Diagnosis of Post-Operative Breathlessness

A 60-year-old female presents with sudden onset breathlessness and hypotension, noted as $80/50$ mm Hg, on the 3rd day after a total abdominal hysterectomy.

Clinical Scenario Analysis

• Sudden Breathlessness: This acute respiratory symptom post-surgery is a major red flag.
• Hypotension: The recorded blood pressure of $80/50$ mm Hg indicates significant hemodynamic compromise.
• Post-Operative Context: Major surgery, particularly abdominal procedures like hysterectomy, increases the risk for certain complications, including thromboembolic events. Immobility in the post-operative period is a key contributing factor.

Evaluating Potential Diagnoses

• Thromboembolism: This is the most probable diagnosis. Sudden breathlessness and hypotension post-surgery are classic signs of a pulmonary embolism (PE), often stemming from a deep vein thrombosis (DVT) in the legs or pelvis. The patient's age and surgical status place her at increased risk.
• Postural Hypotension: While possible after surgery, it's primarily linked to changes in body position and typically wouldn't manifest as severe, sudden breathlessness.
• Secondary Haemorrhage: This would usually involve signs of active bleeding (e.g., vaginal bleeding, dropping hematocrit). While severe anaemia can cause breathlessness, sudden onset points more strongly towards PE.
• Transient Ischaemic Attack (TIA): Symptoms are neurological (e.g., weakness, vision loss, speech difficulty) and not primarily respiratory or related to systemic hemodynamic collapse.

Final Assessment

Considering the patient's presentation – sudden breathlessness and hypotension occurring 3 days after a total abdominal hysterectomy – thromboembolism (specifically pulmonary embolism) is the most fitting diagnosis.