module 3 Flashcards
(41 cards)
Respiratory distress in children arises from
derangement in pulmonary gas exchange and is identified by increased work of breathing, indicating that the child is actively compensating for the disturbance.
Why do Children rely heavily on rate of respiration for compensation?
This is because they are unable to increase respiration depth due to small lung volumes and the flattened diaphragm’s inability to move downward against the abdomen
Over time, increases in the work of breathing significantly increases what?
The metabolic rate and oxygen demand of the child, resulting in respiratory muscle fatigue and decreased respiratory effort as respiratory failure progresses.
o Prolonged inspiration occurs with
upper airway obstruction
o Prolonged expiration occurs with
lower airway obstruction
dyspnoea
distress during breathing
hyperpnoea
increased depth
seesaw (paradoxic) respirations
chest falls on inspiration and rises on expiration
retractions of the upper chest are associated with
with upper airway compromise.
retractions of the lower chest usually suggest
lower airway compromise
head bobbing or extension of the neck on
inspiration is a clinical manifestation of
infants in respiratory distress. Why does it occur
The inability of the underdeveloped sternocleidomastoid muscle to effectively support the effort of breathing results in an infant’s head moving forward and back with each breath
inspiratory stridor is associated with
upper airway disease
expiratory wheeze is associated with
lower airway disease
Why does grunting occur
It is heard at the end of expiration as the body attempts to generate positive-end pressure within the alveoli to prevent collapse.
Tachycardia is a compensatory mechanism that presents in hypoxic states to provide….
If not resolved, prolonged hypoxia can result in bradycardia, which is a signal that the child has
adequate systemic oxygenation.
exhausted all compensatory efforts and an arrest situation is pending.
cause of crackles and sound
Air passing through airways with fluid in them or opening up of collapsed alveoli.
Non-continuous sounds, low-medium pitch.
cause of wheeze and sound
Movement of air through narrowed airways.
High pitched musical sound
cause of pleural rub and sound
Friction caused by inflamed pleura.
Loud, low pitched
pH meaning and normal values
(hydrogen ion concentration)
7.35 - 7.45
pCO2 meaning and normal values
(partial pressure of carbon dioxide)
35 - 45 mm Hg
pO2 meaning and normal values
(partial pressure of oxygen)
80 - 100 mm Hg
HCO3 meaning and normal values
(bicarbonate ion concentration)
22 - 28 mmol/L
. The first heart sound is the lubb sound. What does it signify
it signifies closure of the AV valves (particularly the mitral valve) after ventricular systole. is louder than the second sound
The second heart sound is the dubb sound, it signifies the
closure of the semilunar valves at the beginning of ventricular diastole