Background: Bone marrow aspiration is an essential but hazardous procedure. We have developed a mannequin simulator with posterior iliac crests to teach needle puncture.
Method: After watching a video demonstration of bone marrow aspiration, undergraduate medical students were asked to complete a questionnaire concerning their calmness （C） and self-confidence （S） in performing the procedure using 5-point rating scales （1–5: worst–best） and its estimated ease （E） （1-5: difficult–easy）. The students were given hands-on, small-group instruction using the simulator and allowed to practice, after which they were asked to answer the questionnaire again. The outcome was a change in scores between before and after practice. The paired Student’s t-test （two-tailed） was used for statistical analysis. We also evaluated correlations between pairs among 3 factors.
Results: The participants were 200 fifth-year student volunteers from Kawasaki Medical School. The scores after instruction and practice were higher than those before （C: 1.57±0.85 vs. 2.61±1.27; S: 1.61±0.85 vs. 2.86±1.01; and E: 2.36±1.13 vs. 3.65±1.11）. Estimated ease was moderately correlated with self-confidence in performing the procedure after instruction and practice, and the rank-correlation coefficients of before and after were 0.481 and 0.557, respectively. The coefficients of C and E before and after the instruction and practice were 0.346 and 0.526, respectively, whereas the coefficients S and C were 0.487 and 0.414, respectively.
Discussion: Simulator-based training may reduce medical students’ anxiety about bone marrow aspiration and its estimated difficulty.

Objective: Tocilizumab and infliximab are biologic drugs that are widely used for the treatment of rheumatoid arthritis (RA). The dosage of these injectable RA drugs is calculated based on body weight. However, injectable RA drugs are used only once due to stability and sterility concerns. For expensive biologic drugs, drug disposal wastage needs to be reduced. Tocilizumab is approved in three vial sizes: 80, 200, and 400 mg. In this study, we evaluated the validity of these tocilizumab vial sizes to help resolve the issue of excess residual drug.Methods: A log-normal distribution was assumed for body weight, and 10,000 hypothetical cases were created using the programming language R. We analyzed the average wasted dose rate per vial (%) by gender after considering different vial size combinations.Results: The average wasted dose rate per vial of tocilizumab was estimated to be 3.7% for males and 4.7% for females.Conclusion: The three vial sizes of 80, 200, and 400 mg are reasonable for tocilizumab. The average wasted dose rate per vial of infliximab was estimated to be 17.7% for males and 22.6% for females. The average wasted dose rate per vial was lower for tocilizumab than infliximab. Tocilizumab is administered in a dose range of 200 to 1,100 mg with three different vial sizes in multiples of 40 mg. However, infliximab is administered in a dose range of 50 to 400 mg with a single vial size of 100 mg. Multiple vial sizes should be prepared to ensure the efficient use of limited medical resources. It is also expected that the method employed for this hypothetical case model will be applied to other drugs for which disposal wastage is a problem and used to set appropriate vial size combinations.

Purpose: Patients who receive chemotherapy for colorectal cancer with the prophylactic dexamethasone (DEX) for antiemesis may experience an abnormal elevation in their casual blood glucose levels. The purpose of this study was to determine the frequency of such a DEX-induced elevation in patients with metastatic colorectal cancer, and to emphasize the importance of pharmaceutical care in improving the quality of life of patients. Methods: We retrospectively analyzed data from 50 patients who had received chemotherapy with or without DEX. Results: Of the 30 patients who received DEX, 8 exhibited abnormally high blood glucose levels (>200 mg/dl on more than 2 occasions); 3 of these patients also had diabetes mellitus. None of the 20 patients who did not receive DEX exhibited a remarkable elevation in the blood glucose levels. Conclusions: We confirm that patients receiving concomitant administration of DEX with chemotherapy may exhibit elevated blood glucose levels. Because an increase in the blood glucose levels may produce symptoms indicative of diabetes such as fatigue, appropriate pharmaceutical care for early detection of the abnormal elevation in the blood glucose levels may be important in preventing complications in such patients.

Objectives: This study evaluates the relationship between the various words expressing pain and the efficacy of opioid analgesics, in order to provide information on the appropriate selection of analgesic drugs for cancer pain relief. A new and simplified evaluation list for the assessment of pain, including the common words used to express pain, was developed accordingly. Methods: The words expressing pain were classified into three categories based on the Guidelines for Drug Therapy in Cancer Pain. These words were grouped into clusters according to the efficacy of opioid drugs, as expressed by the patients. On the basis of these results, an evaluation list was developed, and its validity was assessed by clinical pharmacists and cancer patients experiencing pain. Results: On the basis of the classification of the words, their relationship with opioid efficacy was summarized, and the results of the cluster analysis were found to be helpful for the development of a new pain evaluation list. Conclusion: Patients use various words to express their pain. By classifying and clustering these words according to the guidelines and the efficacy of opioid drugs, we proposed a practical pain evaluation list for appropriate selection of analgesic drugs in patients with cancer.

During the perioperative period after total hip arthroplasty (THA), much attention has been recently paid to deep venous thrombosis, yet there are few reports concerning stroke after THA and there is no such data at all in Japan at present. The purpose of this retrospective study was to elucidate the occurrence rate and the characteristics of stroke cases during the THA perioperative period. A total of 1,551 primary THAs performed between January 1999 and December 2008 were investigated. Cerebral infarction occurred in three patients (0.19%) during three weeks after THA. Concerning the related factors, one male had foramen ovale, one female had untreated diabetes and atrial fibrillation, and one female had severe stenosis of the internal carotid artery. Cerebral infarction occurred at Day 1 in one male, at Day 2 in one female, and at Day 5 in the other female, and they underwent anticoagulant therapy just after their diagnosis. In all three patients, motor paralysis fully improved and they came back to the THA rehabilitation program within Day 9. One male was discharged at 4 weeks, and another two females were discharged at 8 weeks. Because many people eating a more European diet are now getting older in Japan, prophylaxis for not only DVT but also stroke after THA should be emphasized.

The electrogenic sodium/bicarbonate cotransporter 1 (NBCe1) on the basolateral side of the renal proximal tubule plays a pivotal role in systemic acid-base homeostasis. Mutations in the gene encoding NBCe1 cause severe proximal renal tubular acidosis accompanied by other extrarenal symptoms. The proximal tubule reabsorbs most of the sodium filtered in the glomerulus, contributing to the regulation of plasma volume and blood pressure. NBCe1 and other sodium transporters in the proximal tubule are regulated by hormones, such as angiotensin II and insulin. Angiotensin II is probably the most important stimulator of sodium reabsorption. Proximal tubule AT(1A) receptor is crucial for the systemic pressor effect of angiotensin II. In rodents and rabbits, the effect on proximal tubule NBCe1 is biphasic; at low concentration, angiotensin II stimulates NBCe1 via PKC/cAMP/ERK, whereas at high concentration, it inhibits NBCe1 via NO/cGMP/cGKII. In contrast, in human proximal tubule, angiotensin II has a dose-dependent monophasic stimulatory effect via NO/cGMP/ERK. Insulin stimulates the proximal tubule sodium transport, which is IRS2-dependent. We found that in insulin resistance and overt diabetic nephropathy, stimulatory effect of insulin on proximal tubule transport was preserved. Our results suggest that the preserved stimulation of the proximal tubule enhances sodium reabsorption, contributing to the pathogenesis of hypertension with metabolic syndrome. We describe recent findings regarding the role of proximal tubule transport in the regulation of blood pressure, focusing on the effects of angiotensin II and insulin.
Acidosis, Renal Tubular ; Angiotensin II ; Blood Pressure* ; Diabetic Nephropathies ; Homeostasis ; Humans ; Hypertension ; Insulin ; Insulin Resistance ; Kidney Tubules, Proximal ; Plasma Volume ; Rabbits ; Rodentia ; Sodium ; Sodium-Bicarbonate Symporters

OBJECTIVE: To assess actual rates of late vaginal stenosis and identify predisposing factors for complications among patients with previously untreated cervical cancer following high-dose-rate brachytherapy. METHODS: We performed longitudinal analyses of 57 patients using the modified Dische score at 6, 12, 18, 24, 36, and 60 months after treatment, which consisted of 15 interstitial brachytherapys and 42 conventional intracavitary brachytherapys, with a median follow-up time of 36 months (range, 6 to 144 months). RESULTS: More than half of the patients developed grade 1 (mild) vaginal stenosis within the first year of follow-up, and grade 2 (97.5%, moderate) to grade 3 (severe) stenosis gradually increased with time. Actual stenosis rates for grade 1, 2, and 3 were 97.5% (95% confidence interval [CI], 92.7 to 97.5), 60.7% (95% CI, 42.2 to 79.3), and 7.4% (95% CI, 0 to 18.4) at 3 years after treatment. Pallor reaction grade 2-3 at 6 months was only a statistically significant predisposing factor for grade 2-3 late vaginal stenosis 3 years or later with a hazard ratio of 3.48 (95% CI, 1.32 to 9.19; p=0.018) by a multivariate Cox proportional hazard model. Patients with grade 0-1 pallor reaction at 6 months showed a grade > or =2 vaginal stenosis rate of 53%, whereas the grade 2-3 pallor reaction group achieved a grade > or =2 vaginal stenosis rate at 3 years at 100% (p=0.001). CONCLUSION: High-dose-rate brachytherapy was associated with high incidence of late vaginal stenosis. Pallor reaction grade 2-3 at 6 months was predictive of late grade 2-3 vaginal stenosis at 3 years after treatment. These findings should prove helpful for patient counseling and preventive intervention.
Adult ; Aged ; Aged, 80 and over ; Brachytherapy/*adverse effects/methods ; Constriction, Pathologic/etiology/pathology ; Female ; Humans ; Iridium Radioisotopes/therapeutic use ; Middle Aged ; *Pallor ; Prognosis ; Prospective Studies ; Radiopharmaceuticals/therapeutic use ; Retrospective Studies ; Uterine Cervical Neoplasms/*radiotherapy ; Vaginal Diseases/*etiology/pathology

A Valsalva aneurysm filled with thrombi can be difficult to diagnose, because it mimics a cardiac tumor. Both cardiac magnetic resonance imaging (MRI) and transesophageal echocardiogram (TEE) were performed on a patient who showed a low-echoic mass located between the atrial septum and the non-coronary sinus. Based on MRI findings allowing tissue characterization and the accurate location of the mass and the TEE findings of an irregular surface of the mass and a partial defect in the edge of the non-coronary sinus, we diagnosed the mass as a thrombosed Valsalva aneurysm that had perforated the inter-atrial septum. The operative findings coincided with the preoperative diagnosis. Both MRI and TEE are useful for diagnosing this condition.
Aneurysm ; Atrial Septum ; Echocardiography ; Heart Neoplasms ; Humans ; Magnetic Resonance Imaging ; Sinus of Valsalva