SARELGAURMD
Interventional Radiologist
MSK Procedures:
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Shoulder Injection, Fluoro-Guided (YE Method):
Patient Set-up
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Pt. should be on the table supine
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YE prefers anterior approach. For AA, the target is the rotator interval or the supero-medial HH.
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While pt. supine, externally rotate arm to open up shoulder joint
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Use fluoro with intermittent pulsing
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find region of interest, collimate and place in center of field
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Mark area using hemostat and surgical marking pen
Table Set-up
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Set up table:
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Have RN help with drawing up meds
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Draw up 5-10 ml of lidocaine for skin anesthesia
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Draw up 1 ml of kenalog and 4 ml of lidocaine for injectate solution
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Draw up 10-20 ml of contrast, attach tubing and make sure tubing is full of contrast and no bubbles
Procedure:
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Prep area with iodine or chloraprep
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Drape area
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Use 22 G needle to begin advancement
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Advance needle at marked site
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Ensure perpendicular to beam, check with intermittent fluoro
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According to YE, should go in a couple inches
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Will sort of feel a loss of resistance at the joint, also you want to go until you feel bone (the HH, superomedial aspect)
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When in joint, remove inner stylet, inject lidocaine to ensure no resistance to flow
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If fairly certain in joint, injection the contrast from the tubing
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Now take images, check to ensure intraarticular pattern, SAVE IMAGE
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Now take injectate (4 ml lido and 1 ml kenalog) and inject entire mixture into the joint
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Check under fluoro, should see the contrast DILUTING because its mixing with the injectate in the joint
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*If joint infected or has effusion, remove 5-10 cc of fluid before injecting mixture to avoid pressurizing the joint acc. to YE
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When injectate injected, replace stylet, and then remove the needle quickly
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Apply pressure with gauze
Procedure complete
Addt'l Help:
Good website detailing procedure with pics
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Knee Injection, US-Guided (YE Method):
Patient Set-up
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Pt. should be on bed supine
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Knee can be fully extended, sometimes helps to bend slightly by placing pillows or wedge underneath knee
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Make sure bed height is up so don't have to bend
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YE prefers lateral approach
US Scanning:
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Use linear tranducer, 10 Mhz or so
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Scan the suprapatellar region, scan along long axis of quad tendon
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There should be fluid just lateral to the tendon, in the lateral pouch / gutter
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The fluid will have a triangular appearance
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Check with doppler to exclude vascularity along needle path
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Optimize settings with respect to gain, focal zone, depth
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Want to have tranducer transverse to long axis of quad tendon, so can visualize needle entering from lateral and going along long axis of probe
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Mark spot with surgical pen
Procedure:
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Prep and drape area
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Numb with lidocaine
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Set up probe cover
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Set up probe for real time guidance, transverse to long axis of quad tendon, want to enter needle from lateral along long axis of probe
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Use 20 or 22 G spinal needle
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Visualize needle entering into fluid
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When intra-articular, remove inner stylet, inject injectate (variety of injectates but often hyaluronic acid)
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Replace stylet, and remove needle
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Apply pressure and small dressing if nesc.
Procedure complete
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Hip Injection, US-Guided (YE Method):
Patient Set-up
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Pt. should be on bed supine
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Make sure bed height is up so don't have to bend over
US Scanning:
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Use linear tranducer, 10 Mhz or so
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Scan the groin region, identify femoral vessels (SFA and SFV) which are medial, make sure to stay lateral of this area
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Want to scan both longitudinal to iliopsoas tendon and transverse
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The approach will be longitudinal
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Should see femoral neck to head junction
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Should be able to see IP tendon superficially and should see thickening where the capsule is
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Goal is to advance neede to head / neck junction or head region, where you will be under the capsule
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Mark spot with surgical pen
Procedure:
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Prep and drape area
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Numb with lidocaine
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Set up probe cover
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Set up probe for real time guidance, longitudinal orient probe to long axis of iliospoas tendon, want to enter needle from lateral along long axis of probe
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Use 20 or 22 G spinal needle
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Visualize needle touching femoral head
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When intra-articular, remove inner stylet, inject lidocaine to see if flows freely (no resistance). Then inject injectate (same as shoulder, 1 ml of steroid, 4 ml of lidocaine)
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Replace stylet, and remove needle
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Apply pressure and small dressing if nesc. Take post procedure US image
Procedure complete