Introduced by the Swedish radiologist Sven-Ivar Seldinger in 1953, the technique replaced surgical cut-downs with a simple guided sequence: puncture with a hollow needle, pass a guidewire, remove the needle and advance a sheath or catheter over the wire.
Today it is the standard for arterial and central venous access in angiography, PCI, central lines and drainage placement. Every step depends on components that fit together exactly. MedNet supplies them as sterile single-use products and in bulk for your own kits.
The vessel is punctured with a hollow Seldinger needle. Blood backflow confirms the tip sits in the lumen.
Seldinger Needles →The guidewire is advanced through the needle. An insertion tool feeds the wire into the hub in a controlled way.
Guidewire Insertion Tool →With the wire in place, the needle is withdrawn and a small skin incision widens the entry site for the sheath.
Safety Scalpels →The introducer with dilator is advanced over the wire. Dilator and wire are removed; the haemostatic valve keeps the access sealed.
Introducers →Catheters, wires and contrast pass through the sheath. Control syringes and guidewire torquers support precise handling.
Control Syringes →Torquers →After the sheath is removed, a radial compression device applies controlled pressure to the puncture site.
Radial Compression Devices →The access site sets the sheath size, length and guidewire. Here is how our introducer ranges compare.
A method for percutaneous access to blood vessels and other hollow organs. A needle punctures the vessel, a guidewire is passed through it, the needle is removed and a sheath or catheter is advanced over the wire. It avoids a surgical cut-down and is used for arterial lines, central venous catheters, angiography and interventional procedures.
It depends on the vessel and the guidewire diameter. As a rule, larger needles such as 18G accept .035″–.038″ wires, while 21G needles are used with thinner wires for a smaller puncture. MedNet offers Seldinger needles from 18G to 21G in lengths of 4 to 11 cm. Always check the product's IFU for compatibility.
Femoral introducers are used for access via the groin and come in larger French sizes (F5–F8) for .038″ wires. Radial introducers are designed for the wrist: smaller (F5–F6), for thinner wires and available with a hydrophilic coating for smooth advancement.
Yes. Several products, such as safety scalpels and the radial compression device, are available bulk non-sterile for kit packers and contract manufacturers. Our team will help you put together a complete access set.
Every product page in the Product Finder lists specifications and downloads. Electronic instructions for use are available on our eIFU page.
One partner for every component of your access set, from our own brand or our partner network.
Deep experience with vascular access components and their requirements.
Alternatives on hand whenever your plans need to change.
Reliable quality and documentation for regulated products.
Single-use sterile items or bulk non-sterile supply for kit packers.
