ARTERIAL - OTHER TYPES OF LE ARTERIAL EVALUATION

transcutaneous oximetry

determines capability of healing of a wound or specific site for amputation by measuring oxygen supply and consumption in tissues surrounding the wound

how does transcutaneous oximetry work

electrodes heat the skin to 45 degrees, oxygen escapes from tissue to be measured by the sensor. takes app 15-20 min

for transcutaneous oximetry, a reading is done at the _____ as a baseline

chest

for transcutaneous oximetry, readings are done at the _____, _____, and _____

• toes

• lower leg

• thigh

normal TcPO2 levels

70-80 mmHg

TcPO2 under _____mmHg indicates tissue hypoxia

40

amputation must be done at an area of tissue that has _____ healing capabilities

normal

transcutaneous oximetry - an abnormal reading in the ankle but a normal reading at the upper calf means what kind of amputation

amputation below the knee

transcutaneous oximetry - an abnormal reading in the ankle and the upper calf but normal distal thigh means what kind of amputation

amputation above the knee

two main erectile structures of the penis

corpus callosum

the right and left cavernosal arteries course through the

corpus callosum

the urethra and urethral arteries pass through the

corpus spongiosum

what supplies blood to the internal pudental artery

internal iliac artery

the internal pudental artery branches into the ______ which branches into the ______ and the ______

penile artery, dorsal artery, cavernosal artery

in order to become erect, resistance must _____ in the penile arteries

decrease

priapism

painful, prolonged erection that occurs without sexual stimuli

what can priapism be caused by

• veno occlusive disease in the pelvic veins

• av fistula in the pelvic region

steps to obtaining a penile blood pressure

• obtain cfa and tibial artery waveforms w bilateral abi

• penile blood pressure is obtained on a flaccid penis, compared to systolic bp

a penile blood pressure of under _____mmHg usually indicates impotence due inflow disease

60

penile brachial index

>.75 is normal

.65 - .75 is marginal reduction

<.65 is abnormal

if the pbi is normal in the initial exam, what can be done

papaverine is injected

after injecting papaverine and the pbi goes down, what should be suspected

vasculogenic impotence

after injecting, the cavernosal arteries will dilate over _____% of their resting diameter

75

after injecting, a psv increase of over _____ cm/s is considered normal

30

a difference of over _____ cm/s in psv between the left and right cavernosal arteries suggests arterial disease

15

arteriography

invasive procedure that uses iodinated contrast to demonstrate vessel patency during fluoroscopic techniques

most common insertion point catheter insertion point for lower extremity

femoral artery

seldinger technique

puncture of artery and insertion of a small catheter

in arteriography, contrast opacifies the vessel lumen and areas of absent contrast indicate

obstruction