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Biomedical subjects

H Yazima

Publications and source records attributed to H Yazima.

9 recordsLinked to original sources
PubMed2001

Mandibular reconstruction using a vascularised fibula osteocutaneous flap in a patient with pyknodysostosis.

We present the first successful report of mandibular reconstruction using a free fibula osteocutaneous flap in a patient with pyknodysostosis. The patient had recurrent refractory osteomyelitis of the mandible, which was initially treated with resection and reconstruction using an AO plate. Recurrent fistula formation with loosening of the plate was treated by radical re-excision and reconstruction with a free fibula flap. The postoperative course was uneventful; at 14 months the bony union was almost complete, without resorption or atrophy of the grafted fibula on radiography.

Adult↗
PubMed1994

[The significance of six sextant biopsy for prostate cancer].

The significance of six sextant ultrasound guided biopsies of the prostate (SS-biopsy) was evaluated in a total of 114 patients. The presence of prostate cancer was suspected (Pca) in 59 subjects through mass screening (MS) for Pca and in 47 patients in out-patient clinics (OPC). The recurrence (REC) was suspected in 3 patients diagnosed previously as Pca. All of them had elevated PSA, abnormal digital rectal examination (DRE) and/or abnormal transrectal ultrasonography (TRUS). All of these tests in 5 patients with benign prostate hypertrophy (BPH) were normal. Moreover, in 34 patients among them, oriented biopsies were performed to the area where Pca was suspected by DRE and or TRUS. Twelve Pca patients were detected in MS group (20.3%), 17 Pcas in OPC group (36.2%) and 3 Pcas in REC group (100%). No Pca patients were detected in BPH group. In 12 Pca patients with T1 or T2, only one Pca patient (8.3%) had over 3 Pca samples among the samples obtained by SS-biopsy. In 20 patients with T3 or T4, 13 patients (65%) had over 3 Pca samples. There was significant relationship between T category and Pca sample numbers among 6 samples obtained by SS-biopsy (p < 0.01). Ten of 12 Pca patients in MS group (83.3%) and 8 of 17 patients in OPC group (47.1%) had less 3 Pca samples. Pca was detected in 9 of 34 patients examined by the oriented biopsy. However al of these Pca were detected by SS-biopsy. It may be not necessary to examine Pca suspected patients by the oriented biopsy if they were examined by this SS-biopsy.(ABSTRACT TRUNCATED AT 250 WORDS)

Biopsy↗
PubMed1994

[Concentrations of new quinolone agents in serum and prostate tissue].

Twenty five patients with benign prostate hypertrophy were administered ofloxacin (OFLX) simultaneously with norfloxacin (NFLX) in 6 patients, ciprofloxacin (CPFX) in 10, tosfloxacin (TFLX) in 5 and enoxacin (ENX) in 4 patients. The dose of these new quinolones was 100 mg (except 150 mg of TFLX). Their concentrations in the serum and the prostate tissue were measured by high performance liquid chromatography (HPLC). The serum concentration of OFLX was significantly higher than that of NFLX, CPFX, TFLX or ENX. The prostate tissue concentration of OFLX was significantly higher than that of CPFX or TFLX. The ratio of tissue versus serum concentration of each new quinolone agent was not significantly different. The high OFLX tissue concentration appeared to be caused by the high serum concentration.

4-Quinolones↗
PubMed1993

[Measurement of serum PSA by DELFIA PSA kit and its application for mass screening. The Gunma Urological Oncology Study Group].

The significance of prostate specific antigen (PSA) measured by DELFIA PSA kit in the 1,177 serum samples examined by mass screening for prostate cancer was evaluated. All subjects were examined by questionnaire, digital rectal examination (DRE) and prostatic acid phosphatase (PAP) and the subjects in whom prostate cancer was suspected from abnormal DRE and/or elevated PAP were recommended to receive the secondary screening for the presence of prostate cancer. All serum specimens used for this study were kept in our serum bank. The cut-off value was investigated between non-cancer subjects (diagnosed as normal, voiding disturbance or BPH) and prostate cancer patients. When the cut-off value was 2.89 ng/ml, the sensitivity, specificity and accuracy as prostate marker was 80.6%, 90.0% and 89.4%, respectively. Therefore, the cut-off value was determined as 3.0 ng/ml. The significance of PSA was retrospectively evaluated compared to PAP in the subjects examined by our mass screening. Twenty eight of the 39 palpable prostate cancers which could not be detected from the PAP level were detected from the PSA level, namely the sensitivity of the detection using the PSA level is more excellent than that using PAP. However, the false negative rate obtained using PSA was high (30.3%) in the patients with stage B disease. The relationship among serum PSA concentration, prostate size estimated by DRE and age was investigated. PSA was increased with age and prostate size. This estimation should be confirmed by using an ultrasonography because the prostate size obtained by DRE is inaccurate as compared with that obtained by ultrasonography.

Adult↗
PubMed1979

Computer analyses of Rohrer's coefficients.

In the field of respiratory physiology computers have been used for theoretical and automatic analyses of the test results. The purpose of this paper is to clarify whether computers are available in measurement of the nasal resistance. The nasal cavities, simulated by an acryl resin model, were ventilated at various volumes and speeds. The pressure and flow changes were recorded by a data recorder and analyzed by a minicomputer according to the prescribed situations. Rohrer's formula P = K1V+K2V2 and its modification R = K1+K2V were used for calculation of K1 and K2. The calculated values differed significantly when sampling was made on a particular part of the respiratory excursion or sampling time was extraordinarily prolonged. They were also different from the ordinary values when too slow or too rapid ventilatory speed was applied. It was concluded that more than twenty samplings were necessary at regular intervals in a normal inspiratory or expiratory phase. Too slow and too rapid respiration should be avoided because of functional limitations of the measuring apparatus.

Airway Resistance↗