Effects Of Intubation And MV

Question 1

Discuss the issues and complications of MV on the cardiovascular system

Answer 1

Positive intra thoracic pressure (decreased venous return and SV)
Decreased perfusion pressure (difference between alveolar pressure and pulmonary artery pressure

Question 2

Discuss issues and implications of intubation and MV on gas movement, secretion mvmt, respiratory muscle function and respiratory mechanics

Answer 2

Increased airway resistance (bronchospasm and narrow tube)
Increased dead space
Decreased MCC (no glottis closure, decreased cilial action, decreased sol layer, decreased PEFR)
Gas to non dependent areas
No sighs = decreased FRC, reduced surfactant production and micro atelectasis
Increased risk of infection (bypass upper airway)
Increased risk of trauma (mucosal necrosis, vocal cord damage, stenosis)
MV >48hrs = decreased diaphragm strength and endurance
Baro/volutrauma