Clinical application of a curved video suspension laryngoscope in laryngeal surgery

Figures & data

Figure 1. Curved laryngoscope customized with medical plastic materials (a). Curved video SL system connected to a video camera and LCD monitor (b). A set of curved instruments designed by us (c). Available instrument holder was connected with the anatomically shaped curved video laryngoscope (d).

Table 1. Incidence of postoperative complications after different suspension laryngoscopy (SL).

Variable	SL (n = 128), n (％)	Curved video SL (n = 185), n (%)	p Value
Age ($\overline{X }$± s, years)	48.91 ± 11.131	47.19 ± 11.494	.189
Sex			.393
Male	56 (43.75)	90 (48.65)
Female	72 (56.25)	95 (51.35)
BMI (IQR, kg/m^2)	25 (22.80–27.88)	25 (22.90–27.75)	.821
Complications			<.001
Yes	39 (30.47)	2 (1.08)
No	89 (69.53)	183 (98.92)

BMI: body mass index; SL: suspension laryngoscope

p Values showing differences between the two suspension laryngoscopes.

Table 2. Oropharyngeal complications of conventional SL and curved video SL.

Complications	SL (n/128)	Curved video SL (n/185)	p Value
Swallowing discomfort	1/128	0/185	<.001
Oral mucosa injuries
The gums	3/128	0/185	<.001
Mucosa	26/128	2/185	<.001
Lips	7/128	0/185	<.001
Temporary lingual nerve injuries	2/128	0/185	<.001

SL: suspension laryngoscope

p Values showing differences between the two suspension laryngoscopes.

Table 3. Comparison of surgical time of conventional SL and curved video SL.

	SL (IQR)	Curved video SL (IQR)	p Value
Surgical time/(min)	15.0 (11.00–20.00)	10.0 (7.00–15.00)	<.001

SL: suspension laryngoscope

p Values showing differences between the two suspension laryngoscopes.

Table 4. The results of multivariate logistic regression of each factor and postoperative complications.

Variable	B value	Standard error	p Value	Adjusted odds ratio (95% CI)
Age (years)	0.25	0.017	.144	1.03 (0.99–1.06)
Sex
Female	0.53	0.384	.167	1.70 (0.80–3.61)
Male^a
BMI (kg/m^2)	0.63	0.052	.222	1.07 (0.96–1.18)
Suspension system
SL	2.93	0.544	<.001	18.80 (6.47–54.60)
Curved video SL^a

BMI: body mass index; SL: suspension laryngoscope; CI: confidence interval

^aFor comparison.

Figure 2. Laryngeal exposure and a precise bimanual monitor-guided operation with curved video SL. The entire glottis was exposed including the anterior commissure. Preoperative image (a). Interoperative image (b). Postoperative image (c). Bimanual operation (d).