How Medical Ports Show Power Injection Rating on X-rays

This patent describes a medical port that has special X-ray visible markings to clearly show if it's safe for high-pressure injections, helping doctors avoid mistakes after the port is inside a patient.

What it covers

This patent describes a venous access port assembly that includes a base, a peripheral surface, and a septum. The key feature is the peripheral surface, which has X-ray discernable indicia, or markings, that identify the port as safe for power injection. These markings are integrally molded into the surface. For example, the peripheral surface itself might be made of an X-ray visible material, and the markings could be either more of that material or tiny voids (empty spaces) within it. Alternatively, the surface could be mostly transparent to X-rays, with the markings created by applying an X-ray blocking substance, or by making voids in that applied substance. This allows medical staff to confirm the port's capabilities even after it has been surgically placed inside a patient.

What it doesn't cover

• —Does not cover venous access ports that lack X-ray discernable indicia to identify power injection rating.
• —Does not cover indicia that are not integrally molded into the peripheral surface of the port.
• —Does not cover X-ray visible markings on medical devices other than venous access port assemblies.
• —Does not cover indicia that are visible only to the naked eye and not designed for X-ray imaging.
• —Does not cover ports where the X-ray discernable indicia do not relate to power injection rating.

The clever bit

The cleverness lies in making critical information, specifically the power injection rating, permanently and internally visible via X-ray imaging after a medical device has been implanted. This is achieved by molding the indicia directly into the port's structure using X-ray visible materials or voids, ensuring the information cannot be lost or obscured.

Why it matters

Venous access ports are essential for long-term medical treatments like chemotherapy, allowing repeated access to a patient's bloodstream. Some ports are designed to withstand high-pressure injections, known as 'power injections,' which are used for certain imaging scans. Using a non-power-rated port for a power injection can cause serious complications, including port rupture or patient injury. This patent helps prevent such errors by making the port's power injection rating clearly visible on X-rays, which are often used to check port placement.

Real-world examples

• 1.Implantable venous access ports
• 2.Power-injectable port systems
• 3.Medical devices requiring post-implantation identification
• 4.Central venous catheters with integrated features