Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2650588 A
Publication typeGrant
Publication dateSep 1, 1953
Filing dateFeb 7, 1951
Priority dateDec 29, 1950
Publication numberUS 2650588 A, US 2650588A, US-A-2650588, US2650588 A, US2650588A
InventorsDrew Harry Guy Radcliffe
Original AssigneeDrew Harry Guy Radcliffe
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Artificial femoral head having an x-ray marker
US 2650588 A
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

p 1, 1953 v H. G. R. DREW 2,650,588

ARTIFICIAL FEMORAL HEAD HAVING AN X-RAY MARKER 7 Filed Feb. 7, 1951 m vs, rim

H. 6-. R. DRE.

Patented Sept. l,

UNITED STATES ii' ATENT OFFICE ARTIFICIAL FEMORAL HEAD HAVING AN X-RAY MARKER Harry Guy Radcliffe Drew, Thornton Heath, England 3 Claims.

This invention relates to an artificial femoral head to replace the head of the femur, which has been cut away owing to disease.

Artificial femoral heads of this kind are known which comprise a ball portion which replaces the head of the femur, and a stem portion which is placed firmly in position in the femur, which has previously been hollowed, so as to secure the ball portion in the position normally occupied by the head of the femur.

An object of the present invention is to provide in an artificial femoral head of the above kind X-ray contrast indicator means which enable an X-ray photograph to show whether or not the artificial femoral head has shifted from its original position after being in use for a period of time.

According to the present invention, the artificial femoral head comprises a ball portion ti replace the head of the femur and a stem portion for insertion 1ongitudinally within the femur, the ball and stem portions being made of a hard transparent artificial plastic material, and X-ray contrast indicator means within the ball portion comprising at least one indicator element located laterally remote from the longitudinal axis of the ball portion.

The hard transparent artificial plastic material of which the ball and stem portions are made is preferably polymerized methyl methacrylate, for example, the artificial resin solder under the registered trade-mark Perspex.

The stem is made hollow, and a metal pin is firmly inserted in it. This pin serves a dual purpose, namely to give strength to the stem, and to provide a visual image on an X-ray photograph.

The exterior of the stem is fluted or grooved to prevent rotation.

One form of construction of the invention is illustrated in the annexed drawings, in which,

Fig. 1 is a perspective view of the device as a whole,

Fig. 2 is an elevation of the stem,

Fig. 3 is a perspective view of the ball, and

Fig. 4 is a perspective view of the indicator.

In these drawings a is the ball, which is formed from a solid block of polymerized methyl methacrylate, and is bowl-shaped. A hollow stem b is also formed from a solid block of perspex, one end of this stem being embedded in the cap by means of a dough of polymerized methyl methacrylate. A metal pin is inserted in the stem 12, and is held rigidly in place by means of a cement of polymerized methyl methacrylate in the form of dough. The exterior of the stem b is provided with a number of flutings e or shaped for the purpose as previously explained.

The indicator mentioned is in the form of a wire frame I of umbrella-like shape, some of the radiating wires being longer than the others as can be seen from the drawings. This frame is welded into the cap by means of a dough of polymerized methyl methacrylate. If an X-ray photograph is taken when the device is placed in position in the human hip, and should a further photograph be taken at a later date, any shifting of position of the device would be indicated by the positions of the wires of the frame.

In an alternative method the frame could be moulded in position.

The indicator is not necessarily of the form described, but might have any one of various other forms. It might, for example, be in the form of a strip of metal gauze.

I claim:

1. An artificial femoral head, which comprises a ball portion to replace the head of the femur and a stem portion for insertion longitudinally within the femur, the ball and stem portions being made of a hard transparent artificial plastic material, and X-ray contrast indicator means within the ball portion comprising at least one indicator element located laterally remote from the longitudinal axis of the ball portion.

2. An artificial femoral head, which comprises a ball portion to replace the head of the femur and a stem portion for insertion longitudinally within the femur, the ball and stem portions being made of a hard transparent artificial plastic material, and an X-ray contrast indicator device within the ball portion comprising at least one projecting element extending radially outwards from the longitudinal axis of the ball portion and downwards towards the stem portion.

3. An artificial femoral head, which comprises a ball portion to replace the head of the femur and a stem portion for insertion longitudinally within the femur, the ball and stem portions being made of a hard transparent artificial plastic material, and a frame within the ball portion consisting of X-ray contrast material and having a plurality of arms extending radially outwards from the longitudinal axis of the ball portion and downwards towards the stem portion, at least one of the said arms having a length different from that of at least one of the other arms.

HARRY GUY RADCLIFFE DREW.

References Cited in the file of this patent The Journal of Bone and Joint Surgery for May 1950, vol. 32B, No. 2, p 167. (Copy in Scientific Library.)

La Presse Medicale for May 3, 1947, pg. 302. (Copy in Div. 55.)

The Journal of Bone and Joint Surgery for Nov. 1950, vol. 32B, No. 4, advertising pg. 24. (Copy in Scientific Library.)

Non-Patent Citations
Reference
1 *None
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3698017 *Jul 29, 1970Oct 17, 1972Nat Res DevProsthetic acetabular devices
US4168586 *Feb 24, 1977Sep 25, 1979Samis Philip LIdentification method and structure
US4803976 *Apr 8, 1988Feb 14, 1989SynthesSighting instrument
US6118845 *Jun 29, 1998Sep 12, 2000Surgical Navigation Technologies, Inc.System and methods for the reduction and elimination of image artifacts in the calibration of X-ray imagers
US6235038Oct 28, 1999May 22, 2001Medtronic Surgical Navigation TechnologiesSystem for translation of electromagnetic and optical localization systems
US6273915 *Aug 13, 1997Aug 14, 2001James B. GrimesFemoral head-neck prosthesis and method of implantation
US6370224Jun 12, 2000Apr 9, 2002Sofamor Danek Group, Inc.System and methods for the reduction and elimination of image artifacts in the calibration of x-ray imagers
US6381485Oct 28, 1999Apr 30, 2002Surgical Navigation Technologies, Inc.Registration of human anatomy integrated for electromagnetic localization
US6402762Mar 13, 2001Jun 11, 2002Surgical Navigation Technologies, Inc.System for translation of electromagnetic and optical localization systems
US6470207Mar 23, 1999Oct 22, 2002Surgical Navigation Technologies, Inc.Navigational guidance via computer-assisted fluoroscopic imaging
US6477400Aug 16, 1999Nov 5, 2002Sofamor Danek Holdings, Inc.Fluoroscopic image guided orthopaedic surgery system with intraoperative registration
US6499488Oct 28, 1999Dec 31, 2002Winchester Development AssociatesSurgical sensor
US6725080Mar 1, 2001Apr 20, 2004Surgical Navigation Technologies, Inc.Multiple cannula image guided tool for image guided procedures
US6740120Feb 19, 1999May 25, 2004James B. GrimesBone prosthesis and method of Access
US6783553Oct 24, 2001Aug 31, 2004James B. GrimesProsthesis
US6892090Aug 19, 2002May 10, 2005Surgical Navigation Technologies, Inc.Method and apparatus for virtual endoscopy
US6920347Jun 21, 2002Jul 19, 2005Surgical Navigation Technologies, Inc.Trajectory storage apparatus and method for surgical navigation systems
US6947786Feb 28, 2002Sep 20, 2005Surgical Navigation Technologies, Inc.Method and apparatus for perspective inversion
US6968224Sep 19, 2003Nov 22, 2005Surgical Navigation Technologies, Inc.Method of detecting organ matter shift in a patient
US6990368Apr 4, 2002Jan 24, 2006Surgical Navigation Technologies, Inc.Method and apparatus for virtual digital subtraction angiography
US7007699Nov 7, 2002Mar 7, 2006Surgical Navigation Technologies, Inc.Surgical sensor
US7085400Jun 14, 2000Aug 1, 2006Surgical Navigation Technologies, Inc.System and method for image based sensor calibration
US7130676Aug 29, 2002Oct 31, 2006Sofamor Danek Holdings, Inc.Fluoroscopic image guided orthopaedic surgery system with intraoperative registration
US7174202Dec 17, 2002Feb 6, 2007British TelecommunicationsMedical navigation apparatus
US7217276Oct 15, 2002May 15, 2007Surgical Navigational Technologies, Inc.Instrument guidance method and system for image guided surgery
US7313430Aug 28, 2003Dec 25, 2007Medtronic Navigation, Inc.Method and apparatus for performing stereotactic surgery
US7366562Oct 17, 2003Apr 29, 2008Medtronic Navigation, Inc.Method and apparatus for surgical navigation
US7542791Mar 5, 2004Jun 2, 2009Medtronic Navigation, Inc.Method and apparatus for preplanning a surgical procedure
US7567834May 3, 2004Jul 28, 2009Medtronic Navigation, Inc.Method and apparatus for implantation between two vertebral bodies
US7570791Aug 20, 2003Aug 4, 2009Medtronic Navigation, Inc.Method and apparatus for performing 2D to 3D registration
US7599730Nov 19, 2002Oct 6, 2009Medtronic Navigation, Inc.Navigation system for cardiac therapies
US7606613Sep 5, 2002Oct 20, 2009Medtronic Navigation, Inc.Navigational guidance via computer-assisted fluoroscopic imaging
US7630753Jul 25, 2005Dec 8, 2009Medtronic Navigation, Inc.Method and apparatus for perspective inversion
US7636595Oct 28, 2004Dec 22, 2009Medtronic Navigation, Inc.Method and apparatus for calibrating non-linear instruments
US7641660Mar 8, 2004Jan 5, 2010Biomet Manufacturing CorporationMethod, apparatus, and system for image guided bone cutting
US7643867Oct 17, 2003Jan 5, 2010Medtronic, Inc.Fiducial marker devices, tools, and methods
US7657300Mar 21, 2002Feb 2, 2010Medtronic Navigation, Inc.Registration of human anatomy integrated for electromagnetic localization
US7660623Jan 30, 2003Feb 9, 2010Medtronic Navigation, Inc.Six degree of freedom alignment display for medical procedures
US7697972Jul 14, 2003Apr 13, 2010Medtronic Navigation, Inc.Navigation system for cardiac therapies
US7720522Feb 25, 2003May 18, 2010Medtronic, Inc.Fiducial marker devices, tools, and methods
US7751865Sep 15, 2004Jul 6, 2010Medtronic Navigation, Inc.Method and apparatus for surgical navigation
US7763035Sep 13, 2004Jul 27, 2010Medtronic Navigation, Inc.Image guided spinal surgery guide, system and method for use thereof
US7787934Jun 4, 2003Aug 31, 2010Medtronic, Inc.Fiducial marker devices, tools, and methods
US7797032Sep 23, 2002Sep 14, 2010Medtronic Navigation, Inc.Method and system for navigating a catheter probe in the presence of field-influencing objects
US7818044Mar 25, 2008Oct 19, 2010Medtronic Navigation, Inc.Method and apparatus for surgical navigation
US7831082Jun 5, 2006Nov 9, 2010Medtronic Navigation, Inc.System and method for image based sensor calibration
US7835778Oct 16, 2003Nov 16, 2010Medtronic Navigation, Inc.Method and apparatus for surgical navigation of a multiple piece construct for implantation
US7835784Sep 21, 2005Nov 16, 2010Medtronic Navigation, Inc.Method and apparatus for positioning a reference frame
US7840253Sep 30, 2005Nov 23, 2010Medtronic Navigation, Inc.Method and apparatus for surgical navigation
US7853305May 13, 2005Dec 14, 2010Medtronic Navigation, Inc.Trajectory storage apparatus and method for surgical navigation systems
US7881770Mar 16, 2004Feb 1, 2011Medtronic Navigation, Inc.Multiple cannula image guided tool for image guided procedures
US7925328Dec 17, 2007Apr 12, 2011Medtronic Navigation, Inc.Method and apparatus for performing stereotactic surgery
US7953471Jul 27, 2009May 31, 2011Medtronic Navigation, Inc.Method and apparatus for implantation between two vertebral bodies
US7971341Mar 25, 2008Jul 5, 2011Medtronic Navigation, Inc.Method of forming an electromagnetic sensing coil in a medical instrument for a surgical navigation system
US7974677May 28, 2009Jul 5, 2011Medtronic Navigation, Inc.Method and apparatus for preplanning a surgical procedure
US7996064Oct 19, 2009Aug 9, 2011Medtronic Navigation, Inc.System and method for placing and determining an appropriately sized surgical implant
US7998062Jun 19, 2007Aug 16, 2011Superdimension, Ltd.Endoscope structures and techniques for navigating to a target in branched structure
US8032204Nov 16, 2009Oct 4, 2011Medtronic, Inc.Fiducial marker devices, tools, and methods
US8046052Mar 24, 2010Oct 25, 2011Medtronic Navigation, Inc.Navigation system for cardiac therapies
US8057407Oct 11, 2005Nov 15, 2011Medtronic Navigation, Inc.Surgical sensor
US8060185Oct 5, 2009Nov 15, 2011Medtronic Navigation, Inc.Navigation system for cardiac therapies
US8073530Mar 29, 2010Dec 6, 2011Medtronic, Inc.Fiducial marker devices, tools, and methods
US8074662Jul 31, 2006Dec 13, 2011Medtronic Navigation, Inc.Surgical communication and power system
US8105339Jul 21, 2010Jan 31, 2012Sofamor Danek Holdings, Inc.Image guided spinal surgery guide system and method for use thereof
US8112292Apr 21, 2006Feb 7, 2012Medtronic Navigation, Inc.Method and apparatus for optimizing a therapy
US8152855Sep 17, 2010Apr 10, 2012Howmedica Osteonics Corp.Method and apparatus for hip femoral resurfacing tooling
US8165658Sep 26, 2008Apr 24, 2012Medtronic, Inc.Method and apparatus for positioning a guide relative to a base
US8175681Dec 16, 2008May 8, 2012Medtronic Navigation Inc.Combination of electromagnetic and electropotential localization
US8185184Mar 21, 2007May 22, 2012Medtronic, Inc.Fiducial marker devices, tools, and methods
US8200314Jan 22, 2007Jun 12, 2012British Telecommunications Public Limited CompanySurgical navigation
US8239001Jul 11, 2005Aug 7, 2012Medtronic Navigation, Inc.Method and apparatus for surgical navigation
US8271069Jul 1, 2010Sep 18, 2012Medtronic Navigation, Inc.Method and apparatus for surgical navigation
US8290572Sep 13, 2010Oct 16, 2012Medtronic Navigation, Inc.Method and system for navigating a catheter probe in the presence of field-influencing objects
US8320653Nov 8, 2010Nov 27, 2012Medtronic Navigation, Inc.System and method for image based sensor calibration
US8359730Jul 1, 2011Jan 29, 2013Medtronic Navigation, Inc.Method of forming an electromagnetic sensing coil in a medical instrument
US8401616Sep 23, 2011Mar 19, 2013Medtronic Navigation, Inc.Navigation system for cardiac therapies
US8452068Nov 2, 2011May 28, 2013Covidien LpHybrid registration method
US8467589Nov 2, 2011Jun 18, 2013Covidien LpHybrid registration method
US8467851Nov 15, 2010Jun 18, 2013Medtronic Navigation, Inc.Method and apparatus for positioning a reference frame
US8467853Nov 14, 2011Jun 18, 2013Medtronic Navigation, Inc.Navigation system for cardiac therapies
US8473026Nov 21, 2006Jun 25, 2013Ge Medical Systems Global Technology CompanySystem for monitoring a position of a medical instrument with respect to a patient's body
US8473032Jun 2, 2009Jun 25, 2013Superdimension, Ltd.Feature-based registration method
US8494613Jul 27, 2010Jul 23, 2013Medtronic, Inc.Combination localization system
US8494614Jul 27, 2010Jul 23, 2013Regents Of The University Of MinnesotaCombination localization system
US8548565Feb 1, 2010Oct 1, 2013Medtronic Navigation, Inc.Registration of human anatomy integrated for electromagnetic localization
US8549732Jul 1, 2011Oct 8, 2013Medtronic Navigation, Inc.Method of forming an electromagnetic sensing coil in a medical instrument
US8611984Apr 6, 2010Dec 17, 2013Covidien LpLocatable catheter
US8634897Dec 13, 2010Jan 21, 2014Medtronic Navigation, Inc.Trajectory storage apparatus and method for surgical navigation systems
US8644907Apr 29, 2010Feb 4, 2014Medtronic Navigaton, Inc.Method and apparatus for surgical navigation
US8660635Mar 8, 2007Feb 25, 2014Medtronic, Inc.Method and apparatus for optimizing a computer assisted surgical procedure
US8663088Dec 2, 2009Mar 4, 2014Covidien LpSystem of accessories for use with bronchoscopes
US8696548Jun 9, 2011Apr 15, 2014Covidien LpEndoscope structures and techniques for navigating to a target in branched structure
US8696685Mar 12, 2010Apr 15, 2014Covidien LpEndoscope structures and techniques for navigating to a target in branched structure
US8706185Nov 15, 2010Apr 22, 2014Medtronic Navigation, Inc.Method and apparatus for surgical navigation of a multiple piece construct for implantation
US8731641May 7, 2012May 20, 2014Medtronic Navigation, Inc.Combination of electromagnetic and electropotential localization
US8764725Nov 14, 2008Jul 1, 2014Covidien LpDirectional anchoring mechanism, method and applications thereof
US8764844 *Oct 22, 2008Jul 1, 2014T.J. Smith & Nephew, LimitedJoint prosthesis
US8768437Oct 25, 2006Jul 1, 2014Sofamor Danek Holdings, Inc.Fluoroscopic image guided surgery system with intraoperative registration
US8838199Feb 14, 2005Sep 16, 2014Medtronic Navigation, Inc.Method and apparatus for virtual digital subtraction angiography
US20100298949 *Oct 22, 2008Nov 25, 2010Smith & Nephew, Inc.Joint prosthesis
USRE30594 *Jun 7, 1979Apr 28, 1981 Positive identification method and structure
USRE40852Jan 24, 2000Jul 14, 2009Medtronic Navigation, Inc.Method and system for navigating a catheter probe
USRE41066Jan 14, 1999Dec 29, 2009Metronic Navigation, Inc.Method and system for navigating a catheter probe
USRE42194Jun 12, 2006Mar 1, 2011Medtronic Navigation, Inc.Percutaneous registration apparatus and method for use in computer-assisted surgical navigation
USRE42226Jun 12, 2006Mar 15, 2011Medtronic Navigation, Inc.Percutaneous registration apparatus and method for use in computer-assisted surgical navigation
USRE43328Jan 31, 2002Apr 24, 2012Medtronic Navigation, IncImage guided awl/tap/screwdriver
USRE43750Jul 13, 2009Oct 16, 2012Medtronic Navigation, Inc.Method for navigating a catheter probe
USRE43952Oct 5, 1990Jan 29, 2013Medtronic Navigation, Inc.Interactive system for local intervention inside a non-homogeneous structure
USRE44305Feb 28, 2011Jun 18, 2013Medtronic Navigation, Inc.Percutaneous registration apparatus and method for use in computer-assisted surgical navigation