Immunoinhibition and automated column chromatography compared for assay of creatine kinase isoenzyme MB in serum

We examined sera from six different groups of patients for CK-MB activity by means of two commercially available tests, an immunoinhibition method (E. Merck) and the CK-MB test as used with the aca (Du Pont). In the first group of patients (suspicion of myocardial infarction) the correlation between the two methods was good: r = 0.9191, y = 1.068x -- 0.888, x = 18.7 U/L, y = 19.0 U/L. In the second group, patients with high adenylate kinase activity, no interference was detectable on the aca, whereas the immunoinhibition method yielded falsely high CK-MB values. The third group consisted of persons with macro-CK-BB in their serum. In the immunoinhibition test these patients usually showed a high CK-MB:total CK ratio, whereas such results were rarely found for the aca. The fourth group, patients with a different electrophoretic mobility of their CK-isoenzymes (migration of an active band towards the cathode), were detected by the immunoinhibition method (high ratio of CK-MB to total CK), but not with the aca. In the presence of free CK-BB (group five) the immunoinhibition test resulted in "falsely" high CK-MB values, whereas CK-BB was retained on the column of the aca. In skeletal muscle diseases (group six) results by the two methods differed, values for CK-MB on the aca being much higher. It was demonstrated experimentally that this was due to CK-MM with altered surface charge.

Immunoinhibition and automated column chromatography compared for assay of creatine kinase isoenzyme MB in serum

We examined sera from six different groups of patients for CK-MB activity by means of two commercially available tests, an immunoinhibition method (E. Merck) and the CK-MB test as used with the aca (Du Pont). In the first group of patients (suspicion of myocardial infarction) the correlation between the two methods was good: r = 0.9191, y = 1.068x -- 0.888, x = 18.7 U/L, y = 19.0 U/L. In the second group, patients with high adenylate kinase activity, no interference was detectable on the aca, whereas the immunoinhibition method yielded falsely high CK-MB values. The third group consisted of persons with macro-CK-BB in their serum. In the immunoinhibition test these patients usually showed a high CK-MB:total CK ratio, whereas such results were rarely found for the aca. The fourth group, patients with a different electrophoretic mobility of their CK-isoenzymes (migration of an active band towards the cathode), were detected by the immunoinhibition method (high ratio of CK-MB to total CK), but not with the aca. In the presence of free CK-BB (group five) the immunoinhibition test resulted in "falsely" high CK-MB values, whereas CK-BB was retained on the column of the aca. In skeletal muscle diseases (group six) results by the two methods differed, values for CK-MB on the aca being much higher. It was demonstrated experimentally that this was due to CK-MM with altered surface charge.

Agiolax bolus in the esophagus. Report of two cases

Two cases of intermittent obstruction of the esophagus by the laxative Agiolax, proven by endoscopy and barium swallow, are described. The patients took an overdose of one and two tablespoons of Agiolax, respectively; they had no disorders of the esophagus. Symptoms of obstruction subsided spontaneously after 24 and 36 hours respectively.

[Distraneurin (Chlormethiazol) as an anaesthetic for high-risk cases in ophthalmology (author's transl)]

A new anaesthesia, through Chlormethiazol i.v. is described, which is especially used in cataract (lens) operations. There is no excitation during induction and the depth of anaesthesia (stage) depends on dosage-time ratio. Recovery is calm without undesirable side-effects. The intraocular pressure is significantly diminished during anaesthesia.

Evaluation of a new method for the intragastric titration of gastric juice

A new method for the intragastric titration of hydrochloric acid with a pH sensitive telemetric antimone electrode connected via a receiver to an electronic trigger, which regulates a pump for the inflow of 1 M KHCO3 solution, was evaluated in 22 achlorhydric patients by a series of intragastric instillations of 0.1 N HCl. In vitro this procedure presented a high precision (r = 0.99). Under in vivo conditions a significant correlationship (r = 0.84, p = 0.001) between the input of hydrochloric acid and bicarbonate in a range from 1.4 to 16.7 mEq/30 min could be established in non-operated subjects. The average coefficient of variation was 34%. In subjects with partial gastrectomy (Billroth II) overtitration of 100% (y = 2.1 x -1.7, r = 0.78, p = 0.001) was recorded, suggesting an increased loss of bicarbonate related to the accelerated gastric evacuation.