Pre-Lab#21 Flashcards
Is the external jugular vein easily cut? What is its course?
Yeah, b/c it is so superficial.
It lies deep to the platysma & crosses the SCM obliquely
What layer of fascia covers the EJV?
the superficial investing layer of deep cervical fascia
IS the EJV or IJV more suited to puncture?
IJV is better for needle or catheter insertion
What is the difference b/w IJV on the left & right sides?
Right sides go straight down, but left sides have an angle. Better to insert catheter on the right side.
How many lumens do the central venous lines have?
1 or many. they all have different purposes.
How do you hit the vein & not something else when you are putting in a central venous line?
guided by ultrasound device
otherwise palpate internal carotid artery & guess where the IJV is laterally.
What is the target of the central venous line?
target is SVC to measure O2 saturation CVPressure Long-term IV meds (b/c they cause phlebitis long term in peripheral veins) dialysis
What are the possible complications of a CVC?
pneumothorax
infections
venous thrombosis
Aside from the retropharyngeal space, where are other places that are good for spread of infection?
right in front of the trachea, behind the thyroid gland
another is under the platysma & over the superficial investing layer of fascia.
Carotid sinus is seen as a dilation of which artery?
the internal carotid artery
Where is the carotid body found?
it is found as a yellowish grayish body at the bifurcation of the internal & external carotid arteries…
this is a collection of chemoreceptors
What do the chemoreceptors of the carotid body sense? What is this innervated by?
pO2, pCO2, pH & temp changes of the arterial blood
branch of glossopharyngeal nerve
“sinus nerve of Herring”
The baroreceptors in the carotid sinus sense what? What is their innervation?
sense BP
innervated by branch of CN9 “sinus nerve of Hering”
How should you check pulses in people with carotid sinus hypersensitivity?
radial artery pulse or something
they could faint otherwise if you put any pressure there.
What are some variants of the internal carotid artery position? Is this detrimental?
internal carotid artery looped around transverse process of cervical vertebrae–usu w/o symptoms
internal carotid artery w/ loops-usu w/o symptoms
kinking of internal carotid artery b/c caught bone spurs & transverse process of cervical spinal column–problem esp if it happens on both sides
