A rubber tip disconnection of Arrow-Trerotola percutaneous thrombolytic device (PTD) may occur occasionally. We experienced 5 cases of a rubber tip disconnection among 453 mechanical thrombectomy sessions with the use of PTD. We present a report about these five cases and suggest possible causes for the occurrences.
Aged ; Catheter Obstruction/*etiology ; Equipment Failure Analysis/*methods ; Female ; Humans ; Male ; Middle Aged ; Renal Dialysis/*instrumentation ; Rubber ; Thrombectomy/*instrumentation ; Treatment Outcome

Endovascular salvage of the hypogastric artery using iliac branch device (IBD) during endovascular aortic aneurysm repair (EVAR), offers less invasive alternative solution to surgery to prevent pelvic ischemia. We have performed the first Korean surgeon custom-made IBD for this purpose to overcome the limitation of unavailability of the devices in Korea. Four patients with abdominal aortic aneurysm with bilateral common iliac artery aneurysm (CIAA) were treated using custom-made IBDs from October 2013 to December 2013. IBD was created in back table before EVAR operation using TFLE Zenith iliac limb stent graft (Cook Inc.). Three V12 (Atrium, Inc.) one Viabahn (Gore, Inc.) were used for bridging between IBD and target hypogastric artery. With this modification of IBD procedure, exteriorize the guide wire without snare device is possible which offers another benefit in terms of reducing medical costs comparing to commercial IBD. All operations were successful without any device related complications or postoperative endoleaks. During the mean follow up of 3 months, all IBD were patent without clinical complications. Surgeon custom made IBD is feasible and useful to preserve pelvic perfusion especially in the situation of limited commercial IBD availability in many countries. Long-term follow-up is needed to evaluate stent graft patency and IBD-related complications.
Aged ; Aortic Aneurysm, Abdominal/*surgery ; *Blood Vessel Prosthesis ; Endovascular Procedures/*instrumentation ; Equipment Design ; Equipment Failure Analysis ; Female ; Humans ; Iliac Aneurysm/*surgery ; Iliac Artery/*surgery ; Male ; Salvage Therapy/*instrumentation/methods ; *Stents

Calcium hydroxide (CH) dressing residues can compromise endodontic sealing. This study aimed to evaluate the amount of remaining CH in root canals after mechanical removal by four groups of irrigation techniques including needle irrigation only, ProTaper file, EndoActivator, and ultrasonic file. Fifteen extracted single-rooted teeth were collected and used for all four groups. The samples were firstly prepared by ProTaper rotary instruments, and then sectioned longitudinally through the long axis of the root canals, followed by final reassembling by wires. CH was kept in the canals for 7 days setting. The removal procedure began with 5 mL of 2.5% sodium hypochlorite (NaOCl) followed by 1 mL of 17% ethylenediaminetetraacetic acid and a final irrigation with 5 mL of 2.5% NaOCl solution for all groups. No additional agitation of the irrigant was performed in group 1, while agitation for 20 s between irrigants was done with F2 ProTaper rotary file in group 2, EndoActivator with tip size 25/.04 in group 3 and by an ultrasonic file 25/.02 in group 4. The total activation time was 60 s. The roots were then disassembled and captured by digital camera. The ratio of CH coated surface area to the surface area of the whole canal as well as each third of the canal was calculated. The data were statistically analyzed by one-way ANOVA using post hoc Tukey test. Results showed that none of the four techniques could remove all CH. No significant difference was found between EndoActivator and ultrasonic techniques. However, they both removed significantly more CH than ProTaper and needle irrigation (P=0.0001). In conclusion, the sonic and ultrasonic agitation techniques were more effective in removing intracanal medicaments than the ProTaper rotary file and needle irrigation in all thirds of the canal.
Calcium Hydroxide ; isolation & purification ; Dental Instruments ; Dental Pulp Cavity ; chemistry ; Equipment Design ; Equipment Failure Analysis ; Humans ; In Vitro Techniques ; Root Canal Irrigants ; isolation & purification ; Root Canal Preparation ; instrumentation ; methods ; Sonication ; instrumentation ; methods ; Therapeutic Irrigation ; instrumentation

Artificial knee joint simulation test is an important form in the research and evaluation of prosthetic material and design. Natural knee joint could not be tested by conventional instruments because of complex motion and load in movement. Simulation test designed for artificial knee is needed. At present, two kinds of simulation, namely simplification method and complete simulation, are widely used. Complete simulation can be used for simultaneous evaluation of material and design of prosthesis, whereas simplification method is only useful in evaluating the material of prosthesis. In international standards, there are already two protocols for artificial knee joint experiment, namely load control and displacement control. This paper also reviews the evaluation criteria and measurement standards for artificial knee joint simulation test, and then envisages the researches in future.
Arthroplasty, Replacement, Knee ; instrumentation ; Computer Simulation ; Computer-Aided Design ; Equipment Failure Analysis ; methods ; Humans ; Knee Prosthesis ; Prosthesis Design ; methods

The AB 7300 Real-time PCR Systems in our hospital have been detected malfunction for three times in a short term. The detection indicated the major reason for the malfunction attributed to the fuse of the solder of the COVER at the same position with the serial number 4344490 D1. This article explicitly introduces how to detect and maintain this equipment. It serves as a good reference for colleagues. Meanwhile the author raises five issues for further exploration and discussion.
Equipment Failure Analysis ; Maintenance ; methods ; Polymerase Chain Reaction ; instrumentation ; methods

The authors hypothesized that the placement of the interspinous implant would show a similar clinical outcome to the posterior lumbar interbody fusion (PLIF) in patients having spinal stenosis with mild segmental instability and that this method would be superior to PLIF without significantly affecting degeneration at the adjacent segments. Forty two adult patients having degenerative spinal stenosis with mild segmental instabilit who underwent implantation of Coflex(TM) (Spine motion, Germany) or PLIF at L4-5 between January 2000 and December 2003 were consecutively selected and studied for one-year clinical outcome. At 12 months after surgery, both groups showed a significant improvement in the visual analogue scale score and Oswestry disability index score for both lower extremity pain and low back pain. However, the range of motion at the upper adjacent segments (L3-4) increased significantly after surgery in the PLIF group, which was not manifested in the Coflex(TM) group during the follow-up. The authors assumed that interspinous implantation can be an alternative treatment for the spinal stenosis with segmental instability in selected conditions posing less stress on the superior adjacent level than PLIF.
Treatment Outcome ; Spinal Stenosis/complications/*surgery ; Spinal Fusion/*instrumentation/methods ; Prosthesis Design ; Pain Measurement ; Outcome Assessment (Health Care) ; Middle Aged ; Male ; Lumbar Vertebrae/*surgery ; Longitudinal Studies ; Joint Instability/complications/*prevention & control ; Intermittent Claudication/diagnosis/etiology/*prevention & control ; Humans ; Female ; Equipment Failure Analysis ; Back Pain/diagnosis/etiology/*prevention & control ; Aged ; Adult

An introduction of an intelligent testing instrument for medical electrical equipment security is given in this article. The realization of its testing functions is based on a single-chip processor, the high-voltage control circuit and the relay combination network technology. It can be used to test security parameters such as the continuous leakage current, patient auxiliary current, dielectric strength and protective earth impedance. It is suitable for the medical electricity security testing of Kind I, II and Type B, BF, CF (internal power supply) medical electrical equipments.
Electricity ; Equipment Design ; Equipment Failure Analysis ; instrumentation ; methods ; Equipment Safety ; instrumentation ; methods ; Software Design

According to the structural characteristics of spiral CT systems and our experiences, some relevant solutions to common malfunctions in daily maintenance are suggested.
Computers ; Equipment Design ; Equipment Failure ; Equipment Failure Analysis ; methods ; Humans ; Maintenance ; Tomography, Spiral Computed ; instrumentation

This article introduces a new testing method for mammographic x-ray equipments. The films placed around the x-ray tube assembly are exposured to find the location of leakage radiation and then the accurate testing for the leakage radiation of the mammographic x-ray equipment is carried out with a radiation dosimeter.
Equipment Design ; Equipment Failure Analysis ; Female ; Humans ; Mammography ; instrumentation ; methods ; Quality Control ; Radiation Dosage ; Radiation Protection ; instrumentation ; methods ; Radiometry ; instrumentation ; methods

This paper presents a test system of prenatal screen for Dow's syndrome, based on the quantitative test technology of gold immunochromotographic assay (GICA). The prenatal screen for Down's syndrome and the risk rate of Down's syndrome are given by calculating with the screen software. The test system features easy operation, fastness and individual tests.
Adult ; Chromatography ; methods ; Colloids ; Computers ; Down Syndrome ; diagnosis ; Equipment Failure Analysis ; Estriol ; blood ; Female ; Gold ; Humans ; Pregnancy ; Prenatal Diagnosis ; instrumentation ; methods ; Sensitivity and Specificity ; Signal Processing, Computer-Assisted ; Software Design ; alpha-Fetoproteins ; analysis