Cervical dilator with unilateral distraction function

Abstract

The invention discloses a cervical dilator with a unilateral distraction function. The cervical dilator comprises a tube body, wherein an inner core is arranged in the tube body; a dilating rack is arranged at the top of the tube body; a dilating head is arranged at the top of the dilating rack; the bottom end of the tube body is mounted on a support; a handle is hinged to each of two sides of thebottom of the support; a press bar is arranged on each handle, the press bars located on the two sides are symmetrically inclined and hinged to the lower end of the inner core together; the upper endof the inner core is connected with the dilating rack; the dilating rack is a parallel double-rocker mechanism and comprises a driving rocker, a rack rod, a driven rocker and a side stay connecting rod, the driving rocker is of a lever structure, a power arm is a side hook structure formed by the bottom end, bulging to the lower right, of a resisting arm, a force bearing point, a fulcrum and a force application point are not located in the same straight line, and the force application point and the upper end of the inner core are connected through a live hinge. The cervical dilator is good indilating effect, outward unilateral distraction of the cervix uteri is realized by the side stay connecting rod, and cervix uteri injury caused by common dilating is avoided.

Description

technical field [0001] The invention relates to a dilator, in particular to a single sided cervical dilator. Background technique [0002] At present, in many uterine operations, the cervix needs to be dilated, and the cervix is ​​often small, and medical instruments cannot be inserted into the cervix. Existing cervical dilators are various rod-type devices of different thicknesses, which require repeated operations to allow the contractile cervix to expand naturally under external pressure, which is very inconvenient; another rod-type dilator contacts and rubs against the inner wall of the cervix many times. , It is easy to cause cervical damage, and the expansion effect is very poor. A cervical dilator is disclosed in the patent No. CN201410533294.4, which includes an expansion head, an expansion frame, an inner core, a connecting rod and handles on both sides connected to each other in sequence, and the rear end of the expansion head is connected with the The expansion ...

AI Technical Summary

Problems solved by technology

[0002] At present, in many uterine operations, the cervix needs to be dilated, and the cervix is ​​often small, and medical instruments cannot be inserted into the cervix.

Existing cervical dilators are various rod-type devices of different thicknesses, which require repeated operations to allow the contractile cervix to expand naturally under external pressure, which is very inconvenient; another rod-type dilator contacts and rubs against the inner wall of the cervix many times. , it is easy to cause cervical damage, and the expansion effect is very poor

A cervical dilator is disclosed in the patent No. CN201410533294.4, which includes an expansion head, an expansion frame, an inner core, a connecting rod and handles on both sides connected to each other in sequence, and the rear end of the expansion head is connected with the The expansion frame, the expansion head and the expansion frame are all circular hollow structures. The expansion frame includes an upper fan-shaped surface, a lower fan-shaped surface and two symmetrical expansion pieces. The expansion effect of the expander is better, but the structure is complicated and the manufacturing cost is high. Moreover, the dilator expands the cervix through the expansion pieces on both sides, and the structural rigidity is weak and easy to be damaged.

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