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Annals of Intensive Care

Table 2 ICU patients’ physiological characteristics

From: Accuracy of height estimation and tidal volume setting using anthropometric formulas in an ICU Caucasian population

 

ICU patients (n = 59)

P value

Diagnosis

  

 Cardiac arrest

18

 

 Coma

14

 

 ARDS

11

 

 Severe sepsis and shock

10

 

 ARF

4

 

 Other

2

 

Patients’ characteristics

  

 Sex ratio

41 male/18 female

 

 Actual body weight (ABW; kg)

74.4 ± 16.2

 

 Ideal body weight (IBW; kg)

64.1 ± 6.5

P < 0.0001

 Predicted body weight (PBW; kg)

64.1 ± 8.8

P < 0.0001

Ventilatory settings

  

 Respiratory rate (b/min)

18 ± 3

 

 Plateau pressure (cmH2O)

19 ± 4.5

 

 Vt (mL)

500 ± 56

 

 Vt ABW (mL/kg)

7.0 ± 1.4

 

 Vt IBW (mL/kg)

7.8 ± 0.8

P < 0.0001

 Vt PBW (mL/kg)

7.9 ± 1.0

P < 0.0001

  1. Results are provided as mean ± STD. A p value equal or below 0.05 was considered statistically significant
  2. ARDS acute respiratory distress syndrome, ARF acute respiratory failure, Vt tidal volume, ABW actual body weight, IBW ideal body weight, calculated according to the Lorentz formula (ref), PBW predicted body weight; both reference IBW and PBW were calculated using measured height. IBW and PBW were significantly different from ABW, but without difference between each other; Vt ABW is the tidal volume that was set on the ventilator, according to the patient actual weight, measured on admission; it was significantly different from either Vt IBW or Vt PBW, without any difference between each other
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