ett_vol_ml {physiology}

Estimate volume inside an endotracheal tube

Description

Calculations are based on standard endotracheal tubes. The volume is estimated as the cylinder of the given diameter and typical length of a tube of given size.

Usage

ett_vol_ml(diameter_mm)

Arguments

diameter_mm

The internal diameter of the endotracheal tube in millimeters. Sizes between 2.0 and 8 are offered. Half sizes between 2.5 and 6 are accepted.

Value

Volumes of each given ETT in cubic millimeters

See Also

Other airway equipment: deadspace_things_ml, deadspace_total, ett_size_by_age

Examples

ett_vol_ml(2:8)
plot(2:8, ett_vol_ml(2:8))
lines(2:8, ett_vol_ml(2:8),
  xlab = "ETT internal diameter, mm",
  ylab = "ETT internal volume, mm^3")
(vols_cm3 <- ett_vol_ml(seq(2, 6, 0.5)) / 1000)

# Ages through to ETT internal volume
ett_vol_ml(ett_size_by_age(1:10))