ABSTRACT
Objective@#The cadaveric specimens stained with iodine-potassium iodide can show the fine structure of muscles by Micro-CT scanning. A specimen with cleft palate was scanned using this technique to explore the relationship between the muscle fibers of pharyngeal muscles in order to guide the muscle reconstruction in cleft palate repair, so as to understand the lingual pathology secondary to cleft palate.@*Methods@#One unclaimed 28-week aborted stillbirth, diagnosed as Ⅱ-degree cleft palate, was dissected.The anatomic structure between orbital floor plane and mouth bottom plane was saved, and soaked in 4% for maldehyde for 8 hours. Thereafter, the subject was soaked in 3.75% iodine-potassium iodide for 7 days for staining. The stained specimens were scanned with Micro-CT. The muscle fibers were drawn in the exported DICOM images, for three-dimensional muscle reconstruction.@*Results@#The main muscles of velopharynx were located in the tomographic image and the three-dimensional reconstructed model, including: the levator muscle of palatine velum, the tensor velipalatini, the palatopharyngeus muscle, the palatoglossus muscle, and the upper part of the superior pharyngeal constrictor. Some local anatomical features of the muscles were also found: (1)The tensor velipalatini has a branch ended at the lateral pharyngeal wall.(2)The superior pharyngeal constrictor has multiple connections with the levator muscle of palatine velum, the tensor velipalatini, the palatopharyngeus muscle.(3)There was no obvious muscle fiber crossing between the internal muscles of the cleft palate. The muscle of uvula was not found either.@*Conclusions@#With the application of high-resolution Micro-CT technology, new branches of pharyngeal muscles and crossings of muscles can be recognized. In the cleft palate specimen, the main functional muscles of pharyngeal are mainly associated with superior pharyngeal constrictor. The muscles in the palate and the pharynx are interrelated and form a three-dimensional " velopharyngeal muscle complex" .
ABSTRACT
Since the Beijing health and family planning commission promulgated the new medical technology management system,we have accepted and reviewed 14 key medical technologies in Beijing,such as resection of the skull base tumor (intracranial tumor outside communication),resection of intracranial important functional areas and large vascular malformation,renal vascular reconstruction technique,the technique of artificial joint replacement,coronary interventional diagnosis and treatment technology,etc.Through the existing laws and regulations requirements from medical new technology,the ethical review way,submit materials requirements and ethical review focus is analyzed,and combining with the experiences of our hospital in the medical technical review,aims to explore suitable for medical technology ethical review specification.
ABSTRACT
Through analyzing the problems of time,selection mode,research plan,and tracking review in the ethical review of scientific research projects,this paper put forward the corresponding countermeasures:standardized application procedures,diverse selection mode,standardized research plan,and strict tracking review.It aimed to improve the quality of ethical review of scientific research projects and improve the ethical review system.
ABSTRACT
Objective To observe the effects of Fuzheng Huayu Capsule on the expressions of the main roles, Rock1 and Rock2, in RhoA/Rock signal transduction pathway in rats with myocardial infarction (MI);To explore the possible mechanism of Fuzheng Huayu Capsule to improve ventricular remodeling in myocardial fibrosis. Methods The MI model was induced by ligation of the left coronary artery. Rats with MI were randomly divided into the model group, Fuzheng Huayu group and Fasudil hydrochloride group. A sham-operation group threading without ligation was setting as a control group, with eight rats in each group. The rats were treated with corresponding medicine for 4 weeks from the second day after modeling. The expression of Rock1, Rock2 and its mRNA were detected by immunohistochemical and real-time PCR method. Results The protein expression of Rock1 and Rock2 in model group were significantly higher than those in the sham-operation group (P<0.05). The protein expression of Rock1 and Rock2 in the Fuzheng Huayu group and Fasudil hydrochloride group were lower than those in the model group. The mRNA expression of Rock2 was significantly higher in the model group than that in the sham-operation group (P<0.05). The mRNA expression of Rock1 in the Fasudil hydrochloride group was lower than that in the model group (P<0.05). The mRNA expression of Rock2 in the Fuzheng Huayu group and Fasudil hydrochloride group was lower than that in the model group (P<0.05). Conclusion Fuzheng Huayu Capsule can decrease the expression of Rock1, Rock2 and Rock2 in the marginal zone of myocardial infarction in rats with MI. The anti ventricular remodeling mechanism of Fuzheng Huayu Capsule maybe related with this.