only when necessary with appropriate hand hygiene. Family members should not touch the incision or dressing.

New calf pain or swelling needs prompt assessment. Chest pain, sudden breathlessness, coughing blood or collapse requires emergency care. Increasing wound redness, pain, cloudy drainage or fever may indicate infection and should be reported promptly.

Discharge Criteria After Knee Replacement

Discharge generally requires stable recovery from anaesthesia, manageable pain and nausea, ability to eat and drink, safe bathroom use, safe transfers and walking with the prescribed aid, acceptable wound and circulation, understanding of exercises and medicines, and a workable caregiver, transport and follow-up plan. Stair safety is checked when stairs are unavoidable at home.

What Should Be Explained Before Leaving Hospital?

Patients and caregivers should understand medicine names, doses and duration; blood-thinner precautions; dressing, bathing and stitch instructions; walking-aid use; exercises; activity limits; follow-up dates; physiotherapy arrangements; contact details; and urgent warning signs. The discharge summary and implant records should be retained.

Reasons Discharge May Be Delayed

Discharge may be delayed by uncontrolled pain or vomiting, persistent low blood pressure, oxygen or cardiac concerns, urinary retention, symptomatic anaemia, wound drainage, unsafe walking, repeated buckling, confusion, fever, inability to manage stairs or absence of safe support. These issues require evaluation rather than pressure to meet an advertised discharge target.

Transport Home and the First Evening

The patient should not drive home. The vehicle should permit safe entry, leg space and access to the walking aid. The first evening should focus on prescribed medicines, short safe walks, food and fluids, wound protection, elevation and rest rather than testing distance or repeated stairs. Continue with First Week After Knee Replacement.

Bilateral, Revision and Outstation Patients

Bilateral and revision procedures may require more assistance, closer monitoring and slower transfer and walking progression. Outstation patients need a written plan for accommodation, wound review, medicine access, travel timing and emergency contact. Discharge criteria remain safety-based regardless of travel arrangements.

Questions Patients Commonly Ask

Can I go home on the same day?

Selected patients can when medical, mobility, pain, wound and support criteria are met.

Does robotic surgery reduce hospital stay?

It may support an efficient pathway in selected patients, but discharge depends on the entire operation, anaesthesia, health and recovery—not the robot alone.

Will I walk on the day of surgery?

Many patients do when medically safe. Otherwise mobilisation should generally begin within 24 hours after primary replacement.

Can I leave hospital with swelling?

Yes. Swelling is expected. The team assesses its pattern together with the wound, circulation, pain and walking safety.

Can I be discharged while using a walker?

Yes. Safe walker use is a normal part of early discharge for many patients.

What if I live alone?

The team should assess whether family help, home care, community support or temporary rehabilitation is needed.

Can wound drainage delay discharge?

Yes. Persistent or increasing drainage requires assessment and a clear wound-management plan.

Is the stay longer after bilateral replacement?

Often, because transfers, walking, medical monitoring and caregiver needs may be greater, although recovery remains individual.

What records should I receive at discharge?

Keep the discharge summary, medicine list, wound and exercise instructions, follow-up details and implant records or stickers where provided.

Clinical References and Further Reading

NICE NG157: Postoperative care and rehabilitation after joint replacement

AAOS OrthoInfo: Activities After Total Knee Replacement

NHS: Recovering From a Knee Replacement

About Dr. Mayur Rabhadiya

Dr. Mayur Rabhadiya is an Orthopedic and Joint Replacement Surgeon in Mumbai. His focused knee practice includes total and partial replacement, minimally invasive mini-subvastus robotic knee replacement, bilateral planning, revision assessment and structured postoperative recovery. His qualifications are MBBS, D’Ortho, DNB (Orthopedics), MNAMS (Orthopedics) and FIJR (Robotic & Navigation).

Last medically reviewed: 24 July 2026. Medical reviewer: Dr. Mayur Rabhadiya.

Book a Knee Replacement Recovery Consultation

Patients who need clarity about hospital stay, discharge readiness, walking safety, bilateral or revision recovery, or postoperative follow-up can consult Dr. Mayur Rabhadiya in Ghatkopar East or Ghatkopar West, Mumbai. Call or WhatsApp +91 84249 03913 or +91 96113 30063, or use the orthopedic appointment page.

Medical Disclaimer

This guide provides general education and does not replace the operating surgeon, anaesthetist, physiotherapist or hospital protocol. Length of stay, medicines, testing, walking, wound care and discharge criteria vary according to health, procedure and recovery.