Table 1.

Detailed data of included patients.

Patient	Age (yo)	Gender	Height (cm)	Weight (kg)	BMI	ASA	MP	Duration of ventilation (min)	Duration of surgery (min)	Minimal SaO2 (%)	Peak pCO2 (mmHg)	Pathology	Surgical procedure
No. 1	59	F	158	48	19,2	2	2	50	35	100	38	Benign epidermoid cyst on the right aryepiglottic fold	Explorative DL with microsurgery (cold steel)
No. 2	53	M	181	73	22,3	2	2	45	35	100	39	Recurrent cT2N0 squamous cell carcinoma right glottis	DL +Biopsy
No. 3	66	M	172	82	27,7	2	1	50	40	100	40	Bilateral hyperkeratosis of the vocal cords	TLM
No. 4	39	M	175	106	34,6	2	1	60	35	93	40	Iatrogenic tracheal stenosis	DL with CO2-laser treatment
No. 5	58	M	182	76	22,9	2	2	40	25	100	40	Posterior glottic stenosis caused by bilateral arytenoid ankylosis (grade IV)	CO2-laser assisted posterior cordotomy
No. 6	33	M	190	67	18,6	2	1	40	20	91	36	Neoplasia in the right subglottis	DL + Biopsy
No. 7	54	M	170	72	24,9	3	2	30	15	100	31	Leukoplakia in the right pyriform sinus	TLM
No. 8	43	F	172	68	23,0	1	1	50	30	100	44	Idiopatic subglottic stenosis (Cotton Myer grade III)	CO2-laserincision and balloon dilation
No. 9	67	M	186	85	24,6	2	2	115	65	94	38	Chondrosarcoma (grade I) in the right hemilarynx	DL with CO2-laser debulking
No. 10	73	M	178	95	30,0	3	2	60	15	89	48	Relapse glottis SCC (with subglottic expansion)	DL + Biopsy
No. 11	54	F	170	96	33,2	2	2	65	50	93	50	Idiopathic subglottic stenosis	CO2-laser incision and balloon dilation
No. 12	65	M	172	78	26,4	2	1	40	25	92	37	Suspicious lesion anterior right vocal cord	TLM
No. 13	44	F	169	74	25,9	3	2	45	35	100	48	Subglottic stenosis	CO2-laser incision and balloon dilation
No. 14	57	M	186	105	30,4	2	1	45	25	98	43	Recurrent polipoid lesion left vocal process	TLM
No. 15	45	F	160	60	23,4	2	2	45	25	95	49	Posterior glottic stenosis caused by left arytenoid ankylosis (grade III)	Laser –assisted partial arytenoidectomy

ASA, American Society of Anesthesiologists score; BMI, Body Mass Index; DL, Direct Laryngoscopy; MP, Mallampati Score; yo, years old.