Pao2 change during progressive pulmonary edema in dogs

Kudoh, Ichidai; Segawa, Yoshio; Numata, K; Kitamura, Hitoshi

doi:10.1097/00003246-198512000-00007

Cited by 5 publications

(1 citation statement)

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“…These adverse respiratory mechanical changes can be attributed to a significant increase in the pulmonary edema extent subsequent to severe hemodilution manifested in the significant drop in Hct level. The excessive edema development in the animals of Group 3 may lead ultimately to deterioration in gas exchange [17–19], and may be a risk factor for the development of acute respiratory distress syndrome [20]. Hypoxemia was not observed in the present study due to the relatively limited drop in CaO 2 and Hct that allowed the maintenance of physiological homeostasis and the short duration of the experiment (90 min).…”

Section: Discussionmentioning

confidence: 76%

Optimal crystalloid volume ratio for blood replacement for maintaining hemodynamic stability and lung function: an experimental randomized controlled study

et al. 2019

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Background Crystalloids are first line in fluid resuscitation therapy, however there is a lack of evidence-based recommendations on the volume to be administered. Therefore, we aimed at comparing the systemic hemodynamic and respiratory effects of volume replacement therapy with a 1:1 ratio to the historical 1:3 ratio. Methods Anesthetized, ventilated rats randomly included in 3 groups: blood withdrawal and replacement with crystalloid in 1:1 ratio (Group 1, n = 11), traditional 1:3 ratio (Group 3, n = 12) and a control group with no interventions (Group C, n = 9). Arterial blood of 5% of the total blood volume was withdrawn 7 times, and replaced stepwise with different volume rations of Ringer’s acetate, according to group assignments. Airway resistance (Raw), respiratory tissue damping (G) and tissue elastance (H), mean arterial pressure (MAP) and heart rate (HR) were assessed following each step of fluid replacement with a crystalloid (CR1-CR6). Lung edema index was measured from histological samples. Results Raw decreased in Groups 1 and 3 following CR3 ( p < 0.02) without differences between the groups. H elevated in all groups ( p < 0.02), with significantly higher changes in Group 3 compared to Groups C and 1 (both p = 0.03). No differences in MAP or HR were present between Groups 1 and 3. Lung edema was noted in Group 3 ( p < 0.05). Conclusions Fluid resuscitation therapy by administering a 1:1 blood replacement ratio revealed adequate compensation capacity and physiological homeostasis similar with no lung stiffening and pulmonary edema. Therefore, considering this ratio promotes the restrictive fluid administration in the presence of continuous and occult bleeding.

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Section: Discussionmentioning

confidence: 76%