Hemostatic device

Patent metadata

Field	Value
Publication number	US-2016338709-A1
Application number	US-201615229455-A
Country	US
Kind code	A1
Filing date	Aug 5, 2016
Priority date	Jul 15, 2002
Publication date	Nov 24, 2016
Grant date	—

Abstract

A hemostatic device includes a flexible band adapted to be wrapped around a patient's limb at a site on the limb where bleeding is to be stopped, a portion for securing the band in a wrapped state to the limb, a curved plate which is made of a material more rigid than the band and at least a portion of which is curved toward the inner peripheral side thereof, a main balloon which is provided on the inner peripheral side of the curved plate and which inflates when a fluid is introduced therein, and a pressing member which is provided between the curved plate and the main balloon so that at least a portion thereof overlaps with the balloon and which is adapted for pressing against the balloon. The device provides an excellent hemostatic effect and prevents numbness and poor circulation in areas peripheral to the site of attachment.

First claim

What is claimed is:

1 . A hemostatic device comprising:
a flexible band configured to be wrapped around a wrist of a patient at a site where bleeding is to be stopped so that the flexible band is in a wrapped state on the patient's wrist; a fastener to secure the flexible band in the wrapped state around the patient's wrist; a curved plate possessing an inner surface and an outer surface, the curved plate defining a concave curve along the inner surface; a balloon positionable between the curved plate and the patient's wrist in the wrapped state of the flexible band, the balloon including a center, the balloon being inflatable upon introducing gas into the balloon when the flexible band is in the wrapped state with the balloon positioned between the patient's wrist and the plate to apply a compressive force to the site where bleeding is to be stopped; a marker located to position the center of the balloon at the site where bleeding is to be stopped; the band, the balloon and the curved plate being fabricated from substantially transparent materials permitting visualization of the site where bleeding is to be stopped when the flexible band is in the wrapped state with the balloon positioned between the patient's wrist and the curved plate; and the balloon being made of a gas permeable material selected so that after the balloon is inflated by the gas, the gas in the balloon is gradually released through the gas permeable material to outside the balloon to gradually decrease the compressive force applied to the site where bleeding is to be stopped.

2 . The hemostatic device according to claim 1 , wherein the gas permeable material from which the balloon is fabricated is a gas permeable material that allows release of the gas through the gas permeable material to the outside of the balloon so that an internal pressure in the balloon 60 minutes after inflation of the balloon to an initial internal pressure is equal to or less than 70% of the initial internal pressure and is equal to or greater than 20% of the initial internal pressure, the initial internal pressure being the internal pressure in the balloon ten seconds after the balloon is inflated to a degree sufficient to produce a compressive force to stop bleeding.

3 . The hemostatic device according to claim 1 , wherein the gas permeable material from which the balloon is fabricated is a gas permeable material that allows release of the gas through the gas permeable material to the outside of the balloon so that an internal pressure in the balloon 60 minutes after inflation of the balloon to an initial internal pressure is less than the initial internal pressure and is equal to or greater than 20% of the initial internal pressure, the initial internal pressure being the internal pressure in the balloon ten seconds after the balloon is inflated to a degree sufficient to produce a compressive force to stop bleeding.

4 . The hemostatic device according to claim 1 , wherein the balloon is a first balloon, further comprising a second balloon positionable between the curved plate and the patient's wrist in the wrapped state of the flexible band.

5 . The hemostatic device according to claim 1 , wherein the second balloon is inflatable to an initial internal pressure is a different size than the first balloon positionable between the curved plate and the first balloon in the wrapped state of the flexible band.

6 . The hemostatic device according to claim 1 , further comprising a connector connecting the balloon to the flexible band.

7 . A hemostatic device comprising:
a band made of flexible material allowing the band to be wrapped around a wrist of a patient at a site where bleeding is to be stopped so that the band is in a wrapped state on the patient's wrist; a fastener to secure the flexible band in the wrapped state around the patient's wrist; a plate possessing an inner surface and an outer surface, at least a portion of the plate being curved so that the plate includes a curved plate portion, the curved plate portion defining a concave curve along the inner surface of the plate that faces toward the patient when the band is in the wrapped state; a balloon positionable between the plate and the patient's wrist when the band is in the wrapped state, the balloon being inflatable upon introducing gas into the balloon when the band is in the wrapped state with the balloon positioned between the patient's wrist and the plate to apply a compressive force to the site where bleeding is to be stopped; the band, the balloon and at least a part of the plate being substantially transparent to permit visualization through the band, the plate and the balloon of the site where bleeding is to be stopped when the band is in the wrapped state with the balloon positioned between the patient's wrist and the plate; and the balloon being made of a material which is permeable to the gas in the balloon after the gas is introduced into the balloon to inflate the balloon and which is selected so that the gas in the balloon is gradually released through the gas permeable material to outside the balloon to gradually decrease the compressive force applied to the site where bleeding is to be stopped.

8 . The hemostatic device according to claim 7 , wherein the material from which the balloon is fabricated is a gas permeable material that allows release of the gas through the gas permeable material to the outside of the balloon so that an internal pressure in the balloon 60 minutes after inflation of the balloon to an initial internal pressure is equal to or less than 70% of the initial internal pressure and is equal to or greater than 20% of the initial internal pressure, the initial internal pressure being the internal pressure in the balloon ten seconds after the balloon is inflated to a degree sufficient to produce a compressive force to stop bleeding.

9 . The hemostatic device according to claim 7 , wherein the material from which the balloon is fabricated is a gas permeable material that allows release of the gas through the gas permeable material to the outside of the balloon so that an internal pressure in the balloon 60 minutes after inflation of the balloon to an initial internal pressure is less than the initial internal pressure and is equal to or greater than 20% of the initial internal pressure, the initial internal pressure being the internal pressure in the balloon ten seconds after the balloon is inflated to a degree sufficient to produce a compressive force to stop bleeding.

10 . The hemostatic device according to claim 7 , further comprising a marker on the balloon to facilitate positioning of the balloon at the site where bleeding is to be stopped.

11 . The hemostatic device according to claim 11 , further comprising a marker on the band to facilitate positioning of the balloon at the site where bleeding is to be stopped.

12 . The hemostatic device according to claim 7 , further comprising a marker on the plate balloon to facilitate positioning of the balloon at the site where bleeding is to be stopped.

13 . The hemostatic device according to claim 7 , wherein the balloon is a first balloon, and further comprising a second balloon positionable between the plate and the patient's wrist when the band is in the wrapped state.

14 . The hemostatic device according to claim 7 , wherein the second balloon is inflatable and is smaller in size than the first balloon when initially inflated for use.

15 . The hemostatic device according to claim 7 , further comprising a connector connecting the balloon to the flexible band.

16 . A method to

Assignees

• Terumo Corp

Inventors

• Wada Satoshi
• Numata Shigeki
• Yagi Hiroshi

Classifications

• A61B17/135 Primary

  inflatable · CPC title

• A61B17/1325

  with means for applying local pressure (pressure pads A61F5/30) · CPC title

• A61B2090/3937

  Visible markers · CPC title

• A61B2017/12004

  for haemostasis, for prevention of bleeding · CPC title

• A61B2017/00907

  for light · CPC title