Threaded anal dilatation device

Abstract

The invention provides a threaded anal dilatation device. The threaded anal dilatation device comprises a sleeve, wherein first threads are arranged on the outer wall of the sleeve; a plurality of grooves are formed in the inner wall of the sleeve in the peripheral direction; a tube core can be inserted in the sleeve; one end, which penetrates out of the sleeve, of the tube core becomes a nose cone; second threads are arranged on the outer wall of the nose cone; and a plurality of projections are arranged on the outer wall of the tube core in the peripheral direction and can be respectively inlaid in the grooves in a matched manner. The first threads are arranged on the outer wall of the sleeve of the threaded anal dilatation device, the second threads are arranged on the outer wall of the nose cone, a mode of directly inserting an anal dilation device into an anus in the prior art is changed into a mode of rotatably inserting the anal dilation into the anus; owing to the threads which have hooking effect, the sleeve cannot slip out of the anus of a patient easily, steps of stitching and taking out stitches are omitted, surgical procedures are simplified, and pain of the patient is relieved. In addition, a doctor only needs to hold the tube core of the threaded anal dilation device to rotate with a single hand, then reliable projection and groove gripping structure drives the sleeve to rotate synchronously, and the threaded anal dilatation device is simple to operate.

Description

technical field [0001] The invention belongs to a medical device, in particular to a threaded anal dilator. Background technique [0002] Anal dilator is a single-use medical device used for low rectal examination and auxiliary surgery. In clinical practice, it is inserted from the patient's anus to stretch the anal sphincter and rectum, which can provide a wider surgical field of view, and cooperate with staplers, light sources, ultrasonic scalpels, needle holders and other surgical instruments to perform operations such as tumor resection and intestinal anastomosis. [0003] Traditional anal dilators usually include a cannula supporting the intestine and a cone-headed stylet for guiding. After inserting the cannula, apply lubricant on the surface, and then insert it into the patient's anus, and place it in place (exposing and not covering the lesion) Then pull out the core. There are following defects in this anal expander use: [0004] a. The cannula is in contact with...

AI Technical Summary

Problems solved by technology

[0006] c. During inspection or surgical operation, a separate light source is required for lighting, but the light source has no interface on the anal dilator, so it needs to be held or specially fixed, which is inconvenient to operate;

[0007] d. After the anus is dilated, the scope of observation and operation is limited. The doctor has to perform visual observation in a narrow window with a diameter of 35mm-45mm while completing the operation. The field of view is blocked, and it is inconvenient to observe the intestinal conditions perpendicular to the line of sight.

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