US5817097A — Bone saw blade guide with magnet

Claim 1

Independent Claim 139 words

A surgical cutting guide for use with a surgical instrument having a known width and formed of magnetic material comprising a guide body having a connector on one surface thereof for detachably connecting the guide body to a bone having a bone portion to be cut, said guide body further including a separate guiding surface having a length which is at least substantially equal in length to the bone portion to be cut and a magnet forming part of said separate guiding surface having a dimension at least equal to the known width and positioned to be substantially in alignment with the bone portion to be cut and to magnetically attract and exert an attractive force on the surgical instrument in a direction towards the guide body for attracting the surgical instrument to and slideably against the guiding surface.

Claim 2

Dependent Claim 139 words

A surgical cutting guide for use with a surgical instrument having a known width and formed of magnetic material comprising a guide body having a connector on one surface thereof for detachably connecting the guide body to a bone having a bone portion to be cut, said guide body further including a separate guiding surface having a length which is at least substantially equal in length to the bone portion to be cut and a magnet forming part of said separate guiding surface having a dimension at least equal to the known width and positioned to be substantially in alignment with the bone portion to be cut and to magnetically attract and exert an attractive force on the surgical instrument in a direction towards the guide body for attracting the surgical instrument to and slideably against the guiding surface.

Claim 3

Dependent Claim 21 words

The surgical cutting guide of claim 1, wherein the guide body comprises coated steel, stainless steel, aluminum, plastic, titanium or cobalt-chrome.

Claim 4

Dependent Claim 22 words

The surgical cutting guide of claim 1, wherein the magnet is selected from the group consisting of alnicos, ceramics and rare earths.

Claim 5

Dependent Claim 20 words

The surgical cutting guide of claim 1, wherein the magnet is selected from the group consisting of samarium-cobalt and neodymium-iron-boron.

Claim 6

Dependent Claim 30 words

The surgical cutting guide of claim 1, wherein the magnet comprises material having a Maximum energy Product (BHmax) of between about 0.5 Megagauss Oersteds and about 45 Megagauss Oersteds (MGO).

Claim 7

Dependent Claim 40 words

The surgical cutting guide of claim 1, wherein the magnet is completely embedded in the guide body and is enclosed by a cover formed of a material which minimally reduces magnetic flux exerted by the magnet on the surgical instrument.

Claim 8

Dependent Claim 15 words

The surgical cutting guide of claim 1, wherein the magnet is a plurality of magnets.

Claim 9

Dependent Claim 24 words

The surgical cutting guide of claim 1, wherein the magnet exerts the attractive force in a direction substantially normal to the blade guiding surface.

Claim 10

Dependent Claim 16 words

The surgical cutting guide of claim 1, wherein the magnet is removable from the guide body.

Claim 11

Dependent Claim 16 words

The surgical cutting guide of claim 1, wherein the guide body further comprises a magnet cover.

Claim 12

Dependent Claim 24 words

The surgical cutting guide of claim 10, wherein the cover is selected from the group consisting of coated steel, stainless steel, aluminum and plastic.

Claim 13

Dependent Claim 37 words

The surgical cutting guide of claim 1, wherein said connector comprises at least one bone connector coupled to the guide body for reversibly attaching the guide body to said bone having a bone portion to be cut.

Claim 14

Dependent Claim 18 words

The surgical cutting guide of claim 12, wherein the at least one bone connector is a bone pin.

Claim 15

Dependent Claim 27 words

The surgical cutting guide of claim 1, wherein the separate guiding surface is selected from the group consisting of coated steel, stainless steel, titanium, aluminum and plastic.

Claim 16

Dependent Claim 25 words

The surgical cutting guide of claim 1, wherein the guide body is configured to cut a femur for implanting a unit of a prosthetic knee.

Claim 17

Dependent Claim 25 words

The surgical cutting guide of claim 1, wherein the guide body is configured to cut a tibia for implanting a unit of a prosthetic knee.

Claim 18

Dependent Claim 31 words

A surgical saw blade guide kit comprising the surgical cutting guide of claim 1 and a plurality of magnets, wherein each magnet is configured to removably fit within the guide body.

Claim 19

Dependent Claim 148 words

A surgical cutting guide for use with a surgical instrument having a known width and formed of a magnetic material comprising a guide body having a separate guiding surface thereon having a length which is at least substantially equal in length to a bone portion of a bone to be cut, said guide body further having at least one bone connector coupled to the guide body on a surface other than the guiding surface for reversibly attaching the guide body to said bone having a bone portion to be cut, said guide body containing in the guiding surface a magnet having a dimension at least equal to the known width and substantially in alignment with the bone portion to be cut and wherein said magnet exerts an attractive force in a direction towards the guide body for attracting the surgical instrument to and slideably against the guiding surface.

Claim 20

Dependent Claim 148 words

A surgical cutting guide for use with a surgical instrument having a known width and formed of a magnetic material comprising a guide body having a separate guiding surface thereon having a length which is at least substantially equal in length to a bone portion of a bone to be cut, said guide body further having at least one bone connector coupled to the guide body on a surface other than the guiding surface for reversibly attaching the guide body to said bone having a bone portion to be cut, said guide body containing in the guiding surface a magnet having a dimension at least equal to the known width and substantially in alignment with the bone portion to be cut and wherein said magnet exerts an attractive force in a direction towards the guide body for attracting the surgical instrument to and slideably against the guiding surface.

Claim 21

Independent Claim 168 words

A method of cutting a bone comprising the steps of a) detachably connecting with a connector a surgical cutting guide to a bone having a bone portion to be cut wherein the surgical cutting guide comprises a guide body having a separate guiding surface having a length which is at least substantially equal in length to the bone portion to be cut; b) magnetically attracting a surgical instrument having a known width and formed of a magnetic material to the surgical guide wherein the guiding surface contains a magnet therein having a dimension at least equal to the known width and positioned to be in alignment with the bone portion to be cut, the magnet exerting an attractive force on the surgical instrument in a direction towards the guide body and slideably against the guiding surface; c) advancing the surgical instrument into the bone having a portion to be cut, thereby cutting the bone portion to be cut; and d) removing the surgical instrument from the guiding surface.

Claim 22

Independent Claim 168 words

A method of cutting a bone comprising the steps of a) detachably connecting with a connector a surgical cutting guide to a bone having a bone portion to be cut wherein the surgical cutting guide comprises a guide body having a separate guiding surface having a length which is at least substantially equal in length to the bone portion to be cut; b) magnetically attracting a surgical instrument having a known width and formed of a magnetic material to the surgical guide wherein the guiding surface contains a magnet therein having a dimension at least equal to the known width and positioned to be in alignment with the bone portion to be cut, the magnet exerting an attractive force on the surgical instrument in a direction towards the guide body and slideably against the guiding surface; c) advancing the surgical instrument into the bone having a portion to be cut, thereby cutting the bone portion to be cut; and d) removing the surgical instrument from the guiding surface.

Claim 23

Dependent Claim 29 words

The method of claim 19, comprising the additional step of detaching the surgical cutting guide from the bone having a portion to be cut upon completion of cutting thereof.

Claim 24

Dependent Claim 46 words

The method of claim 19, wherein the step of detachably connecting the connector to a bone having a portion to be cut includes a bone which is selected from the group consisting of the scapula, humerus, ulna, radius, pelvis, femur, tibia, fibula, patella, talus and calcaneus.

Claim 25

Independent Claim 206 words

A method of cutting a bone comprising the steps of: a) reversibly attaching with a connector a surgical cutting guide to the bone having a portion to be cut, wherein the surgical cutting guide comprises a guide body having a separate guiding surface thereon having a length which is at least substantially equal in length said bone having a portion to be cut and wherein the connector is used for reversibly attaching the guide body to the bone having a portion to be cut, the guide body containing a magnet which exerts an attractive force on a surgical instrument having formed of a magnetic material and wherein said magnet has a dimension at least equal to the known width and positioned to be in alignment with the bone portion to be cut, said magnet exerting said attractive force in a direction towards the guiding surface for attracting the surgical instrument to and slideably against the guiding surface; b) placing the surgical instrument against the guiding surface such that the surgical instrument is attracted to the guiding surface by the magnet; c) advancing the surgical instrument into the bone portion to be cut, thereby cutting the bone; and d) removing the surgical instrument from the guiding surface.

Claim 26

Independent Claim 206 words

A method of cutting a bone comprising the steps of: a) reversibly attaching with a connector a surgical cutting guide to the bone having a portion to be cut, wherein the surgical cutting guide comprises a guide body having a separate guiding surface thereon having a length which is at least substantially equal in length said bone having a portion to be cut and wherein the connector is used for reversibly attaching the guide body to the bone having a portion to be cut, the guide body containing a magnet which exerts an attractive force on a surgical instrument having formed of a magnetic material and wherein said magnet has a dimension at least equal to the known width and positioned to be in alignment with the bone portion to be cut, said magnet exerting said attractive force in a direction towards the guiding surface for attracting the surgical instrument to and slideably against the guiding surface; b) placing the surgical instrument against the guiding surface such that the surgical instrument is attracted to the guiding surface by the magnet; c) advancing the surgical instrument into the bone portion to be cut, thereby cutting the bone; and d) removing the surgical instrument from the guiding surface.

Claim 27

Dependent Claim 22 words

The method of claim 22, comprising the additional step of actuating a bone saw coupled to the surgical instrument before step b).

Claim 28

Dependent Claim 38 words

The method of claim 22, wherein the step of reversibly connecting to a bone includes a bone which is selected from the group consisting of the scapula, humerus, ulna, radius, pelvis, femur, tibia, fibula, patella, talus and calcaneus.

Claim 29

Dependent Claim 96 words

A method of cutting a bone comprising the steps of: a) providing the surgical cutting guide of claim 1; b) reversibly attaching with a connector the surgical cutting guide to the bone having a portion to be cut; c) placing the surgical instrument having a magnetic material against the guide surface such that the surgical instrument is attracted to and slideably against the guiding surface by the magnet; d) advancing the surgical instrument into the bone, thereby cutting the portion of the bone to be cut; and e) removing the surgical instrument from the guiding surface.

Claim 30

Dependent Claim 44 words

The method of claim 25, wherein the step of reversibly attaching to a bone having a portion to be cut includes a bone which is selected from the group consisting of the scapula, humerus, ulna, radius, pelvis, femur, tibia, fibula, patella, talus and calcaneus.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2001-10-05	2002-04-06	2002-10-06	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2005-10-05	2006-04-06	2006-10-06	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2009-10-05	2010-04-06	2010-10-06	$7700.00	Window Closed / Lapsed

Bone saw blade guide with magnet

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