Overview 2 Flashcards
What are the four paranasal air sinuses?
Ethmoid
Frontal
Sphenoid
Maxillary
Three functions of paranasal air sinuses are?
Humidify the air
Lighten the weight of the skull
Enhance resonance
Which paranasal air sinus is the most superiorly located?
Frontal sinus
Which paranasal air sinus is the most inferiorly located?
Maxillary sinus
Which paranasal air sinus is the most posteriorly located?
Sphenoid sinus
Which paranasal air sinus is just medial to the eyes?
Ethmoid sinus
Which paranasal air sinus is just lateral to the nose?
Maxillary sinus
Which paranasal air sinus is superior to the eyes?
Frontal
Which sinus cannot be seen in the coronal view and why?
Sphenoid sinus - most superiorly located
What is the ethmoid sinus known as?
Ethmoid air cells
What are the two main arteries that supply the nose (origins)?
External carotid artery
Internal carotid artery
What is the blood supply to the nose from the internal carotid artery?
Opthalmic artery
What are the five arteries that supply the nose?
Anterior ethmoidal artery Posterior ethmoidal artery Sphenopalatine artery Greater palatine artery Septal branch of the superior labial artery
What are the three main arteries that provide the blood supply to the nose?
Opthalmic artery x2
Maxillary artery x2
Facial artery x1
What is epistaxis?
Nose bleed
Majority of epistaxis is anterior or posterior? and what percentage?
Anterior - 90%
Posterior nose bleeds are more common in whom? x2
Elderly
Those with clotting disturbance
Most common cause of epistaxis?
Kisselbach’s plexus
What is sinusitis? Which sinus is affected?
Inflammation in the maxillary sinus
Consequence of sinusitis?
Inflammation can cause swelling and this can then block drainage of the sinuses
Which sinus is very closely associated with the pituitary gland?
Sphenoidal air sinus
First line treatment for sinusitis is?
Vasoconstrictors to reduce blood flow - reduces swelling
Second line treatment for sinusitis and inidications for this?
Antibiotics
If sinusitis is bad with a high fever
What is at the midline of the oral cavity?
Uvula
What is lateral to the uvula on both sides?
Tonsils
What are the two arches of the oral cavity?
Palatoglossal arch
Palatopharyngeal arch
Where are the arches of teh oral cavity in relation to each other?
Palatoglossal - more anteriorly located
Palatopharyngeal - more posteriorly located
Where does the frontal sinus exit into the nasopharynx?
Into the middle conchae
Where does the ehtmoid sinus exit into the nasopharynx?
Directly into the posteiror wall of the nasopharynx
Where does the maxillary sinus exit into the nasopharynx?
Into the middle conchae
What is the Kisselbach area?
This is where five facial arteries anastomose in the nose
What is the significance of Kisselbach area?
Trauma here can result in epistaxis
What is Waldeyer’s ring?
Four tonsils in the mouth organised into a ring
What are the four tonsils of Waldeye’s ring?
Superior to inferior: Adenoid tonsil Tubal tonsil Palatine tonsil Lingual tonsil
When is treatment required for tonsillitis?
When very severe - antibiotics
Indication for tonsil removal?
When very very very severe
Adverse effect of removal of tonsils?
Post tonsillectomy bleeding - very vascular region
Fatal complication of tonislitis is? (rare)
Quinsy - abscess formation in the peritonsilar space
Three components of the pharynx are?
Nasopharynx
Oropharynx
Laryngopharynx
Innervation to the pharynx is?
Sensory - glossopharyngeal IX
Motor - vagus X
Most superior bone of the larynx is?
Hyoid bone
Which cartilage ring is the only one that goes all the way around the trachea?
Cricoid cartilage
Which level is the cricoid cartilage at?
C6
Which level is the hyoid bone at?
C3
Laryngeal prominence formed by which cartilage?
Thyroid cartilage
Potential space located in the neck is called?
Retro-pharyngeal pouch
When can the potential space of the neck become a real space?
Name?
Infection of the larynx
Retro-pharyngeal pouch
Relation of vocal fold and vestibular fold
Vocal fold - more medial
Vestibular fold - more laterally located
Function of primary cricothyroid tensor muscles?
Increases the length and tension of the vocal folds
Increases the pitch of the voice
Central to the vocal folds is?
Rima glottidis
Function of the internal laryngeal nerve?
Sensation - cough reflex
Function of the external laryngeal nerve?
Motor to the cricothyroid muscles - increase the pitch of voice
Function of the recurrent laryngeal nerve?
Motor to all intrinsic muscles apart from cricothyroid muscle
Sensory below vocal folds
Innervation to the cricothyroid muscle is?
External laryngeal nerve (from superior laryngeal nerve)