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Biomedical subjects

P Hendel

Publications and source records attributed to P Hendel.

6 recordsLinked to original sources
PubMed1990

Human cranial bone structure and the healing of cranial bone grafts: a study using backscattered electron imaging and confocal microscopy.

This study explored the microstructure of human cranial bone at different ages, and the survival, remodelling and modelling of cranial bone grafts. A combination of reflection and fluorescence confocal optical microscopy and scanning electron microscopy in the backscattered electron imaging mode was employed to examine highly polished block faces of plastic-embedded bone fragments as harvested for grafting, or recovered after a period in situ as a graft. The methods enabled remarkably detailed information on bone content, maturation and turnover to be gleaned from tiny scraps of bone. Microfractures in the harvested bone were repaired at the graft site, with welding of old and new bone indicating revascularization. Human cranial bone grafts successfully stimulated bone cell differentiation, supported new bone formation on resorbed and unresorbed surfaces, and underwent bone turnover. The type and organization of new bone reflected the growth rate and maturation of the graft rather than the age of the patient.

Adult↗
PubMed1990

[Distribution pattern of chemicals in surface waters as a reflexion of entry pattern--volatile halogenated hydrocarbons].

The part gives some data about various light volatile halogenated hydrocarbons in surface waters of the industrialized city and its surroundings--the halogenated forms, chloroform and bromoform and the most used solvents trichloroethylene, tetrachloroethylene, tetrachloromethane and 1,1,2,2-tetrachloroethane. 80% of the concentrations of chloroform, tri- and tetrachloroethylene were in the range of less than 1 microgram l-1, 90% of bromoform, tetrachloromethane and 1,1,2,2-tetrachloroethane were found to amount less than 0.1 microgram l-1. With the help of the differential-diagnostic assessment method described in the first part we tried to evaluate the data for tetrachloromethane. The highest values were obtained for almost all sampling points in April--a possible cause may be the use of this solvent for cleaning and repairing procedures with sport boats (although tetrachloromethane has been prohibited for such uses for some years there may be some remainders which were used for these purposes).

Hydrocarbons, Brominated↗
PubMed1990

[Distribution pattern of chemicals in surface waters as a reflexion of entry pattern--heavy metals].

The concentrations of the heavy metals lead, cadmium and mercury were measured in surface water samples of an industrialized city and its surroundings. All but one value of Cd (particular) were less than 0.5 microgram l-1, 30% of the lead (particular) values were less than 0.5 microgram l-1, 70% 0.5 ... 10 micrograms l-1, 86% of the total mercury less than 0.1 and 14% 0.1 ... 0.5 microgram l-1. By applying the differential-diagnostic assessment method it could be found that the highest values were found in the vicinity of a metal-using factory. On a sampling point near such an enterprise the part of particularly bound lead was very low, that means a recent input, whereas on another sampling point with a high total lead level 95% were particularly bound which refers to a continuous input.

Cadmium↗
PubMed1981

Primary toe-to-thumb transfer in the acutely avulsed thumb.

The case is presented of a primary toe-to-thumb transfer by microvascular anastomosis for reconstruction of an acute degloving amputation of the thumb. This approach is not recommended as the standard practice for this type injury, however, there were certain advantages in this patient: (1) one stage procedure, (2) restoration of length, sensibility, and cover, (3) cosmetic improvement, and (4) minimal length of hospitalization.

Adult↗
PubMed1977

Carcinoma of the parotid gland.

Sixty-nine patients with parotid gland cancer were studied at the Cancer Control Agency of British Columbia; half were treated successfully. Localized cancers should be treated by total parotidectomy with facial nerve preservation. Facial nerve sacrifice and radical neck dissection for metastatic lymph nodes may be required. If adequate surgery has been done, the histologic type of the tumor significantly determines the outcome. Postoperative radiation to the parotid bed in the more malignant types of tumor is advocated and appears to improve the results of treatment.

Adenocarcinoma↗