Horn used in an ultrasonic surgical operating instrument

• US 5,042,461 A
• Filed: 05/11/1989
• Issued: 08/27/1991
• Est. Priority Date: 05/17/1988
• Status: Expired due to Fees

• Current Assignee: Sumitomo Bakelite Company Limited
• Original Assignee: Sumitomo Bakelite Company Limited
• Inventors: Noguchi, Yasuo, Inoue, Naohiko
• Primary Examiner(s): Cohen, Lee S.
• Assistant Examiner(s): ZELE, KRISTA MICHELLE
• Application Number:
  US07/350,352
• Time in Patent Office: 838 Days
• Field of Search: 239/102.2, 239/589.1, 239/590, 128/24 A, 128/303.14, 128/305, 128/328, 433/119, 606/45, 606/127, 606/128, 606/167, 606/169, 606/170, 604/22, 604/266, 604/268, 604/902
• US Class Current: 601/4
• CPC Class Codes: A61B 17/22012 in direct contact with, or very close to, the obstruction or concrement for removing obstructions in blood vessels by laser A61B18/245
• CPC Class Codes: A61B 17/320068 using mechanical vibrations, e.g. ultrasonic A61B17/22012 takes precedence; dental tooth drilling devices operated by vibration A61C3/03; removing intra-ocular material using mechanical vibrations A61F9/00745
• CPC Class Codes: A61B 2017/22008 used or promoted
• CPC Class Codes: A61B 2017/22037 Fecal impaction removal
• CPC Class Codes: A61B 2017/32008 preventing clogging of suction channel
• CPC Class Codes: A61B 2017/320084 Irrigation sleeves
• CPC Class Codes: A61B 46/13 the drapes entering the patient's body
• CPC Class Codes: A61M 1/85 with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants for negative pressure wound therapy A61M1/92, A61M1/94; combined with tracheal tubes A61M16/0463; dental instruments with combined rinsing and aspirating A61C17/0208
• CPC Class Codes: A61M 2202/0014 removed from the body
• CPC Class Codes: A61M 2202/068 Faeces; Excretions
• CPC Class Codes: A61M 2210/1067 Anus
• CPC Class Codes: A61M 2230/005 Parameter used as control input for the apparatus

Abstract

A horn used in an ultrasonic surgical operating instrument for crushing and removing organic tissue comprises a horn body vibrated by and ultrasonic vibration source for crushing the organic tissue, a removing passage extending through the horn body, through which the crushed tissue is removed outside, a bulkhead disposed in the removing passage, and at least one through hole formed in the bulkhead. The bulkhead and the hole cooperate with each other to reduce a cross-sectional area of the removing passage.

Claims

1. A horn used in an ultrasonic surgical operating instrument for crushing and removing organic tissue, said horn comprising:

a horn body for crushing said organic tissue which is ultrasonically vibrated;

passage means extending through said horn body, through which the crushed tissue is removed outside;

means provided within said passage means for reducing a cross-sectional dimension of said passage means;

said reducing means comprising a bulkhead disposed in said passage means and aperture means for axially extending through said bulkhead;

wherein said bulkhead is disposed in a midway portion in said passage means.

2. A horn according to claim 1, wherein said aperture means includes at least two through holes.

3. A horn according to claim 2, wherein said holes have circular or elliptical cross-sections.

4. A horn according to claim 2, wherein said holes have polygonal cross-sections.

5. A horn according to claim 2, wherein said holes have poly-edgings cross-sections.