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Biomedical subjects

B Zederfeldt

Publications and source records attributed to B Zederfeldt.

At least 91 records · Page 5Linked to original sources
PubMed1979

Serum zinc before and after cholecystectomy in zinc-treated patients.

Nine female patients were given zinc sulphate (Solvezinc) 220 mg three times daily for 4 weeks prior to cholecystectomy. Mean serum zinc before zinc treatment was 17 +/- 0.8 mumol/l and rose 25 +/- 1.6 mumol/l after zinc treatment. 6 hours postoperatively serum zinc was 13 +/- 1.4 mumol/l. Thereafter it gradually increased to 20 +/- 0.7 mumol/l by the third postoperative day. The present investigation thus shows that pretreatment with zinc increases the serum zinc level but does not prevent the drop in serum zinc in connection with cholecystectomy. However, with the pretreatment serum zinc never falls below the normal range.

Administration, Oral↗
PubMed1978

Healing of experimental colonic anastomoses. The effect of suture technic on collagen concentration in the colonic wall.

The present experimental study in rats has demonstrated a marked difference in the healing process of anastomoses in the left colon following two different suture technics: continuous and interrupted sutures. Rats having anastomoses constructed of continuous suture showed a high incidence of complications and a marked decrease of collagen concentration in the anastomosis and in the colonic wall proximal to the anastomosis during the first week of healing. In animals with anastomoses made of interrupted sutures there were fewer complications, the decrease in collagen concentration was confined to the anastomotic region, and the recovery of collagen concentration occurred earlier. The findings indicate that the interrupted suture technic is preferable for anastomosis in the left colon.

Animals↗
PubMed1977

Efficacy and tolerance of Flunixin (SCH 14714) in the treatment of postoperative pain, with observations on the methodology of postoperative pain studies.

A new anti-inflammatory, antipyretic and analgesic drug 2(2'-methyl-3'-trifluoromethylanilino)-nicotinic acid (Flunixin, Sch 14714) was compared with aspirin and a placebo in a double-blind study of pain after four different types of operation. Sch 14714 proved to be superior to the two other drugs after herniorraphy and venous surgery of the leg. The frequency of adverse effects after this drug was, at most. 1.2% which did not differ from the side-effect rates of aspirin or placebo. The second and third days after operation yielded a very high rate of optimal pain relief scores resulting in poor discrimination. Thus cross-over studies seem to be superfluous in the study of pain-relieving drugs in the period following surgery. The patients' rather low demand of analgesic drugs indicated that more stringent enrollment criteria should be adhered to. It was also shown that radical venous surgery constituted a good model for pain studies.

Aniline Compounds↗
PubMed1977

Surgical management of gastroduodenal haemorrhage.

We have presented a retrospective study of the surgical management of 299 patients bleeding from duodenal ulcer, gastric ulcer or gastritis. The overall mortality rate was 15%-5% for elective and 25% for emergency operations. The mortality increased with age and reached 50% for emergency operations in patients over the age of 70. Patients with low admission haemoglobin values, who had episodes of hypovolemic shock or who required immediate transfusions were also at risk. A Billroth I gastric resection proved to be the safest operative procedure. Based on our results, we are supporting a program calculated to reduce the mortality attending gastroduodenal bleeding, especially in those patients requiring an emergency operation. The basic principles of this program are constant observation, prompt diagnosis and early surgical intervention.

Blood Transfusion↗
PubMed1975

Histological studies on granulation tissue from bipedicle tube flaps.

Histological studies were performed on granulation tissue from cylinders implanted 2 to 8 weeks and 4 months in bipedicle tube flaps on rabbits. Tissue from cylinders implanted in skin folds were used as controls. Flap and control tissue showed similar changes over the weeks. At weeks 2 and 3 the tissue was rich in cells, blood vessels and collagenous fibres. At week 4 the tissue showed transitional changes to week 5, when there were zones of loosely textured tissue with fine, fragmented collagen fibres. At week 5 some of the loose tissue was replaced by fat. Macrophages and inflammatory cells had appeared. By week 7 the fatty and collagenous tissue was mature and macrophages and inflammatory cells had disappeared.

Adipose Tissue↗
PubMed1975

Oxygen consumption by granulation tissue in bipedicle tube flaps.

The oxygen consumption rate (QO2) of granulation tissue from cylinders implanted in bipedicle tube flaps of rabbits was measured weeks 2 to 7 in vitro in a Biological Oxygen Monitor. Granulation tissue from cylinders implanted in skin folds was used as control. The QO2 of granulation tissue decreased slowly as the oxygen tension in the medium fell. All measurements were made at an oxygen tension of 75 mmHg. At week 2 the QO2 of granulation tissue in flaps was high and a decrease occurred between week 2 and week 4. A further decrease took place between weeks 6 and 7 and a very low QO2 was found at week 7. Control granulation tissue showed a higher QO2 than skin flap granulation tissue at weeks 3, 4, 5 and 7.

Animals↗
PubMed1975

Protein synthesis by granulation tissue in bipedicle tube flaps.

The protein synthesis and the collagen synthesis by 2- to 7-week-old granulation tissue from implanted cylinders in bipedicle tube flaps on rabbits were measured in vitro by the incorporation of 14C-proline in proteins and in collagen hydroxyproline. Granulation tissue from cylinders implanted in skin folds were used as controls. In the skin flap group the protein synthesis was high at week 2, after which it decreased to week 5. In the controls the protein synthesis was the same as in the skin flap group at week 2. A decrease occurred between weeks 2 and 4 and a further decrease between weeks 6 and 7. At weeks 5 and 6 the protein synthesis was higher in the controls than in the skin flap group, but at week 7 it was the reverse. The collagen synthesis was high and equal in both groups at weeks 2 and 3 and then decreased to weeks 4 and 5. Between weeks 6 and 7 a further decrease was found in the controls, but not in the skin flap group.

Animals↗
PubMed1975

Granulation tissue formation in viscose cellulose sponges of different design.

Granulation tissue formation was studied in subcutaneously implanted viscose cellulose sponges of different design using histological and chemical methods. Two different models of sponges were used, one of cubical shape and another rectangular and thin. The sponges had the same weight. After one week of implantation, histological examination of the cubical sponges showed granulation tissue only in the periphery and a central cavity filled with inflammatory cells. The histological texture of the thin sponges showed that they were almost completely filled with granulation tissue with a minimal central cavity and very few inflammatory cells. DNA values of the cubical sponges were about 20% higher than those of the thin sponges. After aspiration of the exudate in the cubical sponges, the DNA values were about the same as those in the thin sponges. The amount of hydroxyproline and RNA were about the same regardless of whether the sponges were cubic or thin or the exudate of the cubic sponges had been aspirated or not. At two weeks there was still a central cavity in the cubic sponges but very few inflammatory cells. DNA values at this time of observation were also the same in both models of sponges. Thus the thin-shaped model of sponge seems to be preferable to the cubic one when the time of observation is shorter than two weeks.

Animals↗
PubMed1975

Granulation tissue formation in oophorectomized rats treated with female sex hormones. I. A histological study.

Granulation tissue formation was studied in experimental granulomas up to three weeks in oophorectomized rats treated with female sex hormones. The influence of estrogen and progesterone during the early phase of healing could sucessfully be followed histologically. The amount of DNA and hemoglobin in the granulomas correlated well with the amount of cells and the capillary bed found in the histological sections.

Animals↗
PubMed1975

Granulation tissue formation in oophorectomized rats treated with female sex hormones. II. Studies on the amount of collagen and on tensile strength.

The content of hydroxyproline and tensile strength of granulation tissue was studied in oophorectomized rats treated with female sex hormones. Estrogen alone caused a slight decrease of hydroxyproline, but had no effect on the tensile strength of the granulation tissue at one week. Progesterone alone or in combination with estrogen decreased the content of hydroxyproline and the tensile strength of the granulation tissue up to one week in the case of progesterone-treated animals and up to two weeks in the case of animals treated with the combination of the hormones. At one week no direct correlation was found between the amount of hydroxyproline and the tensile strength of granulation tissue in oophorectomized rats treated with estrogen and progesterone in combination.

Animals↗