Effect of ablated bronchial blood flow on survival rate and pulmonary function after burn and smoke inhalation in sheep

Atsumori Hamahata, Perenlei Enkhbaatar, Sakurai Hiroyuki, Motohiro Nozaki, Daniel L. Traber

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The bronchial circulation plays a significant role in the pathophysiological changes of burn and smoke-inhalation injury. Bronchial blood flow markedly increases immediately after inhalational injury. This study examines whether the ablation of the bronchial artery attenuates pathophysiological changes and improves survival after burn and smoke-inhalational injury in an ovine model. Acute lung injury was induced by 40% total body surface-area third-degree cutaneous burn and cotton smoke inhalation (48 breaths of cotton smoke, <40 °C) under deep anaesthesia. Twelve adult female sheep were divided into two groups: (1) sham (injured, non-ablated bronchial artery, n = 6); (2) ablation (injured, ablated bronchial artery, n = 6). Ablation of the bronchial artery was performed 72 h before the injury. The experiment was continued for 96 h. Burn and smoke-inhalation injury significantly increased regional blood flow in the bronchi. Ablation of the bronchial artery significantly reduced acute regional blood flow increases in the proximal and distal bronchi. All animals in the ablation group survived to 96 h. Four of these were successfully weaned off the ventilator. Three animals of the sham group met standardised euthanasia criteria at 60 h, while another met the criteria at 78 h. The lung wet-to-dry weight ratio, histology score and myeloperoxidase (MPO) activity were significantly increased by the insult, but ablation of the bronchial artery attenuated these changes. Burn and smoke-inhalation injury induced a significant increase in bronchial blood flow and accelerated airway obstruction, pulmonary vascular changes, pulmonary oedema and pulmonary dysfunction. Ablated bronchial circulation attenuated these pathophysiological changes.

Original languageEnglish (US)
Pages (from-to)802-810
Number of pages9
JournalBurns
Volume35
Issue number6
DOIs
StatePublished - Sep 2009

Fingerprint

Inhalation Burns
Bronchial Arteries
Smoke
Sheep
Smoke Inhalation Injury
Survival Rate
Lung
Regional Blood Flow
Pulmonary Edema
Bronchi
Wounds and Injuries
Euthanasia
Acute Lung Injury
Body Surface Area
Airway Obstruction
Mechanical Ventilators
Inhalation
Peroxidase
Blood Vessels
Histology

Keywords

  • Acute respiratory distress syndrome
  • Bronchial artery
  • Neutrophils
  • Smoke inhalation
  • Survival rate

ASJC Scopus subject areas

  • Emergency Medicine
  • Critical Care and Intensive Care Medicine
  • Surgery

Cite this

Effect of ablated bronchial blood flow on survival rate and pulmonary function after burn and smoke inhalation in sheep. / Hamahata, Atsumori; Enkhbaatar, Perenlei; Hiroyuki, Sakurai; Nozaki, Motohiro; Traber, Daniel L.

In: Burns, Vol. 35, No. 6, 09.2009, p. 802-810.

Research output: Contribution to journalArticle

Hamahata, Atsumori ; Enkhbaatar, Perenlei ; Hiroyuki, Sakurai ; Nozaki, Motohiro ; Traber, Daniel L. / Effect of ablated bronchial blood flow on survival rate and pulmonary function after burn and smoke inhalation in sheep. In: Burns. 2009 ; Vol. 35, No. 6. pp. 802-810.
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