Table 2.

Reason for overnight admission

Reason for admission	Patients (n)
Oxygen saturation < 93% on air	5
Pain requiring parenteral opioid analgesia	4
Conversion to open operation	2
Drain inserted	1
Nausea and vomiting	2
Acute retention of urine (female)	1
Sinus tachycardia	1
History of sickle cell trait	1