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Ibaraki, Japan

Ibaraki Prefectural University of Health science is a public university in the town of Ami, Ibaraki, Japan. The school was established in 1995. Wikipedia.

Mutsuzaki H.,Ibaraki Prefectural University of Health Sciences | Sakane M.,University of Tsukuba
Sports Medicine, Arthroscopy, Rehabilitation, Therapy and Technology | Year: 2011

Background: We developed a novel technique to improve tendon-bone attachment by hybridizing calcium phosphate (CaP) with a tendon graft using an alternate soaking process. However, the long-term result with regard to the interface between the tendon graft and the bone is unclear.Methods: We analyzed bone tunnel enlargement by computed tomography and histological observation of the interface and the tendon graft with and without the CaP hybridization 2 years after anterior cruciate ligament (ACL) reconstruction in goats using EndoButton and the postscrew technique (CaP, n = 4; control, n = 4).Results: The tibial bone tunnel enlargement rates in the CaP group were lower than those in the control group (p < 0.05). In the CaP group, in the femoral and tibial bone tunnels at the anterior and posterior of the joint aperture site, direct insertion-like formation that contained a cartilage layer without tidemarks was more observed at the tendon-bone interface than in the control group (p < 0.05). Moreover, the gap area between the tendon graft and the bone was more observed at the femoral bone tunnel of the joint aperture site in the control group than in the CaP group (p < 0.05). The maturation of the tendon grafts determined using the ligament tissue maturation index was similar in both groups.Conclusions: The CaP-hybridized tendon graft enhanced the tendon-bone healing 2 years after ACL reconstruction in goats. The use of CaP-hybridized tendon grafts can reduce the bone tunnel enlargement and gap area associated with the direct insertion-like formation in the interface near the joint. © 2011 Mutsuzaki and Sakane; licensee BioMed Central Ltd.

Iizuka M.,Ibaraki Prefectural University of Health Sciences
Advances in Experimental Medicine and Biology | Year: 2010

In this brief review, I focused on the abdominal expiratory motor pattern in the rat. In the vagotomized adult rat, hypercapnic acidosis evoked two patterns of the abdominal expiratory activity; one with low amplitude expiratory discharge (E-all activity) that persisted throughout the expiratory phase, and another with late expiratory and high amplitude bursts (E2 activity) superimposed on the E-all activity. The E-all activity appeared from milder acidosis than the E2 activity. In the anesthetized, vagotomized or vagus-intact neonatal rats, abdominal muscles often showed not only E2 activity but also a smaller additional burst occurred just after the termination of diaphragmatic inspiratory activity (E1 activity). Since this E1 activity is rarely observed in the adult rat, the abdominal respiratory motor pattern likely changes during postnatal development. Under light anesthesia, vagal afferent feedback shortened the respiratory cycle period due to shortening of the expiratory duration. Further decrement in depth of anesthesia changed the biphasic E2+E1 abdominal motor activity pattern to E-all activity pattern in the vagus-intact neonatal rat. Since this Eall activity was typically observed with short cycle period in the vagus-intact neonatal rat, relation with the E-all activity in the vagotomized adult rat remained unknown. The vagal feedback should have roles not only in setting the cycle period short but also shaping the expiratory motor pattern in the neonatal rat. Although abdominal muscles in the in vitro preparation from neonatal rat also showed biphasic E2+E1 activity, E2 activity was shorter and/or smaller than the E1 activity. © Springer Science+Business Media, LLC 2010.

Iizuka M.,Ibaraki Prefectural University of Health Sciences
Respiratory Physiology and Neurobiology | Year: 2011

The abdominal muscles form part of the expiratory pump in cooperation with the other expiratory muscles, primarily the internal intercostal and triangularis sterni muscles. The discharge of abdominal muscles is divided into four main patterns: augmenting, plateau, spindle and decrementing. The patterns tend to be species-specific and dependent on the state of the central nervous system. Recent studies suggest that the abdominal muscles are more active than classically thought, even under resting conditions. Expiratory bulbospinal neurons (EBSN) in the caudal ventral respiratory group are the final output pathway to abdominal motoneurons in the spinal cord. Electrophysiological and anatomical studies indicated the excitatory monosynaptic inputs from EBSN to the abdominal motoneurons, although inputs from the propriospinal neurons seemed to be necessary to produce useful motor outputs. Respiration-related sensory modulation of expiratory neurons by vagal afferents that monitor the rate of change of lung volume and the end-expiratory lung volume (EELV) play a crucial role in modulating the drive to the abdominal musculature. Studies using in vitro and in situ preparations of neonatal and juvenile rats show bi-phasic abdominal activity, characterized by bursting at the end of expiration, a silent period during the inspiratory period, and another burst that occurs abruptly after inspiratory termination. Since the abdominal muscles rarely show these post-inspiratory bursts in the adult rat, the organization of the expiratory output pathway must undergo significant development alterations. © 2011 Elsevier B.V.

Tsunaka M.,Ibaraki Prefectural University of Health Sciences | Chung J.C.C.,Hong Kong Polytechnic University
Ageing and Society | Year: 2012

Meaningful engagement in activity is associated with the maintenance of health and wellbeing, but reduced activity participation is common among persons with dementia. Family care-givers play an important role in engaging their relatives with dementia in activities but little is known about their perception of occupational engagement. This study aimed to examine care-givers' perception of occupational performance of their relatives from three aspects: person, occupation and environment. Adopting a qualitative methodology, semi-structured and in-depth interviews were conducted with 14 family care-givers. Care-givers were also asked to document the activity patterns of their relative, using the Activity Card Sort Hong Kong version (ACS-HK). The ACS-HK findings suggested that high-demand leisure activities were mostly retained (61%) while instrumental activities of daily living were the least retained (37%). Qualitative analysis revealed that care-givers' perception of activity participation was intertwined with their motives and behaviours to get their relatives engaged in activities. Care-givers acknowledged occupational engagement as a means of maintaining wellness and used various strategies to encourage their relative's activity participation. Apathy and passivity, however, are difficult to deal with. Also, activity decisions appear to depend on the availability of support resources and a balance between safety concern and risk-taking. Clinical practitioners could assist care-givers by suggesting activity strategies and providing support resources for continued engagement of their relative in activities. © 2011 Cambridge University Press.

Mutsuzaki H.,Ibaraki Prefectural University of Health Sciences | Ikeda K.,Ichihara Hospital
Journal of Orthopaedic Surgery and Research | Year: 2012

Background: Patients undergoing cementless total knee arthroplasty (TKA) sometimes suffer large blood loss. In a retrospective study, we explored whether postoperative intra-articular retrograde injection of tranexamic acid (TA) and leaving a drain clamp in place for 1 h reduced blood loss.Patients and methods: Patients (n = 140) treated with unilateral primary cementless TKA (posterior cruciate ligament retained) were divided into two groups: those who had an intra-articular injection of TA (1000 mg) and drain clamping for 1 h postoperatively (study group, n = 70) and those who were not given TA and did not undergo clamping of their drains (control group, n = 70). Postoperative total blood loss, volume of drainage, hemoglobin level, transfusion amounts and rates, D-dimer level at postoperative day (POD) 7, and complications were recorded.Results: Total blood loss, total drainage, mean transfusion volume, and transfusion rates were lower in the study group than in controls (P < 0.001). Hemoglobin levels on PODs 1 and 14 were similar in the groups, but on POD 7 the hemoglobin level was higher in the study group than in controls (P < 0.001). D-dimer level on POD 7 was lower in the study group than in controls (P < 0.05). There were no complications in either group.Conclusions: Immediately postoperative intra-articular retrograde injection of TA and 1 h of drain-clamping effectively reduced blood loss and blood transfusion after cementless TKA. We believe that this method is simple, easy, and suitable for these patients. © 2012 Mutsuzaki and Ikeda; licensee BioMed Central Ltd.

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