Chana
Barjinder Chana, Rancho Cordova, CA US
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20100292701 | SURGICAL SAW BLADE DEVICE AND SYSTEM - A saw blade assembly for use with a driver having an oscillatory drive member comprises an elongate sheath and an elongate monolithic blade. The sheath's proximal end is removably mountable on the driver. The sheath has an open interior which receives the blade. The blade's proximal end is pivotably mounted to the sheath's proximal end. The blade's distal cutting end extends out of the sheath's distal end and is transverse to the blade's central longitudinal axis. When cutting bone, the drive member pivots the blade's cutting end back and forth in an arc about a pivot point at the blade's proximal end while the driver holds the sheath stationary to protect surrounding tissues from the motions of the remainder of the blade. The long pivot radius between the proximal pivot point and the distal cutting end contributes to minimizing the angle of engagement of the cutting end to the bone. | 11-18-2010 |
Barjinder Chana, Reno, NV US
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20110093081 | KNEE BALANCING FOR REVISION PROCEDURES - Methods, systems and devices are provided for facilitating a surgical procedure on a knee, particularly, a revision total knee replacement procedure. Prior femoral and tibial prostheses are removed. A cut end of a distal femur is engaged with a femoral adjustment member, which will typically center itself about an intermedullary rod placed into the femur. The lateral and medial forces exerted by lateral and medial sides of the femoral adjustment member and the cut tibial plateau against each other are measured. The femoral adjustment member is adjusted to apply and/or adjust tension to the lateral collateral ligament and/or the medial collateral ligament based on the measured forces, for example, such that the measured lateral force and the measured medial force are matched. Based on the position of the adjusted femoral member, guided clean-up cuts for placement of a new femoral prostheses are made on the cut end of the distal femur. | 04-21-2011 |
Barjinder S. Chana, Rancho Cordova, CA US
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20130261504 | TIBIAL PROSTHESIS SYSTEMS, KITS, AND METHODS - Systems for determining force balance on a knee joint during a surgical procedure are disclosed. A system can include a tibial prosthesis. The tibial prosthesis can include a bearing component, a base component, and a shim component. The bearing component can have a superior articulating surface and an inferior surface. The bearing component can include a top portion, a bottom portion, a frame disposed between the top portion and the bottom portion, and a plurality of sensors disposed between the frame and the bottom portion. The frame can have a plurality of apertures corresponding in size or shape to the plurality of sensors. The base component can have a superior surface and an inferior surface. The shim component can be configured to be slidable between the inferior surface of the bearing component and the superior surface of the base component in an anterior to posterior direction. | 10-03-2013 |
20130261758 | TIBIAL PROSTHESIS SYSTEMS, KITS, AND METHODS - Tibial prosthesis methods for balancing a knee joint during a surgical procedure are disclosed. A method can comprise inserting a first tibial shim component between a tibial bearing component and a tibial base or a tibial plate component in an anterior/posterior direction. The first tibial shim component can include one or both of a medial edge having a different height than a lateral edge or an anterior edge having a different height than a posterior edge. The method can further comprise testing one or more of a stability, a force balance, or a range of motion of a knee joint in which the first tibial shim component is inserted. If the testing result is not satisfactory, the method can include removing the first tibial shim component, and inserting a second tibial shim component between the tibial bearing component and the tibial base or tibial plate component in the anterior/posterior direction. | 10-03-2013 |
Barjinder S. Chana, Reno, NV US
Patent application number | Description | Published |
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20130296860 | KNEE BALANCING FOR REVISION PROCEDURES - Methods, systems and devices are provided for facilitating a surgical procedure on a knee, particularly, a revision total knee replacement procedure. Prior femoral and tibial prostheses are removed. A cut end of a distal femur is engaged with a femoral adjustment member, which will, typically center itself about an intermedullary rod placed into the femur. The lateral and medial, forces exerted by lateral and medial sides of the femoral adjustment member and the cut tibial plateau against each other are measured. The femoral adjustment member is adjusted to apply and/or adjust tension to the lateral collateral ligament and/or the medial, collateral ligament based on the measured forces, for example, such that the measured lateral force and the measured medial force are matched. Based on the position of the adjusted femoral member, guided clean-up cuts for placement of a new femoral prostheses are made on the cut end of the distal femur. | 11-07-2013 |
Barjinder Singh Chana, Rancho Cordova, CA US
Patent application number | Description | Published |
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20100198275 | FORCE SENSING DISTAL FEMORAL ALIGNMENT SYSTEM AND METHOD OF USE - Devices, systems, and methods are provided for facilitating the aligning and balancing of the knee during total knee replacement surgery. A femoral assembly is engaged with a distal femur. The positions of medial and lateral portions of the femoral assembly relative to a stationary portion of the femoral assembly can be separately adjusted to adjust the alignment of the knee. A force sensor will be provided to sense the forces in the medial and lateral portions of the knee, and the medial and lateral portions of the femoral assemblies will be adjusted so that the sensed forces are balanced. The alignment of the knee is visually verified using a knee alignment verification member coupled to the femoral assembly. The knee alignment verification member may emit laser beams along the mechanical axes of the femur and tibia, or the knee alignment verification member may couple to alignment rods aligned along these axes. | 08-05-2010 |
Barjinder Singh Chana, Reno, NV US
Patent application number | Description | Published |
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20120259342 | SYSTEM FOR POSITIONING A CUTTING GUIDE IN KNEE SURGERY - A system is provided for positioning a cutting guide on a femur of a knee to make a cut along a distal end of the femur during knee surgery. The system may generally include an adjustable femoral attachment member configured to attach to a cut distal end of the femur, a cutting guide removably attachable to the femoral attachment member and configured to guide a surgical saw to make an additional cut on the distal end of the femur, and a force sensor for positioning between the femoral attachment member and a proximal end of a tibia of the knee. The force sensor may include a medial portion for sensing a medial force in the knee and a lateral portion for sensing a lateral force in the knee. | 10-11-2012 |
Tejender Chana, Calgary CA
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20110136513 | System and Method for Limiting a Wireless Communication Device to a Specified Geographic Zone - A method, computer code product for limiting a wireless communication device to a specified geographic zone. The device is configured to connect to a subscriber device in a subscriber network and determine if the subscriber device is on a list of preapproved subscriber devices in the specified geographic zone. The device can also be configured to determine if it is connected to a subscriber device on at least one neighbor list of approved subscriber devices. If the device is connected to a subscriber device on the preapproved list or a neighbor list, the device is permission as if it is in the geographic zone. Additional subscriber devices can be added to the neighbor list(s) when the device is handed off from an approved subscriber device based on the previous subscriber device to which the device was connected. | 06-09-2011 |