Respiratory System Flashcards
What form does Salbutamol come in and what is the dose?
2.5mg/2.5ml nebule or 5mg/2.5ml nebule. 5mg initial dose, no max limit.
The indications of _________ is acute asthma attack where normal inhaler has failed, expiratory wheezing associated with allergy, anaphylaxis, smoke inhalation or other lower airway cause, exacerbation of COPD.
Salbutamol
There are no contraindications of __________ in an emergency.
Salbutamol
The cautions of __________ include hypertension, angina, overactive thyroid, late pregnancy, severe hypertension with people on beta blockers.
Salbutamol
What form does Ipratropium Bromide come in and what is the dose?
250mcg/1ml nebuliser liquid. 500mcg dose (2ml) - max dose.
What are the 3 indications of Ipratropium Bromide?
- Acute severe or life-threatening asthma
- Acute asthma unresponsive to Salbutamol
- Exacerbation of COPD - unresponsive to Salbutamol.
What are the 3 cautions of Ipratropium Bromide?
Use with care in patients with Glaucoma (protect eyes from mist), Pregnancy/breast feeding, Prostatic Hyperplasia.
What form does Adrenaline 1:1000 come in and what is the dose?
1mg/1ml pre-filled syringe or ampoule.
0.5ml dose (500mcg) - no limit.
The indications of _________ ____ are anaphylaxis, life-threatening Asthma with failing ventilation and continued deterioration - despite nebuliser therapy.
Adrenaline 1:1000
What are the 2 cautions of Adrenaline 1:1000?
Severe hypertension may occur in patients on non-cardioselective beta-blockers (like Propranolol).
Do not administer IV adrenaline in anaphylaxis.
What are the three tiny bones called in the Nasal Cavity?
Inferior, Middle and Superior Nasal Conchae
(1) What is the nasal cavity lined with? (2) What do they contain?
(1) Respiratory Mucosa Cells (2) These contain cilia, that moves dirt laden mucous
Respiratory mucosa cells that line the nasal cavity are what type of cells? And what do they contain?
Ciliated Columnar Epithelial Cells that contain mucous-secreting goblet cells.
What is the main function of mucous?
To warm and moisten inhaled air before it goes down to the lungs
What are the 5 openings of the Nasopharynx?
2 Pharyngeal tonsils, 2 auditory tubes, and a nostril
What are the two sets of tonsils?
Palatine tonsils and lingual tonsils
What is the Adam’s apple called and where is it located?
Thyroid cartilage located in the laryngopharynx
What does the epiglottis do and where is it located?
The epiglottis closes when swallowing food to stop food going down the larynx and into the lungs, and it is situated in the laryngopharynx.
What is the larynx also known as and why?
The voice box, because it houses the vocal chords.
What are vocal chords and what do they do?
Gathered mucous membranes that cover up the ligaments, which vibrate when air passes over them, producing sound waves (speech).
Why is the anterior view of the larynx important for paramedic practice?
A needle may be used for emergency airway puncture in the Cricothyroid ligament, which is in between the Thyroid cartilage and the Cricoid cartilage.
What is the trachea also known as?
The windpipe
What does the trachea divide in to?
Two large branches - the primary bronchi.
What is the trachea and bronchi made up of?
Epithelial tissue, smooth muscle, and rings of cartilage to ensure it doesn’t collapse under the change of pressure between the lungs and the airway.
What are the 3 layers of the lungs?
Parietal layer, Visceral Pleura and Pleural Cavity
How many lobes does the right lung have and what are they called?
3 lobes; Superior, middle and inferior
How many lobes does the left lung have?
2 lobes; Superior and inferior
What is the diaphragm?
A dome-shaped thin skeletal muscle used in respiration.
What does the diaphragm do during inhalation?
Contracts and flattens, creating a vacuum effect.
What happens to the diaphragm during exhalation?
It relaxes
What controls the diaphragm?
The phrenic nerve, which runs down from the neck to the diaphragm.
What is Boyle’s law and how does it relate to respiration?
If the pressure decreases - the volume increases.
During breathing this means that the contraction and relaxation of muscles acts to change the volume in the thoracic cavity, and as the thoracic cavity and lungs move together, this changes the volume of the lungs.
What is Charles’ Law and how does it relate to respiration?
If the temperature increases - so does the volume.
This means that when cold air is inhaled, the volume will change as it warms in passing through the nose.
The pressure of a mixture of gas is the sum of the pressures - of those individual components is recognised as _________ ____. This relates to the lungs as gases go from an area of high pressure to low pressure, so the partial pressures of inhaled and alveolar air determine why oxygen goes into the alveoli, and why carbon dioxide leaves the alveoli.
Dalton’s Law (of partial pressures)
What is Henry’s Law and how does it relate to respiration?
The amount of a gas that dissolves in a liquid is directly proportional to the partial pressure of that gas.
This explains how gases dissolve across the alveoli, as the higher the gas, the more gas will be dissolved into the blood.
What is passive inspiration?
The phase of ventilation which air enters the lungs
What is passive expiration?
The phase of respiration in which air is expelled from the lungs.
What respiratory muscles initiate passive inspiration?
The diaphragm (flattens) and external intercostal muscles (expands thoracic cavity).
What respiratory muscles initiate passive expiration?
The diaphragm (relaxes) and internal intercostal muscles (relaxes)
What is active inspiration?
Contraction of the accessory muscles to increase the volume of thoracic cavity - usually during exercise or an asthma attack.
What is active expiration?
Contraction of several thoracic and abdominal muscles to decrease the volume of the thoracic cavity.
What is external respiration?
The exchange of gases with the external environment at an alveolar level.
What are the 3 main modes of transport of Carbon Dioxide?
Through bicarbonate ions (HCO3-), by blood plasma, and by erythrocytes.