Search PubMed⌕ Search

Biomedical subjects

Y Shimada

Publications and source records attributed to Y Shimada.

At least 703 records · Page 39Linked to original sources

[Fundamental study on ceftizoxime suppositories in adults and children].

The pharmacokinetics of newly developed ceftizoxime suppository (CZX-S) was studied in healthy volunteers and in children, compared with that of intramuscular CZX and intravenous CZX: In 8 volunteers (aged 19 to 24 years), each of 500 mg (potency) CZX-S containing 3%, 4% and 5% sodium caprate was compared with 500 mg intramuscular CZX and 500 mg intravenous CZX as a single administration in the cross-over method. In addition each of 500 mg CZX-S containing 4% and 5% sodium caprate was studied in 2 groups of 8 volunteers (aged 22 to 24 years) and of 8 volunteers (aged 19 to 27 years); each CZX-S was given 3 times a day successively for 5 days. The pharmacokinetics of 125 mg and 250 mg CZX-S, which contained 3% sodium caprate, were also evaluated as a single administration in 9 children (aged 6 years 4 months to 12 years 0 month) and in 11 children (aged 7 years 8 months to 12 years 4 months), respectively. The irritabilities of CZX-S were studied in all subjects who participated in this trial. The feeling of foreign body, the feeling of defecation, the burning sensation and the pain were evaluated in volunteers; the feeling of defecation and the pain were evaluated in children. The results were as follows: I. Pharmacokinetics in healthy volunteers 1. Given as a single administration The mean peak concentrations of serum CZX were occurred 30 minutes after 500 mg CZX-S containing 3%, 4% and 5% sodium caprate, which were 10.5 mcg/ml, 12.3 mcg/ml and 12.4 mcg/ml, respectively. These values were 1.35 mcg/ml, 1.60 mcg/ml and 1.69 mcg/ml at the conversion unit of 1 mg dose per 1 kg body weight. The mean peak serum CZX concentration of CZX-S containing 3% sodium caprate was slightly lower than that of CZX-S containing 4% or 5% sodium caprate, but was 1.9 times higher than that of the ABPC suppository. There was no marked difference among 3 preparations of CZX-S in mean Tmax and T1/2. Cmax of CZX-S containing 3% sodium caprate was 1.40 mcg/ml at the conversion unit of 1 mg/kg. AUC of CZX-S containing 3% sodium caprate was slightly smaller than that of CZX-S containing 4% or 5% sodium caprate, but 3.1 times that of the ABPC suppository in healthy volunteers. When 500 mg CZX was intramuscularly administered by one shot to 8 volunteers, Tmax was same as that of CZX-S or was slightly later.(ABSTRACT TRUNCATED AT 400 WORDS)

Adult↗

[Experimental and clinical trials of BRL 25000 (clavulanic acid-amoxicillin) granules in the field of pediatrics].

MICs of BRL 25000, a combination of a newly developed beta-lactamase inhibitor CVA and AMPC in the ratio of 1 to 2, were determined against a number of bacterial strains and compared with those of AMPC, CVA, CEX and CCL. The 98 bacterial strains tested included 2-S. aureus, 23-H. influenzae, 25-E. coli, 22-K. pneumoniae and 26-P. mirabilis. In pharmacokinetic studies, BRL 25000 medium granules were administered to groups of 3 male subjects, aged between 7 years 8 months and 9 years 5 months, at doses of 10, 15 and 20 mg/kg, 2 hours after a meal. The resultant serum and urine concentrations and drug recoveries were measured. Furthermore, BRL 25000 was administered to a total 43 patients (2-pharyngitis, 8-tonsillitis, 3-bronchitis, 2-pneumonia and 28-urinary tract infection) whom clinically evaluable. An average daily dosage of 45.3 mg/kg was given, in 3 or 4 divided doses, for a period of 8 days on average. Clinical and bacteriological effects as well as side effects were studied. In the microbiological studies on 98 clinical strains, including beta-lactamase negative bacteria, BRL 25000 showed MICs against the Gram-positive cocci (2-S. aureus) superior to the other 4 drugs at inoculum sizes of 10(8) and 10(6) cells/ml. For the Gram-negative bacilli, against H. influenzae at inoculum sizes of 10(8) and 10(6) cells/ml, BRL 25000 was inferior in the small MIC range but superior in the large MIC range to AMPC, and was superior to the other 3 drugs. Against E. coli at an inoculum of 10(8) cells/ml, BRL 25000 showed antibacterial activity next to AMPC and CCL whilst at an inoculum of 10(6) cells/ml, it was inferior in the small MIC range but superior in the large MIC range to AMPC and CEX and was inferior to CCL but superior to CVA. Against K. pneumoniae at an inoculum of 10(8) cells/ml, BRL 25000 was equal to AMPC, CVA and CEX but inferior to CCL, whilst at an inoculum of 10(6) cells/ml, it was inferior to CCL but superior to the other 3 drugs. Against P. mirabilis at inoculum sizes of 10(8) and 10(6) cells/ml, BRL 25000 was inferior in the small MIC range but equal or superior in the large MIC range to AMPC, and was superior to CVA and CEX.(ABSTRACT TRUNCATED AT 400 WORDS)

Administration, Oral↗

[Clinical trials of BRL 25000 (clavulanic acid-amoxicillin) granules on skin and soft tissue infections in the field of pediatrics].

BRL 25000 is a combination of a newly-developed beta-lactamase inhibitor clavulanic acid (CVA) and amoxicillin (AMPC) in the ratio of 1 to 2. The drug, as medium granules, was administered to a total of 92 pediatric patients, ranging in age from 1 month to 13 years and 2 months, with cutaneous/soft tissue infections (70 impetigo, 6 furuncle, 7 phlegmon, 6 abscess and 3 cases of lymphadenitis). It was found subsequently that 2 of the 70 impetigo cases had received topical antibiotic medication and these were excluded from clinical evaluation to give a total of 90 evaluable cases. The daily dosage of BRL 25000 ranged from 23.7 to 75.0 mg/kg, given in 3 or 4 divided doses (average 48.5 mg/kg) and the duration of treatment was for 3 to 13 days (average 6 days). Clinical isolates of S. aureus from the above cases were examined for beta-lactamase production and their susceptibility determined to the 5 antibiotics BRL 25000, AMPC, CVA, cephalexin (CEX) and cefaclor (CCL). The drugs' clinical effects on the various diseases, bacteriological effects and side effects were also studied. At an inoculum of 10(8) cells/ml, major MICs of BRL 25000, AMPC, CVA, CEX and CCL against 71 strains of S. aureus, including beta-lactamase negative ones, were 3.13 mcg/ml, 12.5 mcg/ml, 50 mcg/ml, 12.5 mcg/ml and 12.5 mcg/ml, accounting for 60.6, 38.0, 49.3, 38.0 and 43.7% of the strains respectively, whilst at an inoculum of 10(6) cells/ml, major MICs were 1.56 mcg/ml, 3.13 mcg/ml, 25 mcg/ml, 6.25 mcg/ml and 3.13 mcg/ml, accounting for 57.7, 33.8, 83.1, 50.7 and 54.9%, respectively. It was noted that all drugs tended to show smaller MIC values as the inoculum size was reduced to 10(6) cells/ml and that BRL 25000 showed the most potent antibacterial activity of all 5 drugs.(ABSTRACT TRUNCATED AT 400 WORDS)

Administration, Oral↗

[Basic and clinical trials of aztreonam in the field of pediatrics].

Serum and urinary concentrations and recovery rates of aztreonam (SQ26,776, AZT), a newly developed antibiotic, were studied for a total of 20 pediatric cases by one-shot intravenous injections of 10, 20 and 40 mg/kg to 3, 4 and 3 cases, respectively, and by intravenous drip infusion of 10, 20 and 40 mg/kg to 3, 4 and 3 cases for 1 hour, respectively. Clinical and bacterial effects of AZT were studied by administering 76.7 mg/kg per day on average for a total of 36 cases of tonsillitis (6), pneumonia (13), otitis media and pneumonia complication (1), pleurisy (1), sinusitis (1) and UTI (14). The above daily dose was given t.i.d. (9 cases) or q.i.d. (27 cases), by intravenous drip infusion for 30 minutes for one t.i.d. case and by one-shot intravenous injection for 7 days for the remaining 35 cases. Also, side effect and laboratory values were examined for 43 cases including 7 dropouts. Serum concentration of AZT in 10 pediatric cases were measured by dosing 10, 20 and 40 mg/kg by one-shot intravenous injection to 3, 4 and 3 cases, respectively. In every dosage group, the serum concentrations were highest 5 minutes after the intravenous injection with average values of 91.0, 174.0 and 175.3 mcg/ml, respectively. Dose response was observed between 10 mg/kg dose group and 20, 40 mg/kg dose groups, but it was not between 20 mg/kg group and 40 mg/kg group. This was considered to be attributable to the individual case-fluctuations in the 2 groups and to a high concentration case of 240.0 mcg/ml in the 20 mg/kg group. Half-life of each dosage group was 1.55, 1.65 and 1.93 hours. Serum concentrations of AZT in 10 pediatric cases at the dosage level of 10, 20 and 40 mg/kg for 3, 4 and 3 cases, respectively, by 1 hour intravenous drip infusion were highest at the end of the administration with average values of 95.7, 126.0 and 170.7 mcg/ml, respectively. There was a dose response among the 3 groups and the half-life of them were 1.02, 1.41 and 2.48 hours, respectively. A longer half-life of the 3rd group with 40 mg/kg administration than the other 2 groups was due to 1 particular case of 4.44 hours with unknown cause of such an exceptional extension.(ABSTRACT TRUNCATED AT 400 WORDS)

Adolescent↗

Time-dependent cytotoxic action of human recombinant alpha-interferon (Ro22-8181) in vitro and the sensitivity of various cultured leukemia and lymphoma cell lines to it.

The growth inhibitory activity of human recombinant leucocyte A interferon (Ro22-8181: alpha-interferon) against 23 human cultured cell lines derived from leukemias and lymphomas was measured quantitatively by regrowth assay. Daudi cells were the most sensitive to it. Two T-cell lines (RPMI-8402, HUT78), three B-cell lines (Raji, Ly16, A3/Kawakami), one non-T, non-B acute lymphoblastic leukemia (ALL) cell line (KOPN-1) and three myelomonocytoid cell lines (U937, THP-1, ML-1) were moderately or slightly sensitive. Although the levels of sensitivity of these cell lines were different, cells could be killed by the recombinant alpha-interferon. Morphological changes in the sensitive cells treated with it were decreases in mitosis, pyknosis and fragmentation of the cells. Thirteen other cultured cell lines were not sensitive. The results indicated that the growth inhibitory activity of recombinant alpha-interferon is not always cell lineage-specific. There were only three cell lines whose sensitivity, expressed by the concentration required for 90% growth inhibition, was less than the several hundred units per milliliter that has usually been obtained as blood levels in clinical trials. These three included one of 10 T-cell lines and two of seven B-cell lines; none of six non-T, non-B ALL and myelomonocytoid cell lines were that sensitive. Among virus-associated cell lines, only Epstein-Barr virus-associated B-cell lines were sensitive to the interferon; adult T-cell leukemia virus-associated T-cell lines were not sensitive. It was demonstrated that recombinant alpha-interferon has a time-dependent, but not a concentration-dependent cytocidal action, indicating that optimal therapeutic schedules of recombinant alpha-interferon for cancer may be daily long-term treatment, not single or short-term large-dose therapy.

Antineoplastic Agents↗

[Fundamental and clinical studies of aspoxicillin in the pediatric field].

Aspoxicillin (ASPC), a new semisynthesized penicillin, was administered to 20 children; by one shot intravenous injection in the doses of 10, 20 and 40 mg/kg to each of 3 children, and by intravenous drip infusion in the doses of 20 and 40 mg/kg over a period of 1 hour to 8 and 3 children, respectively, and the serum levels, urinary levels and recovery rates were determined. ASPC was administered to 1 patient with tuberculous pleurisy in the dose of 20 mg/kg by one shot intravenous injection, then the thoracic fluid level and serum level were determined. In addition, ASPC was administered to 3 children with tonsillitis, 3 with bronchitis, 40 with pneumonia, one each for pleuropneumonia, pleurisy, lung abscess, scarlet fever, staphylococcal scalded skin syndrome and purulent lymphadenitis and 2 with UTI (total 54 children), in the mean dose of 81.4 mg/kg/day t.i.d. (12 children) or q.i.d. (42 children) by one shot intravenous injection for 6 days on the average, and clinical effectiveness and bacteriological response were evaluated in these cases, and adverse reactions and abnormal laboratory findings were examined in the 60 cases which included 6 drop-out cases. After the administration of ASPC to 9 children; 10, 20 and 40 mg/kg to each of 3 children, by one shot intravenous injection, the mean serum levels reached to the peak of 58.4, 147.0 and 221.0 mcg/ml, respectively, in 5 minutes. The mean half-lives were 1.03, 1.01 and 1.23 hours, and the mean areas under the curve (AUCs) were 44.9, 94.1 and 192.9 mcg X hr/ml, respectively. A dose response was seen among the 3 dosage levels. After the administration of ASPC to 11 children; 20 and 40 mg/kg to 8 and 3 children, respectively, by intravenous drip infusion over a period of 1 hour, the mean serum levels reached to the peak of 58.2 and 114.0 mcg/ml, respectively, on completion of the administration. The mean half-lives were 1.22 and 1.09 hours, and the mean AUCs were 109.4 and 181.7 mcg X hr/ml, respectively. A dose response was observed between the 2 dosage levels. In the above mentioned each 3 cases receiving one shot intravenous injection in the dose of 10, 20 and 40 mg/kg, the mean urinary levels of ASPC reached to the peak of 1,000.0, 2,300.0 and 4,350.0 mcg/ml, respectively, at 0 approximately 2 hours after the administration, and the urinary recovery rates during the first 6 hours were 66.1, 66.5 and 56.9%, respectively.(ABSTRACT TRUNCATED AT 400 WORDS)

Amoxicillin↗

[Influence of ceftriaxone on bacterial flora in human feces].

Ceftriaxone (CTRX), a newly developed antibiotic agent, was administered at 1,000 mg intravenously twice a day for 5 days to 7 healthy volunteers aged 21 to 26, weighing 61 to 79 kg (mean: 67.7 kg). The fecal bacterial flora was examined and the fecal level of CTRX was determined before, on 3 and 5 days after starting the administration, and on 3, 5 and 10 days after terminating the administration. At the same time, various bacteria isolated from the collected fecal specimens were studied for the sensitivity to CTRX, CEZ, CMZ and CTX. Adverse reactions and influence on various clinical laboratory parameters of CTRX were also examined. The results were as follows. Fecal bacterial flora: Enterobacteriaceae was at the level of 10(5) to 10(8) cells/g (mean: 10(7) cells/g) before starting the administration. The bacteria were detected from none of the 7 subjects on 5 days after starting the administration and on 3 days after terminating the administration. On 10 days after terminating the administration, the bacteria were detected in 6 out of 7 subjects at the level of 10(3) to 10(7) cells/g (mean: 10(7) cells/g). The level was the same as before starting the administration as a whole, but it had not been recovered to the initial level in any individual subject. With regard to other Gram-negative bacilli, P. aeruginosa which was isolated from none of the 7 subjects before starting the administration was detected at the level of 10(2) to 10(6) cells/g in 1 or 2 subjects on 3 days after starting, and on 3, 5 and 10 days after terminating the administration. Concerning Gram-positive bacteria, Staphylococcus sp. was isolated at the level of 10(3) to 10(4) cells/g in 3 subjects before starting the administration. The detection rate was decreased after starting the administration; it was detected in 2 and 1 subjects on 3 and 5 days after starting the administration, respectively, and in 1 subject on 3 days after terminating the administration. Then the detection rate was gradually increased; i.e., in 3 and 5 subjects on 5 and 10 days after terminating the administration, respectively. The level became gradually higher from on 5 days after terminating the administration than before starting the administration. Enterococcus sp. was isolated at the level of 10(5) to 10(8) cells/g (mean: 10(7) cells/g) in all of the 7 subjects before starting the administration. It was was detected in 1 and 4 subjects on 3 and 5 days, respectively, after starting the administration.(ABSTRACT TRUNCATED AT 400 WORDS)

Adult↗

[Fundamental and clinical studies on intravenous drip infusion of dibekacin in the pediatric field].

Dibekacin (DKB), an antibiotic of aminoglycoside group, was administered at 4 different dosages of 0.5, 1.0, 1.5 and 2.0 mg/kg as intravenous drip infusion taking 30 minutes or 1 hour. For each dose level, 3 cases each were used out of 24 boys from 1 year and 1 month to 14 years and 7 months of age, and serum concentrations as well as urinary concentrations and recovery rate were determined. After removed of 4 cases unassessable of therapeutic efficacy, 7 cases consisting of 1 case of chronic bronchitis, 1 case of lung abscess and 5 cases of urinary tract infections were treated with DKB at a mean daily dosage of 3.3 mg/kg in 2 or 3 divided doses as intravenous drip infusion taking 30 minutes or 1 hour. The mean treatment period was 7 days. The clinical and bacteriological results were analyzed in these cases and for analysis of side effects drop out cases were also included. The following results were obtained. Following 30 minutes intravenous drip infusion of DKB at 0.5, 1.0, 1.5 and 2.0 mg/kg, the serum concentration peaked at the end of infusion for all dose levels. The highest peak concentration of 9.17 mcg/ml was obtained for the dose level of 2.0 mg/kg. The highest dosage with which serum concentration does not exceed concentrations of 10 to 12 mcg/ml was found to be 2.0 mg/kg. The mean highest serum concentrations obtained were 1.65, 3.49, 5.40 and 8.67 mcg/ml for the dosages of 0.5, 1.0, 1.5 and 2.0 mg/kg, respectively, and the mean AUCs determined by the two-compartment model were 2.99, 6.04, 10.5 and 14.2 mcg X hr/ml, respectively, showing dose response relation in terms of peak concentration and AUC among groups. The mean T1/2 values for each dosage were 1.55, 1.54, 1.77 and 2.03 hours, respectively, with a longer tendency in T1/2 for the dose level of 2.0 mg/kg with unknown cause. When 0.5, 1.0, 1.5 and 2.0 mg/kg of DKB were infused taking 1 hour, the peak of serum concentration appeared also at the end of the infusion. The highest concentration was obtained with 2.0 mg/kg and it was 7.02 mcg/ml. Considering from the concentrations obtained for 0.5 mg/kg and 1.0 mg/kg groups the highest dosage at which the serum concentration does not exceed 10 to 12 mcg/ml was estimated to be 2.5 mg/kg.(ABSTRACT TRUNCATED AT 400 WORDS)

Adolescent↗

[Clinical trial of SM-4300 in the pediatric field].

SM-4300, a newly developed human immunoglobulin for intravenous use, was administered to 6 patients in the pediatric field. Two cases out of 3 cases with immunodeficiency syndrome were studied in terms of absorption and excretion of SM-4300 and all of them were observed effect of preventive bacterial infection. Three cases were administered combination therapy with SM-4300 and antibiotics. Two cases were pneumonia and 1 case was pleurisy. The following results were obtained. Two cases with immunodeficiency syndrome were observed serum levels of immuno gammaglobulin before and after administration of SM-4300. At 2-3 hours after the administration of SM-4300, the serum levels got to peak and the half-lives were 22.1 days and 22.6 days, respectively. The half-lives of SM-4300 were similar to plasmin or polyethylene glycol treated and sulfonated human immunoglobulin. The clinical effects of substitution therapy against 3 patients with immunodeficiency syndrome were observed. Through the administration of SM-4300 every 18 to 21 days for 6 months, 1 case was doing well. One case with chronic bronchitis and otitis media was hanging in the balance as well as she has been administered other immunoglobulin preparations. The last case didn't control the serum levels of immunoglobulin because he did not visit a hospital until incidence of infectious disease.

Adolescent↗

[Effect of aztreonam on bacterial flora in human feces].

Aztreonam (AZT), a new injectable monobactam antibiotic, was administered to 7 healthy male volunteers, aged 21-28 years (23 years, on average) and weighing 60.5-87.0 kg, (69.5 kg, on average) by one shot intravenous injection of 1,000 mg twice a day for 5 days. The effect of AZT on the fecal flora was studied 3 days before administration, on the day of the initiation, 3 and 5 days (end of the administration course) after the initiation, and 3, 5 and 10 days after the end of the administration. Fecal concentration of AZT was also studied. Also, fecal concentration and recovery rate of AZT in 4 healthy male volunteers aged 23-31 years (26 years, on average), weighing 59.5-70.5 kg (65.6 kg, on average) were measured by injecting 1,000 mg of AZT by intravenous injection only one time. Susceptibility of the bacteria isolated from the 7 cases receiving consecutive dosage to AZT, cefmetazole (CMZ), latamoxef (LMOX), cefoperazone (CPZ) and ceftazidime (CAZ) as well as side effect and laboratory values were examined with the following results. In the fecal flora, the population of Enterobacteriaceae on average was 10(7) cells/g feces on the day of the initiation and decreased by 2 logarithms to 10(5) cells/g 3 days after the initiation, 10(5) cells/g feces 5 days after the initiation with no bacterial isolation in 2 cases, 10(7) cells/g feces on 3 and 5 days after the end of administration respectively with recovery of the population to the average population on the day of the initiation. However, it increased 10 days after the end of administration with the population of 10(9) cells/g feces due to the isolation of one 10(10) cells/g feces, which was an increase by 2 logarithms as compared with average population before the administration. It was also higher than the average population 3 days before the initiation of administration. Temporal decrease or disappearance of the bacteria were noted by the administration of AZT. As to other cases of Gram-negative bacilli, Pseudomonas sp. was detected from only 2 cases 3 days before the initiation of administration and on the day of the initiation, but there was an increase to 4 and 5 cases 3 and 5 days after the initiation respectively. Number of isolation returned to 2 cases, 3, 5 and 10 days after the end of administration respectively and it was same as the number before the initiation of administration.(ABSTRACT TRUNCATED AT 400 WORDS)

Adult↗

Distribution of polymorphic forms of troponin components in extra- and intrafusal fibers of an avian slow muscle.

By indirect immunofluorescence microscopy, the reactivities of extra- and intrafusal muscle fibers with antibodies against troponin (TN) components were studied in an avian slow muscle, the anterior latissimus dorsi (ALD) of the chicken. Serial cross sections of the muscle were exposed to antibodies specific to TN components (TN-T, -I, and -C) from adult chicken breast and ventricular muscles. In extrafusal fibers, four distinct categories were identified on the basis of differential reactivity with these antibodies. The predominant population of fibers (greater than 95%) reacted weakly only with antiventricular TN-C. The second type of fibers (less than 5%) was stained with antibodies raised against breast TN components. The third group of fibers (less than 1%) was labeled not only with antibreast TN components, but also with antiventricular TN-T and -C. The last class of fibers (less than 1%) reacted with antibodies directed against ventricular TN-T and -C. These results were correlated with myofibrillar ATPase staining patterns of fibers. In intrafusal muscle fibers of this muscle, the same four types of fibers were observed; in these fibers, however, there appeared to be a longitudinal variation in the reactivity. In conclusion, the slow ALD muscle of the adult chicken contains populations of both extrafusal and intrafusal fibers which are heterogeneous in reactivity with TN component antibodies.

Adenosine Triphosphatases↗

Isoforms of troponin during regeneration of chicken skeletal muscle fibers after cold injury.

The regeneration of skeletal muscle fibers of the adult chicken was examined after a focal injury brought about with a liquid-nitrogen cooled brass rod. Immunofluorescence microscopy with antibodies specific for troponin (TN) components (T, I, and C) from adult chicken breast and ventricular muscles showed the presence of different fiber types in both the anterior and posterior latissimus dorsi muscles. New fibers produced in the regions adjacent to the site of injury in both muscles exhibited the same immunoreactivities as those previously seen in embryonic skeletal muscles. As differentiation proceeded, regenerating cells lost their embryonic antigenicities and recovered their characteristic adult reactivities. These results indicate that, during regeneration from cold injury, skeletal muscles apparently pass again through an embryonic stage during which they synthesize embryonic-like TN isoforms.

Animals↗

Perchloric acid treatment and use of chromogenic substrate in the Limulus test: application to veterinary diagnosis.

The Limulus test was carried out for endotoxin determination using a synthetic chromogenic substrate after perchloric acid(PCA) treatment to remove inhibiting substances in the blood. PCA treatment completely removed non-specific amidolytic activity and other factors which interfered with the Limulus test. The recovery of added endotoxin was about 100% irrespective of animal species. Endotoxin levels in PCA-treated blood plasma of healthy domestic animals were invariably below 1 pg ml-1. Many of the cows with gangrenous mastitis, from which Gram-negative rods were isolated, showed high endotoxin levels ranging from 22.8 to 138.0 pg ml-1. Endotoxin was also detected in the blood of cows affected with salmonellosis, colibacillosis, Haemophilus somnus infection and urethritis associated with Proteus.

Animals↗

Electromyography of the external urethral sphincter in patients with prostatic hyperplasia.

We analyzed quantitatively the action potential of external urethral sphincter muscles by electromyography in 9 patients with benign prostatic hyperplasia and in 13 patients without micturition disturbances. In patients with benign prostatic hyperplasia the motor unit potentials had a mean amplitude of 290 plus or minus 40 microV., duration 5.0 plus or minus 0.1 msec. and phases 3.9 plus or minus 0.1. The control group values were 310 plus or minus 20 microV., 5.5 plus or minus 0.1 msec. and 3.8 plus or minus 0.1, respectively. There was a significant difference in duration, which was probably due to the difference in age of the 2 groups. An inverse relationship between age and duration was proved in the patients examined.

Action Potentials↗