Transient mechanical benefits of a deep inflation in the injured mouse lung

The lasting effects of a recruitment maneuver (RM) in the injured lung are not well characterized. We speculated that the reduction in respiratory elastance (H) after a deep inflation (DI) is transient in nature and should be sustained longer at higher positive end-expiratory pressure (PEEP). Thirteen ventilated mice were given 2 DIs at various levels of PEEP before and after saline lavage. Forced oscillations were used to measure H periodically over 7 min after the DIs. Time constants (tau) were estimated for the post-DI recovery in H. Values for tau before lavage (80-115 s) were reduced after lavage (13-30 s) at all levels of PEEP (P = 0.0001). PEEP did not significantly influence tau before or after lavage. The plateau level and total recovery in H after a DI were significantly influenced by PEEP and lavage (P < 0.0001). Our results suggest that for a DI to be beneficial in the injured mouse lung, it may have to be applied several times a minute.

Lundblad, LennartLund University,Lunds universitet,Klinisk fysiologi och nuklearmedicin, Malmö,Forskargrupper vid Lunds universitet,Clinical Physiology and Nuclear Medicine, Malmö,Lund University Research Groups(Swepub:lu)zoof-llu (författare)
Parsons, P (författare)
Bates, JHT (författare)
Klinisk fysiologi och nuklearmedicin, MalmöForskargrupper vid Lunds universitet (creator_code:org_t)

Ingår i:Journal of Applied Physiology: American Physiological Society93:5, s. 1709-17151522-16018750-7587

Av författaren/redakt...: Allen, G; Lundblad, Lennar ...; Parsons, P; Bates, JHT

Om ämnet

MEDICIN OCH HÄLSOVETENSKAP: MEDICIN OCH HÄLS ...; och Medicinska och f ...; och Fysiologi

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