Medical intervention instrument

Patent metadata

Field	Value
Publication number	US-9770229-B2
Application number	US-2843008-A
Country	US
Kind code	B2
Filing date	Feb 8, 2008
Priority date	Aug 11, 2005
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

A grasping forceps 1 includes: a pair of guide sections 7 A and 7 B that guide maneuvering wires 6 A and 6 B in a direction of an axial line C of a sheath; an extending-and-retracting member (transmission section) 8 that transmits displacement information of the maneuvering section to the maneuvering wires 6 A and 6 B and outputs the displacement information to the intervention instrument; a distal direction movement inhibitor section (specific directional movement-inhibitor section) 10 that allows the sheaths of the maneuvering wires 6 A and 6 B toward the distal end; a proximal direction movement inhibitor section (specific directional movement-inhibitor section) 11 that allows the sheaths of the maneuvering wires 6 A and 6 B toward the distal end; and an locked-state-releasing section 12 that releases an engaging state of the guide sections 7 A and 7 B with the distal direction movement inhibitor section 10 or the proximal direction movement inhibitor section 11 based on the displacement input by the maneuvering section. Accordingly, an medical intervention instrument can be provided that can maintain a certain attitude of the intervention instrument once established during intervention even if an external force is applied, and that can carry out identical operations simultaneously, i.e., manipulating of the intervention instrument and releasing of a certain attitude of the intervention instrument.

First claim

What is claimed is:

1. A medical intervention instrument comprising:
a sheath having a distal end and a proximal end and extending in an axial direction;
an intervention instrument disposed to the distal end of the sheath;
a transmission section that makes extending and retracting movements in an axial line direction relative to the sheath;
a maneuvering section, disposed to the proximal end of the sheath, that accepts displacement information input thereinto associated with the transmission section relative to the sheath;
a guide section, fixed in the axial line direction relatively against the sheath, that guides the transmission section in the axial line direction of the sheath;
a distal direction movement inhibitor section that allows the transmission section to move only in a proximal direction from the distal end of the sheath toward the proximal end of the sheath relative to the guide section; and
a proximal direction movement inhibitor section that allows the transmission section to move only in a distal direction from the proximal end of the sheath toward the distal end of the sheath relative to the guide section, wherein
the distal direction movement inhibitor section and the proximal direction movement inhibitor section are disposed in the transmission section,
the distal direction movement inhibitor section is provided with:
a first fixing section that is displaced relative to the guide section and engages the guide section with the transmission section or detaches the guide section from the transmission section; and
a first urging section that urges the first fixing section in a direction that fixes the guide section to the transmission section relatively, and

the proximal direction movement inhibitor section is provided with:
a second fixing section that is displaced relative to the guide section in a direction opposite the first fixing section and engages the guide section with the transmission section or detaches the guide section from the transmission section; and
a second urging section that urges the second fixing section in a direction that fixes the guide section to the transmission section relatively; and

a pair of maneuvering wires configured to move in the sheath in extending and retracting directions along the axial direction of the sheath, wherein:
the transmission section comprises a pair of transmission sections;
the guide section comprises a pair of guide sections;
the distal direction movement inhibitor section comprises a pair of distal direction movement inhibitor sections;
the proximal direction movement inhibitor section comprises a pair of proximal direction movement inhibitor sections;
the first fixing section comprises a rear-locking plate;
the second fixing section comprises a front-locking plate;
the maneuvering section accepts displacement information input thereinto associated with movements of the pair of maneuvering wires relative to the sheath; and
the maneuvering section includes:
a distal section fixed to the proximal end of the sheath;
the pair of transmission sections, each of which is fixed and connected to a proximal end of corresponding one of the pair of maneuvering wires and is configured to perform extending and retracting movements in the axial line direction relative to the sheath, each of the pair of transmission sections including:
a hoop section forming a finger hook section,
a distal end projection section and a proximal end projection section, both of which extend in parallel in directions of tangential lines of the hoop section,
a pair of saddle sections, one of which is formed at a section where the hoop section is connected to the distal end projection section and the other of which is formed at a section where the hoop section is connected to the proximal end projection section, and
a passage section;

the pair of guide sections fixed to the distal section in the axial line direction relatively against the sheath, each of the pair of guide sections being configured to guide corresponding one of the pair of transmission sections in the axial line direction at the passage section of the one corresponding of the pair of transmission sections;
the pair of distal direction movement inhibitor sections, each of which is configured to allow corresponding one of the pair of maneuvering wires to move only toward the proximal end of the sheath relative to corresponding one of the pair of guide sections, each of the pair of distal direction movement inhibitor sections including:
the rear-locking plate configured to be displaced relative to the corresponding one of the pair of guide sections and configured to engage the corresponding one of the pair of guide sections with corresponding one of the pair of transmission sections or detach the corresponding one of the pair of guide sections from the corresponding one of the pair of transmission sections, the rear-locking plate having two ends, one of which has a first groove engaging with the saddle section of the proximal end projection section and the other of which has a first hole section which the corresponding one of the pair of guide sections is inserted in and engaged with, the rear-locking plate being inclinable with respect to a direction orthogonal to the corresponding one of the pair of guide sections in order to be fixed to the corresponding one of the pair of guide sections, and
the first urging section disposed between the rear-locking plate and the passage section of the corresponding one of the pair of transmission sections and configured to urge the rear-locking plate in a direction that fixes the corresponding one of the pair of guide sections to the corresponding one of the pair of transmission sections relatively;

the pair of proximal direction movement inhibitor sections, each of which is configured to allow corresponding one of the pair of maneuvering wires to move only toward the distal end of the sheath relative to corresponding one of the pair of guide sections, each of the pair of proximal direction movement inhibitor sections including:
the front-locking plate configured to be displaced relative to the corresponding one of the pair of guide sections in a direction opposite the corresponding rear-locking plate and configured to engage the corresponding one of the pair of guide sections with corresponding one of the pair of transmission sections or detach the corresponding one of the pair of guide sections from the corresponding one of the pair of transmission sections, the front-locking plate having two ends, one of which has a second groove engaging with the saddle section of the distal end projection section and the other of which has a second hole section which the corresponding one of the pair of guide sections is inserted in and engaged with, the front-locking plate being inclinable with respect to a direction orthogonal to the corresponding one of the pair of guide sections in order to be fixed to the corresponding one of the pair of guide sections, the front-locking plate and the corresponding rear-locking plate being inclinable in opposite directions, and
the second urging section disposed between the front-locking plate and the passage section of the corresponding one of the pair of transmission sections and configured to urge the front-locking plate in a direction that fixes the corresponding one of the pair of guide sections to the corresponding one of the pair of transmission sections relatively; and

a pair of locked-state releasing sections, each of which includes:
a rear-locking-plate holder section configured to press and displace the corresponding rear-locking plate in a direction of releasing a fixed state between the corresponding rear-locking plate and corresponding one of the pair of guide sections, and
a front-locking-plate holder section configured to press and displace the corresponding front-locking plate in a

Assignees

• Hashimoto Tatsutoshi
• Olympus Corp

Inventors

• Hashimoto Tatsutoshi

Classifications

• A61B90/03

  Automatic limiting or abutting means, e.g. for safety · CPC title

• A61B2017/2939

  Details of linkages or pivot points · CPC title

• A61B2017/2946

  Locking means · CPC title

• A61B10/06 Primary

  Biopsy forceps {, e.g. with cup-shaped jaws} · CPC title

• A61B2017/2912

  transmission of forces to actuating rod or piston · CPC title