JP2015020046A - Instrument for soft endoscope cleaning evaluation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a process-challenging device for evaluating the effect of a washing process in a lumen of a soft endoscope.SOLUTION: Into both endpoints of a soft resin tube 1, rigid resin tubes 2 having a larger external diameter than an inner diameter of the soft resin tube are inserted. The outside of the insertion parts are fixed by a heat-shrinkable tube 3 so that a figuration where a step 4, which is the most difficult to wash in a lumen of a soft endoscope, exists is reproduced.

Description

The present invention relates to an apparatus for evaluating the effectiveness of a cleaning process in the lumen of a flexible endoscope.

  As a method of evaluating the cleaning effect of surgical instruments, an indicator coated with artificial contaminants (test soil) for cleaning evaluation on a plate such as stainless steel is cleaned with the instrument, and the presence or absence of the test soil after cleaning is visually checked. Methods for evaluating by checking are widely known. Moreover, by putting an indicator in a transparent case, there is one that can visually evaluate the cleaning effect on a difficult-to-clean part such as a box lock part of a steel accessory (see Non-Patent Document 1). There is also an apparatus that inserts an indicator into a tube simulating a flexible endoscope and evaluates the cleaning effect on the lumen (channel) of the flexible endoscope (see Non-Patent Document 2). There is also a method for evaluating the cleaning effect by detecting residual blood or residual protein by wiping the channel of a soft endoscope that has been cleaned with a dedicated brush and analyzing the wipe using a reagent (non-contained) (See Patent Document 3).

"Cleaning indicator TOSI" catalog "Cleaning indicator TOSI-FlexiCheck" catalog "Residual protein detection kit in soft endoscope channel Pyromol-E / Residual blood detection kit in flexible endoscope channel HemoCheck-E" catalog

  The forceps channel of the flexible endoscope is also commonly used as an inhalation channel, and is branched into a channel connected to the inhalation pump and an oblique channel toward the forceps hole inside the endoscope body. In order to form a branch to the forceps hole, the tube to be inserted into the body and the tube on the suction pump side are separated, and a step corresponding to the tube thickness is generated between the tube and the main body. This step portion is the most difficult to clean inside the flexible endoscope, and the evaluation of cleaning is difficult.

  The method of putting a plate coated with a colored test soil in a transparent case and washing it together with the object to be washed is sufficient as a cleaning evaluation for general surgical instruments, but it is not like a flexible endoscope channel. The cleaning of complex structures cannot be evaluated.

  The method of inserting a plate coated with a test soil into a tube simulating a flexible endoscope cannot directly evaluate the cleaning effect on contaminants adhering to the lumen of the flexible endoscope. Further, it is recommended in the cleaning guidelines and the like that manual cleaning using a brush is performed before automatic cleaning, but this method has a problem that the effect of manual cleaning cannot be evaluated.

  In the method of using a reagent by wiping the channel of a soft endoscope that has been cleaned with a dedicated brush, the operation is complicated, it is not known where the detected residue has adhered, Depending on the operation, there is a problem that the residue cannot be wiped off and cannot be detected.

  Insert and fix two tubes made of transparent or translucent hard resin larger than the inner diameter at both ends of the tube made of transparent or translucent soft resin, and inhalation / forceps channel and flexible endoscope A hollow shape simulating the step of the handle lumen is created, and a test soil is applied to the inside.

  A soft resin tube in which a hard resin tube having a diameter larger than the inner diameter is inserted at both ends generates a step equal to the wall thickness. By making the height and interval of this step larger than that of a commercially available flexible endoscope, the shape becomes more difficult to clean.

  Apply the test soil to the inside of this device, cut it after washing with a hand and an automatic washing machine, and analyze the inside residue, so that the lumen of the flexible endoscope including the stepped part that is most difficult to clean It becomes possible to evaluate the cleaning effect of the channel, and it can be a process challenging device (PCD) for evaluating the cleaning process.

  In addition, the test soil to be applied is colored, and each member is made transparent or semi-transparent, so that it is possible to confirm the cleanability by visual observation.

1 is an overall configuration diagram showing an embodiment of the present invention. Sectional drawing which shows the soft resin tube vicinity of the said instrument.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Two hard resin tubes (made of polytetrafluoroethylene (PTFE) in this example) having a length of 500 mm, an inner diameter of 4 mm, and an outer diameter of 5 mm simulating a working channel and a suction port are simulated to a branching portion to a forceps insertion hole. The soft resin (made of silicone in this example) having a length of 30 mm, an inner diameter of 4 mm, and an outer diameter of 5 mm is inserted into both ends of the tube 1. The step 4 thus formed is 0.5 mm. The interval between the hard resin tubes 2 is set to 15 mm. In order to fix in this state, the heat-shrinkable tube 3 is covered from the overlapped portion of the tube to the hard resin tube 2 and is shrunk by heating. By applying a test soil to the inside of the instrument, a PCD for cleaning evaluation is obtained.

1. 1. Soft resin (silicone) tube 2. Hard resin (PTFE) tube 3. heat shrink tube Step

Claims (2)

An instrument for a cleaning evaluation apparatus, wherein a step shape inside a flexible endoscope is reproduced by inserting and fixing a hard resin tube having an outer diameter larger than the inner diameter at both ends of the soft resin tube. The soft resin tube, the hard resin tube, and the heat shrinkable tube that fixes them are made of a transparent or translucent material, and when a colored test soil is applied to the inside, the cleaning effect can be confirmed visually. The device of claim 1 capable.

Images