JPH0119967Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to an instrument that can be used by obstetricians and gynecologists to dilate the uterine cervix when performing mid-term artificial abortion surgery.

(b) Conventional technology To perform mid-term induced abortion (4 to 6 months of pregnancy), it is necessary to open the cervix to a diameter of 3 to 5 cm (allowing insertion of two to three fingers). Cervical dilation is generally performed in the following order.

Mechanically dilate from No. 1 to No. 20 (1.7 cm diameter) using Hegar's cervical dilator.

Three to four laminaria (seaweed roots that expand by absorbing water) are inserted into the dilated cervix. about
After 24 hours, remove it and if the expansion is insufficient, insert more new laminaria, and add 1 new laminaria.
Repeat ~2 times.

Next, Metroi Lintel 3 [Sterilized water is 100-200]
Once a rubber balloon capable of injecting cc (with a water injection tube 2) can be inserted into the uterine cavity, water is injected according to the volume, and the water injection tube 2 is pulled. A pulley is used for traction, and a gravity of 800 to 1000 g is applied. Alternatively, place the fixing plate on the vulva, pull the water injection tube firmly through the hole in the center, and secure the water injection tube with a clip to maintain traction.

If the metrolintel is naturally excreted, the fetus can be delivered naturally or easily delivered artificially.

(c) Problems that the invention aims to solve: Laminaria is difficult to sterilize and store;
There is also a high risk of infection, and cervical dilatation
It takes 3 days.

When using the metro lintel, traction is required, the pulley restricts the patient's freedom, the fixation plate impedes toileting to some extent, and physical stimulation of the vulva is unavoidable.

The water supply pipe is easily cut due to towing.

When using Metrolintel, natural evacuation does not immediately mean completion of cervical dilation. This is called the hourglass phenomenon, and the water in the thin rubber balloon inside the uterine cavity gradually moves from the uterus to the vaginal cavity due to contractions and traction, and eventually the metrolintel is expelled.

To measure cervical dilatation, only an approximate estimate can be made by manual examination during pelvic examination after removal of laminaria or metropintel.

With conventional techniques, mid-term induced abortion takes an extremely long time from start to finish, taking more than a week on average. The patient's frustration and the doctor's haste cannot be overlooked.

(d) Means for solving the problem In this invention, the material is thick rubber or other elastic material, and it is a long and thin pipe 1 with one end closed and a thin water injection pipe 2 at the other end. .

It is characterized by being folded in half at the center of the main body, inserted through the folded part, extending into the uterine cavity, uterine cervix, and vaginal cavity, forming a water injection pipe, and closing the water injection pipe to promote cervical dilatation.

(E) Effect The cervical dilation effect is the same as inserting two tubes, and exerts a strong dilating force. Expansion force can be adjusted freely by increasing or decreasing the amount of water injected.

(F) Example Rubber thickness 1mm, body length 28cm, outer diameter of tube
A device with a 2.3 cm tube closed at one end and a water injection tube attached to the other end was used. Depending on the case, 80 to 120 c.c. of water is initially injected, and if the cervix dilates to 2 cm to 2.5 cm within 20 hours in all cases, an additional half dose of 40 c.c. to 60 c.c. is injected.
The cervix dilated to 3 cm to 4.5 cm within 48 hours.

(g) Effects of the device The Hegar cervical dilator is used as before, but the laminaria is not used.

There is no invagination into the uterine cavity or sliding into the vaginal cavity.

The traction of the conventional metro lintel has disappeared,
There is no restriction of freedom, no obstruction to toileting, no stimulation of the genital area, etc.

Using an ultrasonic tomography device, it is possible to measure the dilatation of the cervix while wearing the device.

The hourglass phenomenon does not occur because the rubber tube wall is strong.

For safety, even if the amount of water injected initially is small, the dilation can be measured and the amount of water injected can be increased successively to complete the surgery in an extremely short time.

[Brief explanation of drawings]

The figures show one embodiment of the present invention; Fig. 1 is a front view, and Fig. 2 is a cross-sectional view of the cervical dilator in use; A is an example of the use of the present invention; 1 is the device of the present invention; B is using the conventional Metro Lintel 3 to install the water injection pipe 2.
Indicates the traction condition of.

Claims (1)

[Scope of utility model registration request] A hollow tube 1 of rubber or equivalent elastic material with a length of about 28 cm and an outer diameter of about 2 to 3 cm when under no pressure, with one end closed and a thin water injection tube 2 connected to the other end for cervical dilatation. utensils.