Drain fluid amylase as a predictor of postoperative salivary fistula in cases with benign parotid tumours

BMC Oral Health

Table 1 Demographic, intraoperative and postoperative characteristics

	Ages (mean ± SD)	P value
Cases Without Salivary fistula	53 ± 17	0.098
Cases Without Salivary fistula	45 ± 14	0.098
	Case Without Salivary fistula	Cases With Salivary fistula	P value
Gender(M/F)	24/15	11/7	0.975
Surgical procedures^*
a	13	6	0.618
b	8	7
c	7	2
d	9	3
Pathology
Pleomorphic adenoma	15	8	0.338
Warthin tumor	14	6
Branchial cyst	4	0
Kimura’s disease	1	0
Calcifying epithelioma	1	0
Basal cell adenoma	3	0
Cystadenoma	0	1
Neurilemmoma	0	1
Parotid masseter fascia’s persistence
Intact
Partial	13	4	0.006^**
Few	14	21
Reconstruction of surgical defect	4	0
none
Sternocleidomastoid muscle flap	36	17
Parotid flap	3	0	0.192
	0	1	0.192
	Draining output (ml) (mean ± SD)	DFA(U/L) (median)	Duration of postoperative pressure dressing application (day) (mean ± SD)
Case Without Salivary fistula	58 ± 37.679	18,366.5	9.0 ± 4.485
Case With Salivary fistula	73 ± 60.042	80,132.5	9.3 ± 3.088
*P value*	0.283	< 0.001	0.818

* Surgical procedure includes:a: tumor enucleation; b: tumor and partial superficial parotidectomy; c: tumor and partial superficial parotidectomy with branched facial nerve dissection; d: tumor and partial superficial parotidectomy with total facial nerve dissection
**P = 0.006 when comparing three extent of parotid masseter fascia’s persistence “intact”, “partial”, “few”; while P = 0.019 when comparing “intact” and “partial”

ISSN: 1472-6831