A 65-year-old man who underwent a total knee arthroplasty 2 days earlier reports feeling well except for mild postoperative knee pain. You are called to evaluate him for postoperative fever.
Examination Temperature, 39°C Pulse, 95 beats/min Blood pressure, 138/90 mm Hg Respiratory rate, 16 breaths/min Oxygen saturation, 92% while breathing room air Lungs: normal except for a few crackles with first inspiration Foley catheter in place; urine looks clear Findings on remainder of examination are unremarkable Medications and Findings Dalteparin, 5000 U/d Lopressor, 50 mg twice daily Cefazolin, given for 24 hours at time of surgery, now stopped White blood cell count, 10.5 × 10 9 /L *This case is from Docplexus editorial team for educative purpose only Source: Clinical pearls in perioperative medicine