DILATOR

• US 20160331941A1
• Filed: 10/15/2015
• Published: 11/17/2016
• Est. Priority Date: 05/11/2015
• Status: Abandoned Application

• Current Assignee: Yugen Kaisha Okid
• Original Assignee: Yugen Kaisha Okid
• Inventors: OKADA, Yosuke
• Application Number:
  US14/883,947
• Publication Number:
  US 20160331941A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61M 25/0026 Multi-lumen catheters with stationary elements catheter assemblies comprising a catheter in combination with a guide tube, sheath or sleeve A61M2025/0681; catheters comprising telescoping coaxial elements A61M2025/0175
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/09041 Mechanisms for insertion of guide wires
• CPC Class Codes: A61M 29/00 Dilators with or without means for introducing media, e.g. remedies instruments for performing visual medical inspections of cavities or tubes of the body A61B1/00

Abstract

The invention provides a dilator having characteristics as an inexpensive instrument that allows insertion of a guidewire for assisting insertion of a catheter into a vessel in a simple and smooth manner. A first through-hole 5 into which a guidewire can be inserted is pierced over an entire region of a dilator 1 from a distal end face 3a to a rear end face 3b in the longitudinal direction of the dilator. A second through-hole 7 into which a guidewire can be inserted is pierced over a region of the dilator 1 from a midway to the rear end face 3b in the longitudinal direction of the dilator. A tapered portion 9 is formed such that it is tapered toward the distal end face 3a. An opening 7a a of the second through-hole 7 is open on the surface of the tapered portion 9.

Claims

1. A stem-like dilator for assisting insertion of a catheter into a vessel, comprising:

a first through-hole pierced over an entire region of the dilator from a distal end face to a rear end face in the longitudinal direction of the dilator;

a second through-hole, which is a different through-hole from the first through-hole, pierced over a region of the dilator from a midway to the rear end face in the longitudinal direction of the dilator; and

a tapered portion formed such that it is tapered toward the distal end face, wherein

the first through-hole and the second through-hole are sized to allow insertion of flexible guidewires for assisting insertion of the catheter.

2. The dilator according to claim 1, wherein one end of the second through-hole located at the midway of the dilator in the longitudinal direction thereof is open on a surface of the tapered portion while the other end of the second through-hole is open on the rear end face.

3. The dilator according to claim 1, wherein when seen from a direction along the axis of the dilator, an opening in the one end of the second through-hole and an opening in the other end of the second through-hole are biased to the same direction with respect to the axis of the dilator.

4. The dilator according to claim 1, wherein the opening in the rear end face of the first through-hole is different from the opening in the rear end face of the second through-hole in at least one of a shape and a size thereof.

5. The dilator according to claim 1, wherein a mark that is observable from outside is indicated on a region including at least one of the rear end face and the proximity to the rear end face, and

a positional relationship between a position of the opening on one end of the second through-hole located at the midway of the dilator in the longitudinal direction thereof and a position indicated by the mark is correlated in advance with the direction about the axis of the dilator.

6. The dilator according to claim 1, wherein a recessed portion is formed by recessing a part of the surface of the dilator excluding the distal end face and the rear end face, and the one end of the second through-hole is open in the recessed portion.

7. The dilator according to claim 6, wherein

the recessed portion is formed as a long groove extending in a direction along the axis of the dilator, and a plurality of recessed portions are formed in the surface of the dilator at a certain interval in a circumferential direction thereof, and

the one end of the second through-hole is open in one of the plurality of recessed portions.