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Biomedical subjects

R L Huckstep

Publications and source records attributed to R L Huckstep.

15 recordsLinked to original sources
PubMed1987

Intraluminal allograft restoration of the upper femur in failed total hip arthroplasty.

Deep-frozen cancellous allografts have been used to restore the proximal femur of 23 hips following failed total hip arthroplasty. The canal is cleared and reaming is performed under direct vision through a cortical window. A modified Huckstep prosthesis permits early weight-bearing on the distal femur regardless of the state of proximal bone, but retains the option for later restoration of proximal loading once grafts appear mature. This transfer has been performed on four occasions. All 23 patients have had relief of pain with early ambulation. The follow-up periods ranged from six to 30 months. With the exception of one deep infection, the grafts have not undergone resorption in this period of follow-up study. Consolidation appears slower when the defect has followed multiple operations than following an initial revision for prosthetic loosening. The basic bone bank facilities are required for the supply of frozen allografts.

Aged↗
PubMed1987

Effect of a static magnetic field on fracture healing in a rabbit radius. Preliminary results.

To ascertain what effect a static magnetic force has on a healing fracture, samarium cobalt magnets were implanted adjacent to induced radial fractures in adult rabbits. A magnetic field of 220-260 G was generated at the fracture site. The radii were allowed to heal for four weeks and the contralateral fractured bones acted as controls. Healing bone units were assessed microscopically and mechanically. Significantly greater forces (p less than 0.01) were required to break those bone units exposed to magnetic fields. However, no significant difference was found when comparing the longitudinal midcallus areas from magnetized and nonmagnetized limbs.

Animals↗
PubMed1987

Stabilization and prosthetic replacement in difficult fractures and bone tumors.

Comminuted fractures of the femoral shaft, especially when combined with fractures of the hip, may be difficult to treat. A four-sided titanium alloy locking nail with transfixing screws was designed in 1967 and allows compression of the fracture site. If necessary, the nail may be inserted without intraoperative roentgenograms, and permits early weight-bearing in most cases. One hundred seventy-one difficult fractures in femora, humeri, tibiae, and ulnae have been treated with this nail since 1974. Many cemented total hip arthroplasties are failing. A cementless, modular titanium alloy and alumina hip, based on the nail with a modular alumina or titanium head, will allow cementless hemi- or total hip arthroplasty. Porous, 200-microns ceramic coating on the stem allows bone ingrowth while transfixing screws allow full and immediate postoperative weight-bearing. A ceramic sleeve and spacers also allow modular replacement of the upper three-quarters of the femur for tumors and trauma. A similar shoulder and humerus is also available. Fifty-four hips and two shoulders have been successfully replaced since January 1983. In addition, 285 bones with pathologic or potential pathologic fractures caused by secondary tumors have been stabilized by the author between August 1972 and August 1986, with a variety of implants.

Adult↗
PubMed1986

The Huckstep intramedullary compression nail. Indications, technique, and results.

A four-sided, intramedullary compression nail of solid titanium alloy has been developed since 1967. This nail is 12.5 mm in diameter with 4.5-mm transverse holes at 15-mm intervals, for 4-mm fine threaded screws. It has four oblique holes in the proximal end to allow 4.5-mm lag screws to be inserted up the femoral neck. A compressor over the trochanter can be used for compression in transverse fractures. Advantages include inert titanium alloy, which is stronger than the average femoral shaft, a recessed end of the nail, reaming to only 13 mm, and a quadrilateral shape. No operative roentgenograms are usually required. Comminuted, oblique, and infected fractures of the entire length of the femoral shaft down to the supracondylar region can be held rigidly, usually allowing for immediate weight-bearing. The femur can be lengthened or shortened with compression and the knee can be arthrodesed with a 60-cm nail. One hundred twenty-two nails inserted since 1974 included 32 comminuted or oblique acute femoral fractures. Forty-two patients had had failure of other implants. Among these, 34 had nonunion for one year and 17 nonunion for more than three years. Fifty-one bones in 47 patients were stabilized for pathologic fractures and other conditions. Complications were minimal.

Adolescent↗
PubMed1978

Simulation of injuries in disaster exercises.

It is essential that hospitals, doctors, nurses, ambulances, helicopters, police, fire services and all others involved in major accidents or disasters should have adequate training in the assessment, management and transport of casualties by the means of regular disaster exercises. These practices, whether small or large, are much more realistic if casualties are properly made up to simulate the injury that they are supposed to represent, and if the 'patients' can act the part. The illustrations in this article show how real the make-up can be and how seriously the doctors, nurses, ambulance officers, fire and police officers and others take these exercises which often have between 100-200 'victims'.

Disaster Planning↗
PubMed1978

Simple guidelines to disasters.

Good organization and communications are essential in the management of disasters and major accidents. A quick method of assessment of patients and simple guidelines to resuscitation, splinting and emergency care are given in this illustrated paper on the optimum procedures to be followed by doctors and other who may be asked to assist.

Accidents↗
PubMed1977

Early mobilization and rehabilitation in fractures and orthopaedic conditions.

Many advances have taken place during the past decade in the early mobilization of orthopaedic patients and those with injuries. Light-weight scientific splinting, early rigid fixation with compression plates and nails, and the early mobilization of patients with pathological fractures in neoplastic disease, have meant that these patients can often be mobile in days, and home in a fortnight, instead of spending months languishing in hospital. Scientific treatment of patients with neck and low back pain may similarly minimize chronic disability, while early rehabilitation can enable their early return to employment. It is the purpose of this paper to underline some of the important advances in treatment which have made this possible.

Adult↗