Nursing care
Sudden shortness of breath after a hip replacement: what the nurse does first
Written and reviewed by Daniel Kim, BSN, RN, PCCN · 4 min read · Updated October 2026
Short answer
Treat sudden breathlessness after a hip replacement as a possible pulmonary embolism. Stay with the client, raise the head of the bed, give oxygen as prescribed or per protocol, and check oxygen saturation, pulse and blood pressure. Then call the provider or rapid response team. Hip and knee surgery is a recognised risk for clots that travel to the lungs.
First action: support breathing and stay
The first actions are to stay with the client, raise the head of the bed and give oxygen as prescribed or under protocol, while checking oxygen saturation. Sudden shortness of breath after orthopaedic surgery of the hip or knee fits a pulmonary embolism, where a clot from a leg vein blocks blood flow in the lungs. Low oxygen is the immediate threat.
This is a breathing priority. Reference texts describe sudden dyspnoea, chest pain on breathing, a fast heart rate and low oxygen levels as common findings, with fainting or low blood pressure in more severe cases. The signs are not specific to PE, so the nurse acts on the possibility rather than waiting for a diagnosis that only imaging can give.
Assess, escalate and prepare
With oxygen running, assess the respiratory rate, oxygen saturation, heart rate and rhythm, blood pressure and level of consciousness. Ask about chest pain and look for a swollen, tender calf. Then notify the provider or rapid response team with these findings. If blood pressure is falling or the client becomes confused, escalate as an emergency.
Prepare for what usually follows: IV access if not already in place, blood tests, an ECG and imaging, as the provider orders. Keep the client on bed rest and avoid massaging the legs. Anticoagulation decisions belong to the provider, who will weigh them against bleeding risk at the surgical site.
What can wait and what can be delegated
Walking the client, routine physiotherapy, wound care and comfort tasks wait until the client is assessed and stable. Pain relief matters, but giving an opioid for chest pain before assessing breathing can mask a problem and further depress respiration. Documentation follows the immediate response.
An assistant can bring the pulse oximeter, oxygen equipment or the emergency trolley, and can call for help. Assessing the client, interpreting oxygen and blood pressure trends, and deciding to escalate stay with the registered nurse. A client with new, unexplained breathlessness is unstable and is not suitable for delegation of ongoing monitoring.
Worked scenario: day two after hip replacement
Hypothetical practice question: a client on the second day after a total hip replacement suddenly reports difficulty breathing and feels anxious. The pulse is fast and oxygen saturation has fallen from baseline. Which action should the nurse take first? Options: give the prescribed oral pain medicine; place the client flat and elevate the legs; raise the head of the bed and apply oxygen; check the dressing for bleeding.
Raising the head of the bed and applying oxygen is correct because it addresses breathing and low oxygen straight away. Pain medicine is tempting because anxiety and discomfort are present, but it does not treat hypoxia. Lying flat worsens breathing. Checking the dressing assesses bleeding, which is a reasonable concern, yet breathlessness with falling saturation is the more urgent threat.
Why the tempting distractors are wrong
Anxiety is a common distractor. A client who suddenly feels restless or afraid after surgery may be hypoxic, so reassurance alone or a sedative misses the cause. Encouraging deep breathing and incentive spirometry is helpful after surgery in general, but it does not answer a sudden change that looks like a clot.
Another distractor is completing a full head to toe assessment before acting. In this situation focused checks of breathing, oxygen and circulation come first, alongside support. Similarly, waiting for the next set of routine vital signs delays care. The exam reasoning is that a sudden change in breathing is acute and unexpected, which places it ahead of expected postoperative findings.
Sources and further reading
Pulmonary Embolism, MSD Manual Professional Edition. Hip and knee replacement as risk factors, sudden dyspnoea, pleuritic chest pain, tachycardia and hypoxaemia, nonspecific signs, oxygen for hypoxaemic patients.
Pulmonary embolus, MedlinePlus. Symptoms including sudden shortness of breath, chest pain, fast heart rate and coughing up blood; surgery on joints and bed rest as risk factors; urgent care.
Venous Thromboembolism: Symptoms, NHLBI. Shortness of breath and pain on breathing when a clot travels to the lungs; seeking care right away.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our cardiovascular practice questions are the closest set to what this page covers.
Common questions
Why does hip replacement raise the risk of pulmonary embolism?
Reference texts list hip and knee replacement among the surgical risk factors for clots. Surgery can injure veins, reduced movement slows blood flow, and the body's clotting response increases after surgery. A clot that forms in a leg vein can break off and travel to the lungs.
Which signs of pulmonary embolism should a nurse look for?
Sudden shortness of breath, chest pain that may worsen on breathing in, a fast heart rate, low oxygen saturation, anxiety, coughing up blood and dizziness or fainting are described. None is specific on its own, and some clients have few signs, so a sudden change after surgery is escalated.
Should the nurse give anticoagulant medicine straight away?
Starting or changing anticoagulation is a provider decision based on the clinical picture and the client's bleeding risk after surgery. The nurse supports breathing, assesses and escalates promptly, then gives prescribed medicines and monitors for bleeding once a plan is in place.
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