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Biomedical subjects

E Laurikainen

Publications and source records attributed to E Laurikainen.

60 records · Page 4Linked to original sources
PubMed1980

Plasma concentrations of lidocaine (lignocaine) after cranial subcutaneous injection during neurosurgical operations.

After cranial subcutaneous injection of lidocaine 0.8-3.7 mg/kg+adrenaline (epinephrine) 1:200,000 in neurosurgical patients, fast drug absorption was found with peak plasma concentrations of 0.6-1 microgram/ml in 5-10 min. However, the concentrations remained above the lowest effective antiarrhythmic level of 0.6 microgram/ml for only about 10 min. In one patient, simultaneously administered intravenous lidocaine had an additive effect on those levels. Induced hypotension (sodium nitroprusside) during aneurysm operations decreased the arterial plasma level of lidocaine and was followed by a new peak after discontinuation. Thus the absorption of a drug during induced hypotension from subcutaneous tissue is often erratic.

Adult↗
PubMed1979

Plasma lidocaine concentrations after different methods of releasing the tourniquet during intravenous regional anaesthesia.

Different methods of tourniquet release have been proposed to decrease the concentrations of local anaesthetic released into the systemic circulation at the end of intravenous regional anaesthesia. The effect of releasing the tourniquet intermittently with 5 seconds (group I) and 30 seconds (group II) deflation periods or at once (group III) was studied in 25 adult patients after intravenous regional anaesthesia with 40 ml of 0.5% lidocaine. The venous plasma lidocaine concentrations from the contralateral arm were measured by gas chromatography. There was no leakage of lidocaine from the occluded arm into the systemic circulation. The mean maximum plasma lidocaine concentration in group I 1.99 +/- 1.45 (SD) microgram/ml, in group II 1.33 +/- 0.54 microgram/ml and in group III 1.56 +/- 0.88 microgram/ml (P greater than 0.05) was below the toxic concentrations reported in the literature. There were subjective complaints such as dizziness and ringing in the ears in 4 out of the 7 patients in group I, in 2 out of the 9 patients in group II and in one of the 9 patients in group III (P greater than 0.05). There was no correlation between the duration of tourniquet time (range 12-87 minutes) and the maximum plasma lidocaine concentration. The intermittent release of the tourniquet did not decrease the venous plasma lidocaine concentrations in the contralateral arm; neither did comparing the lidocaine pharmacokinetics in 5 patients of group II after tourniquet release and in the 5 healthy volunteers after a single 100 mg intravenous lidocaine injection reveal any differences.

Adult↗
PubMedDate not supplied

Peritonsillar abscess associated with infectious mononucleosis.

Infectious mononucleosis (IM) is characterized as a viral disease; thus, no antibiotic treatment is recommended. However, some of these patients tend to develop a long-lasting, painful disease, which can be relieved by antibiotic administration. Due to this bed-side knowledge, we re-evaluated 928 patients with peritonsillar abscess (PA), treated during a 5.5-year period in the Department of Otorhinolarygology of Turku University Central Hospital. Of these patients 15 (1.6%) also had infectious mononucleosis (IM). During this period, 64 patients with severe pharyngeal IM were treated in our department and thus the proportion of PA in patients with IM was 23.4%. A control of 15 age- and sex-matched patients with PA but without mononucleosis was formed in order to evaluate the possible differences in patient history, clinical symptoms and findings. Such differences were small and did not affect the chosen treatment of PA, abscess tonsillectomy. There was no peri- or postoperative difference in complications or recovery, but the hospitalization time was longer in IM patients with PA (3.1 days) than in patients with PA only (2.4 days). IM patients referred to ENT departments make a special group of patients, who may also need surgical treatment.

Adolescent↗
PubMedDate not supplied

Radical meatoplasty in the treatment of severe chronic external otitis.

In the beginning, external otitis is an inflammation of the skin of the external ear canal. Partial or total obliteration of the meatus causes cleaning problems, which worsen the obliteration, and hence, the infection. Immunosuppressive medication or illness, certain dermatological problems or frequent infections may lead to irreversible changes and to the malignant form of external otitis with life-threatening sequelae. Conservative treatments in the beginning are aimed at regaining the normal skin functions by helping the cleaning process and curing the acute infection with repeated irrigation, proper antibacterial medication and corticosteroids and anti-inflammatory analgesics. In rare prolonged cases, surgical procedures are needed to help the cleaning process by removing the irreversibly thickened skin and bone affections, and using grafts. On the basis of our experience, even the removal of the diseased skin and enlarging of the external ear canal are insufficient procedures in the most difficult cases. In the present paper, we describe a new surgical method that we have performed to treat chronic bilateral obliterative external otitis in 2 patients, with favorable results.

Anti-Infective Agents↗