		Return to theatre	3	0
		Pain	12	13
		Vomiting	13	16
		Blood in vomit	7	9
		Anaesthetic	3	5
		Patients unhappy about discharge	4	14
2	Auf et al. (1997) [5] , UK	KTP laser: 20 ml	KTP laser, out of 38 patients
		Dissection: 52 ml	0 patients had a primary haemorrhage.
		Significant difference between the two	6 patients had a secondary haemorrhage of whom 2/6 patients required readmission (but not surgery).
		Groups p < 0.01.

			Dissection:
			No primary or second haemorrhage was observed in any patient.

3	D’eredita and Marsh (2004) [6] , USA	Minimal for both groups (around 5 ml).	Authors report that in both groups no early haemorrhage occurred during the first 24 hours and no late haemorrhage was reported by parents during follow-up.


4	Strunk and Nichols (1990) [7] , USA	KTP laser: 17.65 ml	There were no occurrences of primary haemorrhage.
		Dissection: 58.59 ml	There were no occurrences of primary haemorrhage.
		Significant difference between the two	Secondary haemorrhage
		Groups p < 0.01.	KTP laser: 1 (24) patient had a secondary haemorrhage, which resolved after chemical cautery.


			Dissection: 1 (37) one patient had secondary haemorrhage, which resolved spontaneously.


			Left laser: 1 patient had a secondary haemorrhage on the right dissection site, which required operative cautery.


			Right laser: No secondary haemorrhage events were observed (0/10).

			One patient in the laser group needed suture ligature to control bleeding.

5	Saito, Honda and Saito (1999) [8] , Japan	Authors note that intraoperative blood loss	1 patient developed a secondary
		was dramatically reduced with the use of the	haemorrhage on the conventional side
		KTP laser.	9 days after surgery.
		Postoperative bleeding: