BACKGROUND/AIMS: We aimed to investigate the efficacy of peracetic acid (EndoPA®; Firson Co., Ltd., Cheonan, Korea) in disinfecting endoscopes. METHODS: We prospectively investigated the gastroscopes (Part I) utilized in 100 gastroscopic examinations and colonoscopes (Part II) utilized in 30 colonoscopic examinations after disinfecting them with 0.2% peracetic acid (EndoPA®; Firson Co., Ltd.). These instruments had been collected consecutively throughout the study period. We reprocessed and disinfected the endoscopes according to the guidelines for cleaning and disinfecting gastrointestinal endoscopes laid down by the Korean Society of Gastrointestinal Endoscopy in 2017. Three culture samples were obtained from each examination, based on different sampling methods. The primary outcome was a positive culture rate. RESULTS: In Part I of our study, two of 300 samples were positive. The culture positive rate after disinfection was 0.7% (2/300). The culture positive rate was not significantly different based on the exposure time to EndoPA® or the age of the scopes (p=0.7 or 0.2, respectively). In Part II of our study, all samples (n=90) were negative. CONCLUSIONS: We conclude that 0.2% peracetic acid (EndoPA®) appears to be a good disinfectant for both gastroscopes and colonoscopes.
Chungcheongnam-do ; Colonoscopes ; Disinfection* ; Endoscopes* ; Endoscopes, Gastrointestinal ; Endoscopy, Gastrointestinal ; Gastroscopes ; Peracetic Acid* ; Prospective Studies

The capsule endoscope swallowed from the mouth into the digestive system can capture the images of important gastrointestinal tract regions. It can compensate for the blind spot of traditional endoscopic techniques. It enables inspection of the digestive system without discomfort or need for sedation. However, currently available clinical capsule endoscope has some limitations such as the diagnostic information being not able to correspond to the orientation in the body, since the doctor is unable to control the capsule motion and orientation. To solve the problem, it is significant to track the position and orientation of the capsule in the human body. This study presents an AC excitation wireless tracking method in the capsule endoscope, and the sensor embedded in the capsule can measure the magnetic field generated by excitation coil. And then the position and orientation of the capsule can be obtained by solving a magnetic field inverse problem. Since the magnetic field decays with distance dramatically, the dynamic range of the received signal spans three orders of magnitude, we designed an adjustable alternating magnetic field generating device. The device can adjust the strength of the alternating magnetic field automatically through the feedback signal from the sensor. The prototype experiment showed that the adjustable magnetic field generating device was feasible. It could realize the automatic adjustment of the magnetic field strength successfully, and improve the tracking accuracy.
Capsule Endoscopes ; Endoscopy ; Gastrointestinal Tract ; Humans ; Magnetic Fields

On the basis of introduction and analysis of three new medical imaging equipments, the article discusses the superiority of the function integrity that is a new concept, and its application in the development of medical equipments in 21st century.
Diagnostic Equipment ; Diagnostic Imaging ; instrumentation

The paper introduces the scope of application of standard and basic contents of YY0648-2008. It shows part of the standard terms of understanding, especially in the original use of the GB 4793.1-2007 standard provisions based on new knowledge and understanding.
Diagnostic Equipment ; standards

A meta-analysis of studies was conducted on the validity of the Structured Clinical Interview for DSM (SCID) as diagnostic tools for the detection of psychiatric disorders: Schizophrenia, Bipolar disorder, major depressive disorder and Substance-related disorders. Looking at sensitivity and specificity, the SCID is seen to perform well, with to high values for all four diagnosis included in the study. In general, SCID was better used in detecting thrue negatives or the non-cases, as shown in higher specificities as compared to sensitivities.
MENTAL HEALTH ; DIAGNOSTIC EQUIPMENT

BACKGROUND/AIMS: Capsule endoscope (CE) is a new method of investigating entire small bowel (SB). Some reported that current battery time was sufficient for observing entire SB, but others reported negatively. The aims of this study were to determine the factors influencing the entire SB transit rate. METHODS: From Sep. 2002 to Aug. 2003, CE was performed in 197 cases and they were devided into complete/incomplete transit according to getting ileocecal valve image within battery time. sixteen cases were excluded due to anatomical abnormality or artificial procedure. one hundred eighty one cases were analyzed with multiple logistic regression. RESULTS: The complete SB transit rate was 63.5%. Mean battery time was 7 and 1/2 hrs. Gastric transit time (GTT) was significantly shorter in complete group than in incomplete group but the other factors (age, sex, preparation, symptom) were not significant. Mean small bowel transit time in complete group was 4 and 1/2 hrs and ranged from 1 to 8 hrs. In incomplete group (66 cases), 2 cases were reached to distal jejunum, 11 cases to proximal ileum, and the other 53 cases to distal ileum. CONCLUSIONS: Complete SB transit rate of CE was 63.5% in the 181 cases under current battery time. GTT was the only significant factor influencing gastrointestinal transit rate of CE.
Capsule Endoscopes ; Capsule Endoscopy* ; Gastrointestinal Transit* ; Ileocecal Valve ; Ileum ; Jejunum ; Logistic Models

The work of research and development of noninvasive monitoring system for human GI (gastrointestinal tract) has been very successful all over the world, and without questions, the system as such will extensively be applied in the future. However, the method for localization of the monitoring capsule in the system is not perfect. This paper reports the status quo of the research process for the capsule localization system, and analyzes their advantages and defects.
Biosensing Techniques ; Capsule Endoscopes ; Capsule Endoscopy ; methods ; trends ; Equipment Design ; Gastrointestinal Tract ; Humans

The requirement & testing method of the time accuracy in M-mode according to standard GB10152-2009 were analyzed, a time accuracy tester was researched and designed.
Diagnostic Equipment ; Equipment Design ; Ultrasonography ; instrumentation

Nowadays, abdominal ultrasound (US) was used widely in the annually health checkup. It can detect some diseases in the presymptom period as effectively as looking for cancer early, e.g. the breast cancer US screening on over 30 year- old Asian women was very reliable. From January 1998 to November 1998, we performed the abdomen and breast US examination for 21,558 workers in 97 factories in the annually health checkup programs (included 17,547 cases of abdominal US and 4,111 cases of breast US). It concluded that the abdomen and breast ultrasonic screening examinations would be useful in the patients without symptoms
ultrasonography ; Diagnostic Equipment ; diagnosis ; Periodicals

The portable gastrointestinal wireless endoscope image receiver is developed and based on TMS320C6211 DSP. It can receive and demodulate the modulated signal which is transmitted from the camera-capsule, and then output the video signal. The synchronizing signals offered by SAA7114H are made best of and are used to design the time logic circuit. The fitful video signal can be collected under the control of the time logic circuit. The circuit can automatically get rid of useless blank data and only collect effective and good-quality video signals, and storage them in CF card. In addition, the image signal can be processed and compressed by DSP, and thus the data storage space and the data- analyzing time can be saved.
Capsule Endoscopes ; Capsule Endoscopy ; methods ; Computer Systems ; Endoscopes, Gastrointestinal ; Equipment Design ; Humans ; Image Interpretation, Computer-Assisted ; instrumentation ; methods ; Signal Processing, Computer-Assisted ; instrumentation ; Software