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Biomedical subjects

T Hattel

Publications and source records attributed to T Hattel.

At least 37 records · Page 2Linked to original sources
PubMed1987

Oral challenge with nickel and cobalt in patients with positive patch tests to nickel and/or cobalt.

During a 3-year period, 146 patients with positive patch tests to nickel and/or cobalt, for whom a systemic cause of dermatitis was suspected, were challenged orally with a single dose of 2.5 mg nickel given as nickel sulphate and 1 mg cobalt given as cobalt sulphate using a double-blind, placebo-controlled method. No following-up was possible for 2 patients. Seventy-five of the remaining 144 (52%) had flares of their dermatitis after challenge with nickel and/or cobalt, while 45 patients (31%) had no reaction and 24 (17%) reacted only to the placebo or to the placebo in combination with nickel or cobalt. Seven out of 13 patients with positive patch tests to cobalt experienced flares of their dermatitis only after challenge with cobalt.

Administration, Oral↗
PubMed1986

Aluminium allergy.

13 children ranging in age from 1 to 13 years and 1 adult patient had positive patch tests to 2% AlCl3 in water. 13 of them had pruritic excoriated papules, 9 at sites of hyposensitization therapy with aluminium-bound pollen extracts, and 4 at sites of childhood immunization with an aluminium-bound vaccine (Di-Te-Pol). For the 1 adult patient, the positive patch test was not considered to be of current relevance. Aluminium is most likely to sensitize when present in preparations used for immunization.

Adolescent↗
PubMed1985

Oral challenge with balsam of Peru.

A placebo-controlled, double-blind, oral challenge with balsam of Peru was carried out in 221 patients with various types of dermatitis. 210 patients completed the study, and 45 of them experienced a flare of their symptoms after challenge with balsam of Peru but not after placebo. 15 patients reacted to the placebo, and 5 reacted to both balsam and placebo. Specific reactivity to balsam of Peru was seen particularly in patients with positive patch tests to this compound and in some patch-test-negative patients with vesicular hand eczema, ano-genital and axillary eczema. Dietary restriction of the intake of balsams was followed by marked improvement or clearance of the dermatitis in approximately half of the patients who adhered to the diet for at least 1 month.

Administration, Oral↗
PubMed1985

Reduction of intake of balsams in patients sensitive to balsam of Peru.

64 patients participated in this study. 24 were patients who had positive patch tests to balsam of Peru. The dermatitis of 9 of the patients had flared after open oral challenge with balsam of Peru, and the dermatitis of 31 patients had flared after double-blind oral challenge. All 64 patients were asked to avoid food items suspected of containing balsams for 1 to 2 months. At the end of that time, an evaluation of the diet trial was made; the dermatitis of 37 had cleared or improved markedly. If an improvement had taken place, the patient was asked to continue to diet moderately. 6 months to 3 years after the diet was initiated, a questionnaire was mailed to those patients whose dermatitis had improved after the first trial. The patients were asked to evaluate the long-term benefit of following the diet. 30 felt there was a long-term effect, and 27 still followed the diet instructions to some degree.

Balsams↗
PubMed1985

Dietary treatment of nickel dermatitis.

During a 5-year period, 61 patch-test-negative patients whose dermatitis flared after oral challenge with 2.5 mg nickel and 143 patients with positive patch tests to nickel who were not challenged orally adhered to a diet intended to reduce the daily intake of nickel for at least one month. After 1 to 2 months of dieting the dermatitis in 121 of the 204 patients had cleared or was markedly improved. One to 5 years after the initial diet treatment a questionnaire was sent to the 204 patients to inquire about the long-term results of the diet treatment. 150 patients responded to the questionnaire. 90 of these patients had continued to diet constantly or intermittently for a year or more. 88 patients felt that there was a long-term improvement as a result of diet treatment.

Administration, Oral↗
PubMed1984

Hydrocortisone 17-butyrate (Locoid) 0.1% cream versus hydrocortisone (Uniderm) 1% cream in the treatment of children suffering from atopic dermatitis.

A randomized, double-blind, left-right study to compare the therapeutic efficacy of hydrocortisone 17-butyrate (Locoid) 0.1% cream with hydrocortisone (Uniderm) 1% cream was performed in forty children suffering from atopic dermatitis. The medications were applied to symmetrical bilateral skin lesions twice daily for a maximum of 4 weeks or until complete clinical clearance of such lesions had occurred. Complete clearance of skin symptoms was found in 36% of the Locoid-treated sides and in 23% of the Uniderm-treated sides following 2 weeks of therapy and in 60% and 30%, respectively, after 4 weeks of treatment. This difference in clearance rate after 4 weeks between both preparations was significantly in favour of Locoid cream. The expressed preferences of patients/parents and investigator were also significantly in favour of Locoid cream, both after 2 and 4 weeks. No serious side-effects were reported during this study. It is concluded that Locoid cream is significantly superior to Uniderm cream in the treatment of atopic dermatitis in children.

Administration, Topical↗
PubMed1983

Patch testing with substances not included in the standard series.

During a 5-year period, 3664 consecutive patients were patch tested in a private dermatology practice with the Standard Series of the International Contact Dermatitis Research Group (ICDRG). 454 of these were tested with one or more additional substances which were suspected of having caused their dermatitis. 194 of the 454 patients had positive reactions to one or more of the additional substances. Most of these reactions were of current relevance, and in only 25% of the patients could the allergies have been predicted by the use of the Standard Series alone. In approximately 50% of the patients, the reactions to additional substances could be traced to occupational sources.

Anti-Bacterial Agents↗
PubMed1983

Oral challenge with metal salts. (I). Vesicular patch-test-negative hand eczema.

202 patients, 68 males and 134 females, with patch-test-negative, symmetrical vesicular hand eczema were challenged orally in a controlled study with 2.5 mg nickel, 2.5 mg chromium and 1 mg cobalt given as salts of the respective metals. Initially a mixture of the 3 metal salts was given, and if this produced a flare of the eczema, the salts were administered individually at 1 week intervals. 55 patients reacted to the mixture of salts as well as to 1 or 2 of the individual salts. 3 other patients were challenged openly with nickel alone. Male patients reacted primarily to chromate and cobalt, while female patients more commonly reacted to nickel and cobalt. 56 patients were instructed to follow diets planned to reduce the daily intake of the respective metals. The dermatitis of 36 patients cleared or improved markedly after 1 month of dieting. Responses to a questionnaire sent to these 36 patients indicated that 28 of them had followed the prescribed diet rigorously or intermittently for at least a year, because they experienced recurrence of the dermatitis if they stopped dieting. 6 noted no long-term benefit and 2 did not respond.

Chromium↗
PubMed1983

Oral challenge with metal salts. (II). Various types of eczema.

299 patients with chronic dermatitis of obscure origin were challenged orally in a controlled study with 2.5 mg nickel, 2.5 mg chromium, and 1 mg cobalt given as salts of the respective metals. Flares of the dermatitis were seen in 12 of 61 patients with patch-test-negative hyperkeratotic eczema, in 9 of 32 patients with patch-test-negative perianal eczema, and in 7 of 143 patients with various other patch-test-negative eczemas. In this latter group, flares were seen only among patients with nummular eczema or hand eczema. Among 34 patients with various positive patch tests not relevant to the current dermatitis, 3 with hand eczema experienced flares. Patients who reacted to oral challenge with the metal salt to which they had a positive patch test, included 3 of 9 with nickel allergy, 2 of 5 with cobalt allergy and 6 of 15 with chromate allergy. These patients were tested openly. Low metal diets were prescribed for 33 patients who had flares after oral challenge with specific metal salts. For 23 of these, the dermatitis cleared or improved markedly after following the diet for at least 4 weeks. Responses to a questionnaire sent to the 23 patients indicated that 16 had followed the prescribed diet rigorously or intermittently for at least a year.

Chromium↗
PubMed1983

Causes of eczema in the food industry.

In a retrospective study covering a five-year period, 3664 consecutive patients suspected to suffer from contact dermatitis were patch tested in a private dermatology clinic. 180 of these patients had food handling occupations; they were employed in restaurant or institutional kitchens, fish factories, bakeries, or slaughterhouses. 25 of the 180 patients had protein dermatitis caused by meat or vegetables. This particular dermatitis was most common among restaurant personnel who make openface sandwiches and fish factory workers. 59 of the 180 patients had positive patch tests: 9 of these were to the food items: onion, lettuce, potato and carrot. For 91 of the 180 patients the dermatitis was considered to be occupational.

Dermatitis, Occupational↗
PubMed1982

Late effects of X-ray treatment of warts.

Five to 22 years after warts on hands and feet were treated by X ray, 1122 patients with a total of 3675 warts were re-examined. X-Ray therapy had been given as one dose of 3000 r using 29 kV with a 0.3-mm Al filter; 19% of the warts had been given two treatments. Sequelae were seen in 4.8% of the sites where warts had been given one X-ray treatment and in 12.2% of the sites after two treatments. These side effects include hyperkeratosis in the pressure areas of palms and soles and atrophy primarily in areas with a thin cutis. There was no evidence of malignant transformation in any treatment site, and there were no deep-seated side effects such as ostitis or tendinitis.

Adolescent↗
PubMed1982

Contact dermatitis in children.

168 children, 14 years of age or younger, were patch tested with the Standard Series of the International Contact Dermatitis Research Group (ICDRG) over a 5-year period. 77 of the children had 1 or more positive reactions; relevant test results were found in 80% of them. 8 boys and 24 girls were allergic to nickel, which proved to be the most common allergen; 5 boys and 6 girls reacted to chromate, and 5 boys and 4 girls reacted to one or more of the rubber chemicals.

Adolescent↗
PubMed1982

Patch testing with perfume mixture.

145 of 1116 patients patch tested with the standard series of the International Contact Dermatitis Research Group, including the recently introduced perfume mixture, had positive patch test reactions to at least one of the traditional screening agents for fragrance allergy or to the perfume mixture. In 96 of 145 patients the positive patch tests could be explained as being related to fragrance allergy. The perfume mixture was considered a useful screening agent for fragrance allergy. However, the results indicate that it is still necessary to employ several screening agents to detect this type of hypersensitivity.

Dermatitis, Contact↗