Thompson Hip Prosthesis Specification, Indication, Uses, Images and Sizes.

Thompson Hip Prosthesis

Thompson Hip Prosthesis Specification

Thompson Hip Prosthesis is design for patient with limited femoral neck above the lesser trochanter.
Designed for use as a salvage prosthesis for femoral neck fractures, nonunions, in femoral neck fractures with a shortened femoral neck (due to bony resorption).
More vertical angle of the collar on the Thompson prosthesis tends to allow sinking of the prosthesis into the medullary cavity.
Thompson prosthesis has a more vertical neck angle and is better indicated for the patient with a low or distal neck fracture.
Thompson Prosthesis is cemented
Thompson Prosthesis available in different head sizes to fit accurately in the acetabulum. Available Head Dia sizes are 37mm, 38mm, 39mm, 40mm, 41mm, 42mm, 43mm, 44mm, 45mm, 46mm, 47mm, 48mm, 49mm, 50mm, 51mm, 52mm, 53mm, 54mm and 55mm. Any other Sizes will be also made on demand
Available in both Sterile and Non-Sterile packing.
Made up from high quality Medical grade stainless steel.
Available in 3 types of Stem: Standard Stem, Narrow Stem and Extra Long Stem to choose according for best fit.

Thompson Hip Prosthesis Indication

Thompson Hip Prosthesis is commonly used for the treatment of fractures of the femoral neck elderly patients.

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Thompson Hip Prosthesis Instruments Set Features

Thompson Hip Prosthesis Instruments Set

Thompson Hip Prosthesis Instruments Set contains instruments required for Standard Stem, Narrow Stem and Broad Stem Hip Prosthesis.

Features:

Instruments for Standard Stem, Narrow Stem and Broad Stem Hip Prosthesis.
Instruments are organised in general order of use.
Instruments are fitted in Silicon Foam.
Graphics of instruments are made in instruments Box to keep Instruments at their define places.

Thompson Prosthesis Instruments Set Items

Below are list of items in Thompson Hip Prosthesis Instruments Set. Instruments can be modified according to the customer’s requirement. All these instruments can be used several times. These instruments are Non Sterile.

Our Orthopedic Instruments Set comprises many of items which are manufacture by superior grade of stainless steel, Aluminum and Carbon Fiber etc. These are the tools specifically designed to carry out different actions and to achieve various purposes during a surgery or an operation we are paying our best efforts which meets the same quality standards of all orthopedic instruments as needed.

We are keeping wide range of instruments items in instruments set to ensures that Doctors get almost all required items during surgery for Thompson Hip Prosthesis Instruments Set.

List of items in Thompson Hip Prosthesis Instruments Set Items:

- Murphy Lane Bone Skid
- Measuring Gauge For Prosthesis 37 mm to 55 mm
- Moore Hollow Chisel
- Hammer 500 Grams
- Bone File Flat Extended
- Impactor- Nylon Faced
- Impactor- Nylon Faced
- Judet Auger Extractor
- Inserter Rod
- Hammer for Inserter Rod
- Inserter Rod Handle
- Rasp for Austin Moore
- Rasp for Thompson
- Tomy Bar for Austin Moore Rasp
- Tomy Bar for Thompson Rasp
- Extractor Hook-1
- Extractor Hook-2
- Extractor Hook-3
- Graphics Aluminium Box with Silicone Fittings

Thompson Hip Prosthesis Surgical Technique

STEP 1
Confirm that a hemi-arthroplasty is indicated.

STEP 2
The patient is positioned and prepared on the operating table in the usual manner. Expose the hip joint using your preferred surgical approach for hemi-arthroplasty.

STEP 3
Following exposure of the hip, cut the femoral neck. In most individuals an appropriate level of neck resection lies along a line drawn from a point medially mid-way between the upper margin of the lesser trochanter and inferior aspect of the head, to a point laterally at the base of the neck.

If the neck is cut too long, the leg will be lengthened, and the hip will be tight and difficult to reduce. The converse will be the case if the cut is too low, and the hip may be unstable. The neck cut may need to be modified a little higher or lower in valgus or varus hips,
respectively.

Remove and measure the femoral head or alternatively use an appropriate instrument to measure the size of the acetabulum. Select an implant with a femoral head of the same size.

STEP 4
Ensuring the gluteus maximus tendon is retracted and protected, a box chisel is used to open the proximal femur. This should be positioned laterally and posteriorly to gain exposure in line with the femoral canal.

STEP 5
Proximal femur preparation is made with the femoral rasp. This should be done by hand unless the bone is unusually hard, as using a hammer risks fracturing a fragile osteopenic femur.

The rasp should be inserted with the required amount of anteversion: typically this is between 0° and 20° depending on the preferred approach. The rasp should be inserted to a depth where the top cutting teeth line up with the neck resection line.

STEP 6
Following rasping, insert the definitive stem to ensure correct fit, seating and alignment can be achieved. Trim the neck if required to allow the collar of the prosthesis to sit flush. Confirm version is correct (see step 5). A trial reduction can be performed if required.

NB If performing a trial reduction, take great care when re-dislocating the hip. A swab around the neck of the prosthesis or a bone hook should be used to help dislocate and deliver the femoral head out of the acetabulum. Undue torsional force applied through the leg can fracture an osteoporotic femur.

STEP 7

Proceed with the preferred method of cementing technique. (Modern cementing techniques are recommended, including the use of a distal cement plug, thorough lavage and drying of the canal and retrograde filling with a cement gun).

The stem is inserted by hand until the collar of the prosthesis reaches the neck resection line on the medial calcar. The surgeon must hold the stem in position with the Femoral Head Driver until the bone cement is fully polymerised.

STEP 8

Remove any excess cement from around the neck of the Thompson Hip Prosthesis and take care to ensure that the acetabulum is clear of any cement, bone fragments of soft tissue before reducing the hip. Confirm stability and a concentric reduction before layered wound closure.

The general post-operative management of the patient should follow the normal protocols of the operating surgeon and the institution in which the surgery was performed

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Thompson Hip Prosthesis Contraindications

Contraindications may be qualified or total, and need to be taken into consideration when evaluating the prognosis in each case. Alternative management techniques may need to be considered under the following conditions:

Acute or chronic infections, either local or systemic.
Local or systemic accurate or chronic inflammation.
Serve muscular, nervous or vascular disease endangering the affected area.
Defective bone structures, which would impede adequate anchoring of the implant.
All associated diseases which could endanger the function and success of the implant.

Warnings and Precautionary for Thompson Hip Prosthesis

Before using Thompson Hip Prosthesis, the surgeon and ancillary staff should study the safety information in these instructions, as well as any product-specific information in the product description, surgical procedures and/or brochures.

Thompson Prosthesis is made from medical grade materials and are designed, constructed and produced with utmost care. These quality Thompson Prosthesis assure best working results provided they are used in the proper manner. Therefore, the following instructions for use and safety recommendations must be observed.

Improper use of Thompson Hip Prosthesis can lead to damage to the tissue, premature wear, destruction of the instruments and injury to the operator, patients or other persons.

It is vital for the operating surgeon to take an active role in the medical management of their patients. The surgeon should thoroughly understand all aspects of the surgical procedure and instruments including their limitations. Care in appropriate selection and proper use of surgical instruments is the responsibility of the surgeon and the surgical team. Adequate surgical training should be completed before use of implants.

Factors which could impair the success of the operation:

Allergies to implanted materials.
Localized bone tumours.
Osteoporosis or osteomalacia.
System disease and metabolic disturbances.
Alcohol and drug abuse.
Physical activities involving excessive shocks, whereby the implant is exposed to blows and/or excessive loading.
Patients who are mentally unable to understand and comply with the doctor’s instructions.
Poor general health.

Possible Adverse Effects

The following adverse effects are the most common resulting from implantation:

Loosening of the Thompson Prosthesis, which may result from cyclic loading of the fixation site and/or tissue reaction of the implant.
Early and late infection.
Further bone fracture resulting from unusual stress or weakened bone substance.
Temporary or chronic neural damage resulting from pressure or hematomata.
Wound hematomas and delayed wound healing.
Vascular disease including venal thrombosis, pulmonary embolism and cardiac arrest.
Heterotopic ossification.
Pain and discomfort due to presence of the Thompson Hip Prosthesis.
Mechanical failure of the implant, including bending, loosening or breakage.
Migration of implant resulting in injury.

Preoperative Planning for Thompson Prosthesis

The operating planning is carried out following a thorough clinical evaluation of the patient, Also, x-rays must be taken to allow a clear indication of the bony anatomy and associated deformities. At the time of the operation, the corresponding implantation instruments in addition to a complete size of Thompson Hip Prosthesis must be available.

The clinician should discuss with the patient the possible risks and complications associated with the use of implants. It is important to determine pre-operatively whether the patient is allergic to any of the implant materials. Also, the patient needs to be informed that the performance of the device cannot be guaranteed as complications can affect the life expectancy of the device.

Thompson Prosthesis Precautions

Confirm functionality of instruments and check for wear during reprocessing. Replace worn or damaged instruments prior to use.
It is recommended to use the instruments identified for this Thompson Hip Prosthesis.
Handle devices with care and dispose worn bone cutting instruments in a sharps container.
Always irrigate and apply suction for removal of debris potentially generated during implantation or removal.

Thompson Hip Prosthesis Warnings

Thompson Hip Prosthesis can break during use (when subjected to excessive forces). While the surgeon must make the final decision on removal of the broken part based on associated risk in doing so, we recommend that whenever possible and practical for the individual patient, the broken part should be removed. Be aware that implants are not as strong as native bone. Implants subjected to substantial loads may fail.
Instruments, screws and cut plates may have sharp edges or moving joints that may pinch or tear user’s glove or skin.
Take care to remove all fragments that are not fixated during the surgery.
While the surgeon must make the final decision on implant removal, we recommend that whenever possible and practical for the individual patient, fixation devices should be removed once their service as an aid to healing is accomplished. Thompson Hip Prosthesis removal should be followed by adequate post-operative management to avoid refracture.

Thompson Hip Prosthesis General Adverse Events

As with all major surgical procedures, risks, side effects and adverse events can occur. While many possible reactions may occur, some of the most common include: Problems resulting from anesthesia and patient positioning (e.g. nausea, vomiting, dental injuries, neurological impairments, etc.), thrombosis, embolism, infection, nerve and/or tooth root damage or injury of other critical structures including blood vessels, excessive bleeding, damage to soft tissues incl. swelling, abnormal scar formation, functional impairment of the musculoskeletal system, pain, discomfort or abnormal sensation due to the presence of the device, allergy or hypersensitivity reactions, side effects associated with hardware prominence, loosening, bending, or breakage of the device, mal-union, non-union or delayed union which may lead to breakage of the Thompson Hip Prosthesis, reoperation.

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