miniNAV®

The smallest differential pressure valve

for the treatment of HC in premature and newborn babies and recumbent patients

FEATURES

  • smallest differential pressure valve with reliable drainage control for the treatment of hydrocephalus, especially in premature and newborn babies or lying patients

  • very small, slim, cylindrical design for easy implantation

  • MRT compatible up to 3 Tesla

  • precise precision engineering

  • robust and durable due to the use of titanium

FUNCTIONALITY

The miniNAV was developed with the aim of offering the smallest possible valve with solid drainage control and at the same time avoiding the well-known problems such as blockage and dependence on subcutaneous pressure.

The figure shows a schematic drawing of the miniNAV. The valve consists of a stable titanium housing with an integrated ball-cone valve. A spiral spring determines the opening pressure of the ball-cone valve. The sapphire ball guarantees a precise closure. A connector or a silicone catheter can be connected to the distal end of the valve. The connecting nozzles for the inlet and outlet are also made of titanium.

The illustration below shows the miniNAV and how the valve works: If the ball-and-cone valve is closed, CSF drainage is not possible. If the intraventricular pressure increases, this force acts on the ball-cone valve and finally causes the spring to give way and a gap to form between the cone and the ball, which now allows the cerebrospinal fluid to flow.

Flow direction

Ball-cone valve closed

Ball-cone valve opened. Liquor flow possible.

PRESSURE LEVEL DETECTION IN X-RAY IMAGE

Each preset pressure stage is specially coded and can be recognized postoperatively in imaging. The lower illustrations show the X-ray images of all available pressure stages of the miniNAV (0, 10 and 15 cmH2O):

 

pressure stage 0 cmH2O

 

 

pressure stage 5 cmH2O

 

 

pressure stage 10 cmH2O

 

 

pressure stage 15 cmH2O

 

 


 

MIETHKE APP - UNDERSTANDING VALVES EASILY


The MIETHKE App shows clearly and quickly understandable how our valves work:

+ Influence of the body position on the opening pressure: The motion sensor of the smartphone simulates the body position of the patient: upright - inclined - lying.

+ Pressure stage recognition in the X-ray image: Every set or preset pressure stage is shown here and can be easily recognized by means of templates.

+ Simulation of adjustability: Valves can be easily adjusted with the finger and thus help to understand what is happening inside the valve.

+ View into the inside of MIETHKE valves: All valves allow a view of their construction and thus the influence of the cerebrospinal fluid flow on the functioning can be shown in an easily understandable way.

+ free for Apple and Android

 

   

miniNAV®

Download Information

miniNAV_Brochure_EN.pdf

miniNAV Brochure

miniNAV_GBA021_07_0817_WEB_Neu.pdf

Instructions for use

PHB_21_06_1019_FG_WEB.pdf

Patient Manual

DO YOU HAVE ANY QUESTIONS ABOUT THE PRODUCT?
WE ARE THERE FOR YOU.

Thoralf Knitter

Head of Research & Development

Roland Schulz

Head of Product Management

Thammo Weise

Product Management

Andreas Bunge

Product Management

Michaela Funk-Neubarth

Head of Marketing & HR

Jan Mügel

Product Management

Josefine Kehl

Press & Public Relations

August von Hardenberg

Product Management

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OUR PARTNERSHIP
WITH B. BRAUN

B. Braun and MIETHKE - Together for a better life with hydrocephalus

We have a long and intensive partnership with B. Braun in the field of neurosurgery. We are driven by a common vision: to improve the lives of hydrocephalus patients around the world with innovative solutions.

Our partnership is an exciting combination of B. Braun's nearly 180 years of expertise as one of the world's leading medical device and pharmaceutical companies and our agility as an innovative company and technology leader in gravitation-based shunt technology. 

 

Our strong partner in neurosurgery:

www.bbraun.com