ett_vol_ml: Estimate volume inside an endotracheal tube

In jackwasey/physiology: Calculate physiologic characteristics of awake and anesthetized adults, children and infants

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))

jackwasey/physiology documentation built on March 19, 2024, 6:31 a.m.