Skip to main content

Table 1 Patients’ characteristics

From: Optimizing high-flow nasal cannula flow settings in adult hypoxemic patients based on peak inspiratory flow during tidal breathing

 

Overall

No. of patients

49

Age, mean (SD), years

58.0 (14.1)

Gender (male), n (%)

27 (55%)

Height, mean (SD), cm

167.7 (10.5)

Predicted body weight, mean (SD), kg

61.9 (11.2)

Ethnicity, n (%)

 African American

18 (37%)

 Caucasian

17 (35%)

 Hispanic/Latino

10 (20%)

 Asian

4 (8%)

Smoker, n (%)

21 (43%)

 Smoking package years

20 (3.5, 39)

Cause of acute hypoxemic respiratory failure

 COVID-19 pneumonia

25 (51%)

 Postoperative respiratory failure

10 (20%)

 Non-COVID-19 pneumonia

5 (10%)

 Congestive heart failure

5 (10%)

 Lung cancer

3 (6%)

 Sickle cell anemia, acute chest

1 (2%)

Comorbidity, n (%)

 Chronic lung disease

8 (16%)

 Chronic heart disease

17 (35%)

 Hypertension

29 (59%)

 Diabetes mellitus

13 (27%)

 Obesity (BMI ≥ 30 kg/m2)

9 (18%)

 Obstructive sleep apnea

7 (14%)

 Cancer

15 (31%)

HFNC parameters at study enrollment

 FIO2, mean (SD)

0.62 (0.16)

 SpO2, median (IQR), %

94 (93, 95)

 SpO2/FIO2, mean (SD)

160 (40)

 ROX index, mean (SD)

7.65 (3.05)

 Gas flow, median (IQR), L/min

45 (37.5, 50)

Breathing measurement

 Tidal volume, median (IQR), ml

468 (399, 548)

 RR, median (IQR), bpm

21 (18, 26)

 Ti, mean (SD), sec

1.24 (0.41)

 Peak tidal inspiratory flow, mean (SD), L/min

34 (9)

 Peak tidal inspiratory flow, median (IQR), L/min

31 (27, 42)

  1. HFNC, high-flow nasal cannula; FIO2, fraction of inspired oxygen; SpO2, pulse oximetry; RR, respiratory rate; ROX, (SpO2/ FIO2)/RR; Ti, inspiratory time; BMI, body mass index; SD, standard deviation; IQR, inter-quartile range