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JA Clinical Reports

Table 1 Ventilating parameter in the case report referred in the “Discussion” section [6]

From: The effects of chest drainage on pressure-controlled ventilation

 

Before drainage

After drainage

Conversion of PCV to VCV

P-TPP (cmH2O)

14

24

34

EE-TPP (cmH2O)

4

14

14

PEEP (cmH2O)

4

4

4

Chest tube drainage (cmH2O)

0

10

10

Driving Pressure (cmH2O)

10

10

20

TV (ml)

450

250

450

  1. P-TPP peak transpulmonary pressure, EE-TPP end-expiratory transpulmonary pressure, PEEP positive end-expiratory pressure, TV tidal volume, PCV pressure-controlled ventilation, VCV volume-controlled ventilation
  2. In this case, TV decreased by 10 cmH2O of the chest drainage even with the same driving pressure and PEEP because both P-TPP and E-TPP were changed by the commencement of the chest drainage. To gain the same TV, an increase in driving pressure, which meant an increase in P-TPP, was required because of increased elastance by overextension, which was generated by an increase in E-TPP by the commencement of chest drainage
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