US 2026/0273235 A1 · NOVEL SELDINGER TECHNIQUE ACCESS WITH MICROVALVE ASSEMBLY

Abstract

Passive flashback devices enable one-handed guidewire insertion into a patient. A first device includes an elongate housing with a handle, a guidewire placement assembly with a wire feed channel, a passive guidewire feed surface, and a sheath brake, with or without an elastomeric microvalve assembly in the wire feed channel. A second device adds a guidewire carriage that slides along the housing between open and closed positions, with the microvalve assembly situated in a channel through a stanchion of the guidewire placement assembly. In both devices the guidewire moves freely and independently through the device without generating a vacuum. The microvalve assembly seals around the guidewire to prevent air embolism while allowing the operator to advance the guidewire with one hand. The operator's free hand simultaneously manipulates an ultrasound probe or other imaging device, improving speed and accuracy in interventional procedures including central line placement, nephrostomy, and vascular access.

Claims21

Dependent claims

A device for introducing a guidewire into a patient configured for one-handed operation comprising:

(a) an elongate housing having (i) a handle at its rearward end, (ii) a guidewire placement assembly at its forward end with a wire feed channel communicating with a mounting projection for a hollow needle, said elongate housing further defining an upwardly open guidewire feed area;
(b) a guidewire passive feed surface disposed rearwardly of the guidewire placement assembly and vertically aligned with the upwardly open guidewire feed area;
and
(c) a guidewire sheath brake disposed rearwardly of the guidewire passive feed surface.

1 more element

A passive flashback device for introducing a guidewire into a patient configured for one-handed operation comprising:

(a) an elongate housing having (i) a handle at its rearward end, (ii) a guidewire placement assembly at its forward end including a stanchion with a channel therethrough communicating with a hollow needle mounting projection which has a hollow needle mounted thereon communicating with the channel and (iii) said elongate housing further defining an upwardly open guidewire feed area;
(b) a guidewire carriage slidingly coupled to said elongate housing, the guidewire carriage having on its upper surface (i) a sheath brake, (ii) a wire feed channel and (iii) a passive guidewire feed surface, the guidewire carriage being positioned such that the wire feed channel and passive guidewire feed surface are vertically aligned with the upwardly open guidewire feed area of the elongate housing, the guidewire carriage being movable between an open position where the wire feed channel is spaced away from the channel on the stanchion of the guidewire placement assembly and a closed position where the wire feed channel engages the channel on the stanchion;
and
(c) a sheathed guidewire engaged with the sheath brake such that a sheath of the sheathed guidewire cannot move forwardly with respect to the sheath brake, and the guidewire, which is freely movable within the sheath, extends forwardly with respect to the sheath brake, over the passive guidewire feed surface, through the wire feed channel, the channel in the stanchion and through the hollow needle;
wherein the guidewire is untethered to the passive flashback device and wherein the passive flashback device does not include means for generating a vacuum.

2 more elements

Dependencies are inferred from the claim text.

Novel seldinger technique access with microvalve assembly

Life of this patent

Novel seldinger technique access with microvalve assembly

Life of this patent

Abstract

Claims21