The port system, developed from fluid mechanics
Implantable, venous, CT-compatible port.
The most effective solution for long-term vascular access from specialists. In order to achieve optimal cleansing and flow characteristics, we have intensively studied fluid mechanics during the development of the Nu-Flow® chamber. Through the optimized port chamber geometry, we create turbine-like flow dynamics. This "small" cosmetically inconspicuous port, particularly suitable for cachectic or small patients, also has all the advantages of the NuPort® family.
The elliptical chamber associated with the tangential outlet improves flow dynamics and reduces the risk of premature occlusion.
The connection mechanism enables safe connection of the catheter to the port base via audible and tactile feedback. These two detection functions ensure that the connection is properly secure.
The advantages at a glance
- suitable for high pressure injection (contrast-CT compatible)
- optimized for cachectic and small patients
- greatly reduced risk of occlusion and infection
- significantly improved flushing efficiency
- minimal maintenance required
- facilitates blunt preparation of the port pocket
- MRI compatible up to 3-Tesla
- many catheter variants
- blood product administration
- blood collection
- parenteral nutrition
- high viscosity medications
Single lumen venous system for
Implantation by means of venous cutdown
NuPort®-LP-CT, catheter, catheter fixation,
Huber cannula straight, irrigation cannula,
vein lifter, 10 ml syringe
with percutaneous introducer set
Single lumen venous system for
Implantation by means of percutaneous technique
NuPort®-LP-CT Basic system,
introducer (Seldinger) needle,
Split-Sheath with dilator,
Guide wire with insertion aid, tunneler
|Flow Rate||5 ml/s||2 ml/s||2 ml/s|
|Catheter||Size||O.D.||I.D.||Length||Ref. without Introducer Set||
Ref. with Introducer
The measurable difference
In the FDA guidelines for the approval of ports, a defined measurement setup* is described, the so-called "Clearing Index". This indicates how much flushing volume is required to flush out (clean) a port chamber without leaving any residue. This test has also been adopted in the ISO standard for port catheter systems 10555-6**.
This can be used to illustrate the measurable differences between different port designs.
In a study by Norfolk Medical Inc., USA ***, the respective flushing characteristics were compared in a measurement of four different port systems. The difference between the system with a conventional cylindrical port chamber and central catheter outlet and our NuPort® chamber geometry with tangentially positioned catheter outlet is clear.
Almost 40% more flushing volume is required with a conventional port for residue-free flushing.
The chamber geometry therefore makes the decisive difference in the flushing (cleaning) of port systems. Under certain circumstances, this is precisely the difference that prevents occlusion of the port system.
Average values chamber flushing volume*
|Port||Port Chamber||Flushing volume difference in percent|
central baseline outlet
|Conventional Port A
High Pressure Injection
|Conventional Port B
* FDA "Guidance on 510(k) Submissions for Implanted Infusion Ports".
** DIN EN ISO 10555-6, Annex B "Determination of the flushing volume (clearing index)".
*** Measured values determined by Norfolk Medical, Inc. USA with reference to FDA "Guidance on 510(k) Submissions for Implanted Infusion Ports" and DIN EN ISO 10555-6