Ultrasound-Guided Renal Access Custom Model

The Challenge:

Generally, ultrasound models are used to train clinicians and technicians on how to use ultrasound imaging technology and do not accommodate surgery.  This model was meant to simulate renal access, so the model needed to be operable.  In this case, operable means puncturable.

Model Design:

Since ultrasound imaging does not pass thru the air, the model was designed to be submerged in water as opposed to gel encapsulation which is typical in ultrasound models.  This new approach enabled easy component replacement, lighter weight, and economical use.  Pulse MDM designed the model to tilt, accommodating a wide range of needle entry points, and included ribs to mimic realistic clinical challenges.  For an additional but common and important challenge, the Pulse MDM design included an inferior section of the lung.  Frequently, the air within the lung obstructs clinicians from seeing the upper pole calyx using ultrasound.

Model Development:

Pulse MDM sent ultrasound samples of the kidney and lungs to the client for evaluation. A spleen was added for context, and a replaceable two-layer tissue plate was developed consisting of durable skin and very soft fat for compliance with the ultrasound scanner.  Pulse MDM narrowed down the entry points from 9:00 to 3:00 to access kidneys laterally.  The model was designed to enable wire navigation from the kidney down to into ureter.

Model Solution:

This model enables Boston Scientific to train physicians to use ultrasound for PCNL, which is not commonly utilized in the United States.  This initiative is purely for the education of their urology customers. With appropriate training, ultrasound-guided renal access for PCNL can lead to reduced radiation exposure, accurate renal access, and excellent stone-free success rates and clinical outcomes.

Although this custom model is not available for sale to the public, we would be delighted to make you a specific version of your unique medical device and procedure. Please use this link to start the process of receiving a model concept, a visual representation of how clinicians and patients will experience your product and procedure. Pulse MDM does not charge for model concepts or the conversations around them, so there is no risk in seeing how we can help you to tell your story in the most engaging and memorable way possible.

Naviguide Percutaneous Access Needle Overview:

Naviguide helps reduce the complexity of achieving precise access for removing challenging renal stones.

The NaviGuide Needle’s enhanced design is intended to complement widely taught percutaneous access techniques specifically for urologists gaining access when performing percutaneous nephrolithotomy (PCNL) procedures. Precisely track and guide placement using fluoroscopic or ultrasound imaging. The clinician sets the adjustable slider using the markings on the needle to assist with depth control and provide an aid to limit overshooting. A radiopaque ring in the slider is a visual aid for the bull’s-eye approach. A dedicated gripping area for forceps and range of needle lengths to size to the patient improve control of the needle during advancement. The locking hub keeps the needle securely connected until removal. 

Procedure Overview:

Ultrasound-guided renal access for percutaneous nephrolithotomy (PCNL) is a safe, effective, and low-cost procedure routinely performed worldwide but a technique underutilized by urologists in the United States. With appropriate training, ultrasound-guided renal access for PCNL can lead to reduced radiation exposure, accurate renal access, and excellent stone-free success rates and clinical outcomes.