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Biomedical subjects

R Reck

Publications and source records attributed to R Reck.

65 records · Page 4Linked to original sources
PubMed1975

[Postoperative pancreatitis].

Incidence and extent of increased alpha-amylase concentration were examined in serum and urine following routine surgical intervention in the epigastrium. Only patients with non-specific clinical symptoms (n=49) and a control group who had undergone surgery for inguinal hernia (n=10) were included in the study. Patients previously subjected to gastric surgery (selective gastric vagotomy = 10, gastric resection according to Billroth I = 10) were significantly more often found to have results within a range usually considered pathological. Patients who had undergone surgery of the bile duct were markedly less affected. The diagnosis, based on the benefit of the hindsight, of a postoperative pancreatitis in cases where specific complaints and increased maylase concentration coincide does therefore not appear justified--particularly following gastric surgery. This becomes significant if a choice between various conservative treatments or relaparotomy is being considered.

Abdomen↗
PubMedDate not supplied

Value and limits of computer-assisted tomography.

Three years ago, at the VIIth International Congress of Radiology in Otorhinolaryngology, held in Copenhagen, the early impressive results of computer-assisted tomography (CAT) in otorhinolaryngology were presented. Since considerable technologic and diagnostic progress of CAT has taken place in the meantime, questions about the increase in CAT's value and the expansion of its limits are appropriate now. Computed and, in some cases, conventional tomograms of facial lesions are used in the discussion of these questions. There is no doubt of CAT's advance within the last few years; there are, however, limits of CAT to be emphasized: (a) coronal CAT might be uncomfortable (especially if the gantry cannot be tilted), unsuccessful (e.g., in cases of neck stiffness), and even dangerous (when head injury is combined with trauma to the cervical spine); (b) enhancement is often not useful (except when intracranial tumor invasion is suspected); (c) specific diagnosis, based on CAT findings only, is impossible in most cases; (d) the radiation dose, which increases with improvement in the quality of the image, must be considered in each case; and (e) CAT does not replace conventional x-ray techniques, least of all polytomography.

Aged↗
PubMedDate not supplied

[Calcium phosphates in otological surgery. II. The bony integration of calcium phosphates. An experimental study].

Calcium phosphates have been proposed for obliteration of the mastoid cavity as well as TORP and PORP. Their use is based on a very good biocompatibility and host acceptance. The osseous integration of a dense and a porous hydroxyapatite is studied experimentally in artificially created epitympanic holes of rabbits. Osteoneogenesis was observed from the third week after surgery starting from the walls od the defects themselves. This had been evidenced using intravital fluorescent dyes. Porous granules showed more "osteoconductivity" in the beginning, probably due to their greater surface area. Bonding osteogenesis with both materials did not show differences after six months. No resorption was observed, excepting remodelation processes.

Animals↗
PubMedDate not supplied

[Calcium phosphates in otologic surgery. III. The role of fibrin glue in the integration of calcium phosphate implants. Experimental study].

Obliteration of the mastoid cavity has been realized with calcium phosphates associated to heterologous fibrin glue in otologic surgery. 22 artificially created epitympanic and 65 femoral defects in 22 rabbits were closed by means of dense or porous granulates of hydroxyapatite with homologous fibrin glue. Follow-up was for three weeks to 6 months. Osteo-integration of the implants was significantly delayed in the first weeks, comparing the integration of the same phosphates without fibrin glue.

Animals↗
PubMedDate not supplied

[Calcium phosphates in surgery of the middle ear. I. The concepts and definitions].

The techniques which pursue the closure of radical cavities include the use of local flaps as well as alloplastic material. Calcium phosphates are classified as "degradable" or "not degradable". The paper tries to offer an explanation why hydroxyapatite or tricalcium phosphate, mostly used calcium phosphates, may be include in both groups. The introduction in the use of alloplastic materials should serve as orientation for those who initiate and stimulate to revision of clinical results. The comparison of same calcium phosphates seems not to be possible as their preparation techniques may be completely different.

Biocompatible Materials↗