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L Vestergaard

Publications and source records attributed to L Vestergaard.

5 recordsLinked to original sources
PubMed1999

Histological distinction between early allergic and irritant patch test reactions: follicular spongiosis may be characteristic of early allergic contact dermatitis.

Comparative light microscopic studies have revealed subtle differences between allergic and irritant reactions in the skin. In the search for specific differences, we focussed on the early inflammatory response. This pilot study was conducted to test the hypothesis that follicular spongiosis can differentiate between early allergic and irritant patch test reactions. 8 patients with known contact allergy to either colophony or quarternium-15 participated in the study. In each patient, allergic and irritant patch tests reactions were elicited, and 4-mm punch biopsies were taken after 6 8 h from clinically equipotent reactions. Paired sets of slides were assessed blindly by 2 pathologists. 1 patient showing a pityrosporum folliculitis was excluded from the study. All biopsies from allergic patch tests were characterized by follicular spongiosis, while biopsies from irritant patch tests showed no recognizable changes except a slight follicular spongiosis in 1 patient. The 2 pathologists agreed independently on the correct classification in 6 out of 7 cases (p=0.0156). We tested an optimized model, selecting non-irritant allergens and a well-known irritant. Further investigations are needed to elucidate the diagnostic significance of the histological classification of allergic and irritant cutaneous reactions in punch biopsies.

Adult↗
PubMed1997

[Contact allergy to local steroids. Contact allergy to corticosteroids among consecutively tested patients with eczema].

We studied the frequency of contact dermatitis to corticosteroids in consecutive eczema patients and the relevance of positive patch test reactions. Of 2,742 patients patch tested at the Dermatology Clinic at Odense University Hospital between June 1991 and December 1995, 65 patients (47 women and 18 men) or 2.4% had a positive reaction to one or more of the corticosteroids tested. Forty (1.45%) had a positive reaction to budesonide 1% pet. in the standard series. For a one-year period 662 consecutive eczema patients were routinely patch tested with a corticosteroid series consisting of five steroid allergens, and 17 had a positive reaction to at least one of these (2.6%). Budesonide allergy was most often encountered, followed by hydrocortisone, tixocortol pivalate and hydrocortisone-17-butyrate. Betamethasone valerate, triamcinolone acetonide and clobetasol propionate rarely caused contact allergy. The corticosteroid allergy was of current relevance in about one third of the cases. Corticosteroid contact allergy is an uncommon adverse effect, in relation to the number of patients with inflammatory skin diseases who are treated with topical corticosteroids. In patients with longstanding eczematous skin disease, who do not improve or deteriorate during topical corticosteroid therapy, contact allergy to these drugs should be suspected and relevant patch tests should be performed to sort out concomitant reactions. Future treatment with corticosteroids must take into account possible cross-reactions.

Administration, Topical↗
PubMed1993

[Laparoscopic cholecystectomy].

Forty-one patients with uncomplicated gall stone disease were laparoscopied with the object of cholecystectomy. The procedure was accomplished in 36 patients, but the operation had to be transformed to a conventional open operation in five: Fibrosis made dissection of the gall bladder hazardous in four and bleeding during the procedure made immediate laparotomy necessary in one patient, whose postoperative course was uneventful. The median operating time was 100 minutes, range was 60-250 minutes. The only operative complication was bleeding from a trocar puncture hole on the first postoperative day which stopped spontaneously in one patient. Eighteen were sent home on the first postoperative day and 12 patients on the second day. Peroperative cholangiography was performed employing the Olsen-Reddick cholangiography forceps. We have designed a special catheter, which greatly facilitates the procedure. The procedure was accomplished in 27 of 32 planned cases. Two patients had common bile duct or common hepatic duct stones. A trans-sphincteric endoprosthesis was applied through the cholangiography forceps in both patients, to prevent postoperative bile duct outlet obstruction. The endoprosthesis made the following endoscopic sphincterotomy, which was performed at a convenient time rapid and safe. The stones were extracted and the prosthesis removed on the same occasion. A reliable flushing system was developed on the basis of the "Kidde" automatic tourniquet frequently used in orthopaedic surgery. All patients were seen in the outpatient clinic 1 month after the operation. Superficial infection in the trocar holes in ten patients were the only problem the patients had encountered and all had returned to their normal work.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1992

Cyclic AMP-and beta-agonist-activated chloride conductance of a toad skin epithelium.

1. The control by intracellular cyclic AMP and beta-adrenergic stimulation of chloride conductance was studied in toad skin epithelium mounted in a chamber on the stage of an upright microscope. Impalement of identified principal cells from the serosal side with single-barrelled conventional or double-barrelled Cl(-)-sensitive microelectrodes was performed at x500 magnification. For blocking the active sodium current 50 microM-amiloride was present in the mucosal bath. 2. When clamped at transepithelial potential difference V = 0 mV, the preparations generated clamping currents of 0.9 +/- 1 microA/cm2 (mean +/- S.E.M.; number of observations n = 55). The intracellular potential of principal cells (Vb) was -96 +/- 2 mV with a fractional resistance of the basolateral membrane (fRb) of 0.016 +/- 0.003 (n = 54), and an intracellular Cl- activity of 40 +/- 2 mM (n = 24). 3. At V = 0 mV, serosal application of a cyclic AMP analogue, dibutyryl cyclic AMP (500 microM) or a beta-adrenergic agonist, isoprenaline (5 microM) resulted in a sixfold increase in transepithelial Cl- conductance identified by standard 36Cl- tracer technique. 4. The clamping current at V = 0 mV was unaffected by cyclic AMP (short-circuit current Isc = 0.1 +/- 0.3 microA/cm2, n = 16) indicating that subepidermal Cl(-)-secreting glands are not functioning in our preparations obtained by collagenase treatment. 5. Cyclic AMP- or isoprenaline-induced chloride conductance (Gcl) activation (V = 0 mV) was not reflected in membrane potential and intracellular Cl- activity in principal cells. Intracellular chloride activity was constant at approximately 40 mM at membrane potentials between -90 and -100 mV. Therefore, it can be concluded that the principal cells are not contributing to activated Cl- currents. 6. At V = -100 mV where the voltage-dependent chloride conductance of mitochondria-rich (MR) cells was already fully activated, GCl was unaffected by cyclic AMP or isoprenaline. The major effect of these treatments was a rightward displacement of the MR cell-generated GCl-V relationship along the V axis. 7. Our results indicate that the beta-adrenergically controlled cyclic AMP-mediated chloride conductance is localized to the mitochondria-rich cells.

Animals↗