BackTable / VI / Topic / Procedure

Renal Artery Stenting

Renal Artery Stenting Procedure Prep

Learn more on the BackTable VI Podcast

BackTable is a knowledge resource for physicians by physicians. Get practical advice on Renal Artery Stenting and how to build your practice by listening to the BackTable VI Podcast, reading exclusing BackTable Articles, and following the work of our Contributors.

Ep 128 From Gadgeteer to the Boardroom: Device Innovation with IR and CMO Dr. Atul Gupta with Dr. Atul Gupta
00:00 / 01:04
BackTable CMEfy button

Stay Up To Date

Follow:

Subscribe:

Sign Up:

Pre-Procedure Prep

Indications

Renal artery stenosis with:
• Refractory hypertension and/or declining renal function
• Optimal medical therapy
Renal artery dissection
Hemodynamically significant stenoses:
• 70% stenosis on angiography
• Pressure gradient > 20 mmHg

Contraindications

• Uncorrectable coagulopathy
• Long segment renal artery occlusion
• Diffuse small branch stenoses
• Renal artery <4 mm
• Small atrophic kidney - suggests nonfunction

Pre-Procedural Evaluation

H&P - patient selection is critical
• Age of onset of hypertension
• Detailed evaluation of hypertension treatment and current medications
• Comorbidities
Imaging:
• Renal arterial Doppler: > 180 cm/s, tardus parvus waveform
• CTA/MRA
• Captopril renal scan
• Angiogram: reserved for potential planned intervention
Labs: Platelets, INR, GFR

Renal Artery Stenting Podcasts

Listen to leading physicians discuss renal artery stenting on the BackTable VI Podcast. Get tips, tricks, and expert guidance from your peers and level up your practice.

Procedure Steps

Medications

• Hold antihypertensives day of procedure
• Antibiotic: cefazolin 1 gram IV
• Heparin or bivalirudin

Access

Access
• May depend on operator comfort and angle of renal artery
• Femoral, brachial and radial
Place 6-Fr guide sheath
• IMA
• Renal standard curve, renal double curve

Angiogram and Stenting
Place sheath at level of renal artery but directed away from ostium
Advance crossing catheter and 0.014" crossing wire ~ 2 cm outside of guide catheter
Direct guide catheter toward ostium
Identify origin of vessel and degree of stenosis:
• Preprocedural planning
• Inject CO2 or contrast to delineate origin
Pull 0.014" wire into crossing catheter and then pull crossing catheter into sheath
Carefully cross lesion with 0.014" wire and crossing catheter
Average diameter of renal artery is 5-7 mm
Predilate
• Undersize balloon relative to artery
• Fully expand balloon
• Avoid higher pressure if balloon expanded at lower atmosheres
Balloon-expandable stents
• Width 5-7 mm
• Length 10-20 mm
• Cover entire length of stenosis
• Land proximal segment of stent 1-2 mm in the aorta
• Can use stent balloon to flare ostium by reinflating at higher pressure
Remove balloon - completely deflate or balloon could move stent
Final angiogram

Post-Procedure

Complications

• Renal artery embolization with infarction of renal parenchyma
• Guidewire perforation of renal artery with subcapsular, perirenal or perirenal hematoma
• Rupture of renal artery by balloon or stent
• Misplacement of stent and dislodgement of stent
• Stent restenosis, thrombosis and infection
• Renal artery pseudoaneurysm
• Acute renal failure
• Access site complications
• Major complications < 5%

Post-Procedural Care

• Bed rest depends on sheath size and potential arterial closure device
• Overnight observation with monitoring of blood pressure, urine output, and follow up creatinine level
• Hypotension following stenting common
• Continue IV fluids
• Aspirin 325 mg PO daily
• Most operators will also initiate plavix 75 mg PO for at least 1 month

Follow-Up

• Bed rest depends on sheath size and potential arterial closure device
• Overnight observation with monitoring of blood pressure, urine output, and follow up creatinine level
• Hypotension following stenting common
• Continue IV fluids
• Aspirin 325 mg PO daily
• Most operators will also initiate plavix 75 mg PO for at least 1 month

Outcomes

• 66% of HTN patients will see improved BP control and/or reduced antihypertensive medication need
• 75% of renal insufficiency patients will see plateau or improvement in GFR

References

[1] Prince M, Tafur JD, White CJ. When and How Should We Revascularize Patients With Atherosclerotic Renal Artery Stenosis?. JACC Cardiovasc Interv. 2019;12(6):505‐517. doi:10.1016/j.jcin.2018.10.023
[2] Cooper CJ, Murphy TP, Cutlip DE, et al. Stenting and medical therapy for atherosclerotic renal-artery stenosis. N Engl J Med. 2014;370(1):13‐22. doi:10.1056/NEJMoa1310753
[3] Judd E, Calhoun DA. Apparent and true resistant hypertension: definition, prevalence and outcomes. J Hum Hypertens. 2014;28(8):463‐468. doi:10.1038/jhh.2013.140
[4] Stathopoulos JA. Modification of the No-Touch Technique during Renal Artery Stenting. Case Rep Vasc Med. 2013;2013:516267. doi:10.1155/2013/516267
[5] Egan BM, Zhao Y, Axon RN, Brzezinski WA, Ferdinand KC. Uncontrolled and apparent treatment resistant hypertension in the United States, 1988 to 2008. Circulation. 2011;124(9):1046‐1058. doi:10.1161/CIRCULATIONAHA.111.030189
[6] Funaki B. Renal ostial angioplasty and stenting. Part 1: the routine procedure. Semin Intervent Radiol. 2009;26(1):74‐81. doi:10.1055/s-0029-1208385
[7] Funaki B. Renal ostial angioplasty and stenting. Part 2: pitfalls and complications. Semin Intervent Radiol. 2009;26(2):151‐158. doi:10.1055/s-0029-1222460
[8] Rocha-Singh K, Jaff MR, Lynne Kelley E; RENAISSANCE Trial Investigators. Renal artery stenting with noninvasive duplex ultrasound follow-up: 3-year results from the RENAISSANCE renal stent trial. Catheter Cardiovasc Interv. 2008;72(6):853‐862. doi:10.1002/ccd.21749
[9] Goldstein JA, Kolluri R, Rocha-Singh K. Technical Considerations for Renal Artery Stenting. Vascular Disease Management. 2006;3(3)

Disclaimer: The Materials available on https://www.BackTable.com are for informational and educational purposes only and are not a substitute for the professional judgment of a healthcare professional in diagnosing and treating patients. The opinions expressed by participants of the BackTable Podcast belong solely to the participants, and do not necessarily reflect the views of BackTable.

Earn CME When You Listen to BackTable CMEfy

Podcasts

New Tools to Treat Severe Distal Femoropopliteal Disease with Dr. John Rundback on the BackTable VI Podcast)

Articles

Contributors

Related Topics