Treatment of malignant airway obstruction with Y-shape sigma stent loaded with I125 seeds installed via rigid bronchoscopy

Table 1 Demographic features of the patients (N = 33)

	Number	Percentage (%)
Gender
Male	19	57.6
Female	14	42.4
Age
≤ 50	3	9.1
51–60	9	27.3
61–70	12	36.4
> 70	9	27.2
Smoking
Yes	18	66.2
No	15	33.8
Comorbidity lung diseases
COPD	20	60.6
Bronchiectasis	5	15.2
Silicosis	2	6.1
Tuberculosis	6	18.1
Location of lung cancer
Trachea	12	36.4
Carina of trachea	4	12.1
Left bronchi	4	12.1
bronchi	13	39.4
Cell type of the tumors
Squamous cancer	21	63.6
Adenocarcinoma	12	36.4
Combined with chemotherapy
Yes	16	48.5
No	17	51.5
Grade of airway obstruction *
III	2	6.1
IV-V	31	93.9
TNM stages
Stage II	6	18.2
Stage III	7	21.2
Stage IV	20	60.6
KPS score prior to the treatment
50–59	9	27.3
40–49	14	42.4
30–39	10	30.3

*Severity of the tumor-associated airway obstruction was determined as previously described [Wang, 2021]. Grade I: ≤ 25% airway obstruction with mild coughing; Grade II: 26–50% airway obstruction with mild coughing and short of breath; Grade III: 51–75% airway obstruction with moderate coughing and short of breath; Grade IV: 76–90% airway obstruction with severe chest tightness, short of breath, and difficulty in breathing; Grade V: 91–100% airway obstruction with very severe chest tightness, short of breath, and difficulty in breathing

ISSN: 1471-2466