22-gauge, 3.5in (8.9cm) because smaller hole decreases risk of CSF leakage - ANSWER✔✔-what size
needle should be used for a lumbar puncture and why?
lateral recumbent is preferred but sitting is also acceptable - ANSWER✔✔-what position should patient
assume for lumbar puncture?
to reduce risk of post-puncture headache and to obtain an accurate opening pressure - ANSWER✔✔-why
is the lateral recumbent position preferred?
to adopt the fetal position or arch back like a cat to widen the gap between spinous processes -
ANSWER✔✔-once patient is in correct position, what should you instruct the patient to do?
between L3--L4, or L4-L5 because these points are below termination of spinal cord - ANSWER✔✔-
where should a needle be inserted for lumbar puncture?
subclavian vein or IJ? - ANSWER✔✔-when inserting a CVL, which site has the least risk of complications?
infection of placement site, traumatic injury proximal to insertion site, known areas of deficient collateral
circulation (raynauds, thromboangitis) - ANSWER✔✔-what are the contraindications for A line
placement?
fourth to fifth intercostal space in the anterior or mid axillary line at the horizontal level of the nipple;
once this is felt, move hand laterally toward anterior axillary line which is the area of incision, the
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