1.Investigation of the Characteristics of Orally Disintegrating Film Formulation
Masahiro Nakayama ; Masashi Hamada ; Kayo Fukatsu ; Muneo Kadobayashi ; Masako Ohno ; Satoko Katsuragi ; Manabu Amano ; Masahiro Moriyama
Japanese Journal of Drug Informatics 2015;17(1):11-14
Objective: In Japan, to prevent an increase in medical expenditure associated with development of super-aging society, the use of generic drugs is being promoted. To help patients financially and meet their various other needs, generic drugs (e.g., orally disintegrating film formulations) whose dosage forms do not exist for original drugs are manufactured and distributed. In this study, to evaluate the characteristics of an orally disintegrating film formulation, we performed dissolution, disintegration, and simulated intraoral tests of Amlodin® tablets 2.5 mg, Amlodin® OD tablets 2.5 mg, and Amlodipine OD film 2.5 mg that were manufactured by TEVA-KOWA PHARMA Co., Ltd.
Methods: Dissolution and disintegration tests were performed in line with the Japanese Pharmacopoeia, Sixteenth Edition, and the dose of amlodipine was determined by high-performance liquid chromatography. During the simulated intraoral test, the tested drugs’ disintegration in purified water and artificial saliva was observed macroscopically, and recorded using a digital camera.
Results: Since the each formulation showed an over 85.0% rate of dissolution 15 min after the initiation of the dissolution test, no difference was found in elution behavior. Also, in the simulated intraoral test, the film formulation began to disintegrate the earliest (2 and 10 min when using purified water and artificial saliva, respectively) among the tested drugs.
Conclusion: Our findings suggest that orally disintegrating film formulations show superior disintegration to uncoated or orally disintegrating tablets, and benefits on taking medicine was observed.
2.Status of Self-Medication with OTC Drugs by International Students
Masahiro Murakami ; Satoko Katsuragi ; Kana Yukihiro ; Masako Ohno ; Manabu Amano ; Masahiro Moriyama
Japanese Journal of Drug Informatics 2015;17(3):133-139
Objective: Along with the globalization of the Japanese economy, the number of international students in Japan has gradually increased. Under these circumstances, international students to visit pharmacies for self-medication are expected to increase. Thus, we carried out a questionnaire survey on international students conducting self-medication using non-prescription drugs, and examined its problem.
Method: To clarify the status of self-medication using OTC drugs by students studying abroad, multiple-choice and free description-style questionnaire sheets written in Japanese or English were distributed to 30 international students based in Kobe City. The sheets were independently completed by the students, excluding those who had difficulty in sufficiently comprehending the questions and required the researcher’s oral explanations for assistance.
Result: While 90.0% of the respondents answered that they occasionally use non-prescription drugs in their own countries, only 60.0% answered that they had experience of purchasing the drugs in Japan. When purchasing OTC drugs, 15.2% faced
Conclusion: These results revealed a tendency for international students to purchase OTC drugs following pharmacists’ advice less frequently in Japan than in their home countries despite their literacy difficulties. In the future, we hope to examine issues such as possible active communication by pharmacists and the drugstore structure, so as to promote self-medication through purchasing drugs at Japanese pharmacies. As a result, we hope to contribute to making Japanese pharmacies more foreign user-friendly in a real sense.
3.Usability of Auxiliary Devices for Eye Drop Administration
Masahiro Murakami ; Yuri Miura ; Satoko Katsuragi ; Masako Ohno ; Manabu Amano ; Masahiro Moriyama
Japanese Journal of Drug Informatics 2015;17(3):140-144
Objective: For pharmacists to select a suitable auxiliary device for eye drop administration for patients who have difficulty in applying eye drops, the pharmacists need to know the characteristics and level of difficulty of using each device.
Methods: Thus, we compared the characteristics of New Rakuraku Tengan, Rakuraku Tengan III, and an eye-drop self-help device and also conducted a survey involving 40 healthy volunteers on each device’s accessibility and suitability for people with motor disabilities.
Results: New Rakuraku Tengan received the highest score for “usage was able to easily understand” (70.0% of the respondents answered positively) and “suitability for poor-sighted people” (65.0%). Rakuraku Tengan III received the highest score for the “effectiveness of photos and illustrations in the manual” (77.5%),but was evaluated to be difficult to use. The eye-drop self-help device received the highest score for “suitability for people with difficulty raising their shoulders and arms” (75.0%).
Results: Thus, we observed the need for pharmacists to have thorough knowledge of the products in order to recommend suitable auxiliary devices for eye drop administration for each patient.
4.A Case of Intraoperative Acute Aortic Dissection during Mitral Valve Plasty.
Masahiro Ueno ; Yukinori Moriyama ; Yoshifumi Iguro ; Koichi Hisatomi ; Riichiro Toda ; Hitoshi Matsumoto ; Akira Kobayashi ; Goichi Yotsumoto ; Yoshihiro Fukumoto ; Akira Taira
Japanese Journal of Cardiovascular Surgery 2000;29(1):29-32
A 74-year-old man undergone mitral valve plasty. After cessation of cardiopulmonary bypass, bleeding persisted from the cardioplegia injection site and dilatation of the ascending aorta with discoloration was observed. The diagnosis of type A aortic dissection extending to the descending aorta was made by transesophageal echocardiogram. Replacement of the ascending aorta was performed under deep hypothermic circulatory arrest. The postoperative course was uneventful. The false lumen of the aortic arch and descending aorta was thrombosed completely on postoperative computed tomography. Intraoperative aortic dissection is a rare but fatal complication of cardiopulmonary bypass. Prompt recognition and appropriate surgical management are of prime importance.
5.Vibration sensation associated with motor function has specific frequency characteristics in community-dwelling older Japanese adults
Daisuke HASEGAWA ; Norio HOTTA ; Takashi MIZUTA ; Masahiro HOGURO ; Kaoru TODA
Japanese Journal of Physical Fitness and Sports Medicine 2023;72(4):305-313
Vibration sensation is related to motor function. However, it is unclear which vibration frequencies are associated with motor function. Therefore, in this cross-sectional study, we investigated whether a specific frequency of vibration sensation could explain motor functions. Thirty-two community-dwelling Japanese healthy older adults aged 70 years or older participated in the present study. Grip strength, one-leg standing time, and 10-m walking time were evaluated as indicators of motor function. Vibratory (40, 128, and 256 Hz) and tactile sensory tests were examined as sensory functions. Grip strength per body weight was significantly correlated with sex, body mass index, falls efficacy scale, vibration sensation with 40 and 128 Hz, and 10-m walking time (P < 0.05). Furthermore, one-leg standing time showed a correlation between vibration sensation (128 and 256 Hz) and fall history (P < 0.05). However, 10-m walking time was significantly correlated with only the grip strength to body weight ratio. Multiple regression analysis showed that vibration sensation with 128 Hz (β = 0.427) and sex (β = -0.335) (P < 0.05) were significant independent variables associated with grip strength to body weight ratio. Vibration sensation with 256 Hz (β = 0.465) and age (β = -0.343) (P < 0.05) were significant independent variable associated with one-leg standing time. No significant variables were identified for the 10-m walking time. Vibration sensation associated with motor function shows specific frequency characteristics in community-dwelling older Japanese adults.
6.A Case of a Super-Elderly Patient Who Underwent Total Arch Replacement Using the Frozen Elephant Trunk Technique for a Thoracic Aortic Aneurysm with a Right-Sided Aortic Arch
Takashi KATO ; Hirotsugu FUKUDA ; Wataru MORIYAMA ; Masataka OHASHI ; Shotaro HIROTA ; Masahiro SEKI ; Masahiro TEDUKA ; Yusuke TAKEI ; Hironaga OGAWA ; Ikuko SHIBASAKI
Japanese Journal of Cardiovascular Surgery 2021;50(5):317-321
The case is that of a 90-years-old man. A previous doctor performed abdominal graft replacement for an abdominal aortic aneurysm 5 years earlier and continued outpatient CT follow-up. Follow-up CT showed the right aortic arch and dilation of the thoracic aortic aneurysm, and the patient was referred to our hospital. Contrast-enhanced CT showed an aortic arch aneurysm ; the aneurysm diameter was 62 mm in major axis and 60 mm in minor axis, which was judged to be suitable for surgery. It was a rare right-sided aortic arch with no congenital heart malformation and no situs inversus. Endovascular treatment was considered because he was 90 years old and very elderly, but there were concerns about the risk of embolism, irregular manipulation and central landing. For the surgical method, we selected total arch replacement using a frozen elephant trunk technique. We succeeded in avoiding serious complications by selecting an appropriate treatment method through careful evaluation.