emt chapter 10

regarding oxygen is correct

oxygen supports the combustion process and may cause a fire

good mask-to-face seal and oxygen flow rate of 15 L/min, the nonrebreathing mask is capable of delivering up to

90

w/o adequate oxygen, body cells

incompletely convert glucose into energy, and lactic acid accumulates in the blood

diaphragm is innervated by ___ nerve

phrenic

which of the following statements regarding pos pressure ventilation is correct

with pos-pressure ventilation, more volume is required to have the same effects as normal breathing

partial pressure of oxygen in alveoli is ____ mm Hg, while partial pressure of co2 is alveoli is ___

104, 40

23 severe head trauma after motorcycle collided with oncoming truck. unconscious, rapid and shallow breathing, and copious bloody secretions in mouth

alternate 15 secs of oral suctioning w 2 mins of assisted ventilation

you and partner are caring for a critically injured pt. partner is controlling bleeding from pt lower extremities as you attempt ventilations with bag-valve-mask. after repositioning mask several times, unable to effectively ventilate pt. you should

begin ventilation using mouth-to-mask

which oxygen flowmeters is not affected by gravity and can be used in any position

bourdon-gauge flowmeter

inhalation occurs when

diaphragm and intercostal muscles contract and cause a decrease in intrathoracic pressure

contained within mediastinum

esophagus

despite attempts to coach

explain you will assist

how does CPAP improve oxygenation and ventilation in pt with certain respiratory problems

forces alveoli open and pushes oxygen across membrane

hypoxic drive is influenced by

low blood oxygen levels

single emt managing an apneic pt airway, preferred initial method of providing ventilation is

mouth-to-mask technique with one-way valve

Breathing adequacy

pt breathing shallowly may require assisted ventilation despite a normal RR

while providing CPAP to pt in severe respiratory distress, you note that his heart rate has increased by 20 b/mins. he is conscious, but is no longer following verbal commands. you should

remove CPAP and ventilate w bag-valve mask

central chemoreceptors located in the medulla provide feedback to increase the rate and depth of breathing when they sense

slight increase in co2 or decrease in the pH of cerebrospinal fluid