43 results about "Cervical dilators" patented technology

A cervical dilator including a stem comprising a partly or fully dehydrated hydrogel comprising a water-insoluble synthetic hydrophilic polymer capable of radial expansion due to absorption of water from a bodily fluid. The cervical dilator softens and ripens the cervical tissue and expands the cervical canal by a combined action of radial hydrogel stem expansion and osmotic withdrawal of water from the tissue. The osmotic withdrawal is caused by at least one osmotically active compound, such as a water-soluble salt, a polyelectrolyte, or a mixture thereof, wherein the at least one osmoticallyactive compound is dispersed in the hydrogel. The cervical dilator may also include a non-toxic plasticizer of the hydrogel, such as water.

The invention discloses an auxiliary cervical dilator, which comprises an inner guiding tube and an outer guiding tube. A cervical dilation balloon is arranged on the outer side of the outer guiding tube near its head end, and a vulva limiting balloon is arranged near the tail end. The outer guiding tube There are two water injection channels connected to the cervical dilation balloon and the vulva limit balloon in the tube wall of the outer guide tube, and the water injection port I and the water injection port II connected with the two water injection channels are provided on the tube wall of the outer guide tube. A uterine-limiting balloon is provided on the outside of the inner guide tube close to its head end, and a water injection port III connected with the uterine-limiting balloon is provided at the tail end of the inner guide tube through the water injection channel set in the tube wall. The tail end protrudes from the outer guide tube and is connected to the drawing plate; the guide tube is provided with a positioning pin for fixing the position of the inner guide tube. The invention can accurately restrict the cervical dilatation balloon to the cervix, effectively promote the dilation of the cervix, and can properly dilate the internal os of the cervix without damaging the cervix, and is safe and convenient to use.

The invention provides a combined type cervical dilator which structurally comprises a hand-held tube, a dilation balloon and a guide bulb, wherein the hand-held tube, the dilation balloon and the guide bulb are mutually spliced into a shape like a string of candied haws; the upper end of the hand-held tube, the upper end of the dilation balloon and the upper end of the guide bulb are respectively provided with a constricted tube; the constricted tube at the upper end of the guide bulb is spliced with the lower end of the dilation balloon, and the constricted tube at the upper end of the dilation balloon is spliced with the lower end of the hand-held tube; the dilation balloon is composed of a rigid tube, an annular capsule and an inflation tube; the upper end of the rigid tube is provided with the constricted tube; the annular capsule is attached to the outer circle of the rigid tube; the middle of the rigid tube is provided with an air admission nozzle; one end of the air admission nozzle is connected with the inflation tube, and the other end is communicated with the cavity of the annular capsule; the inflation tube is extended outwards through the hand-held tube; and the outerwall of the hand-held tube is provided with graduation marks.

The invention provides a disposable cervical dilator attached with a medicine film, and a preparation method of the disposable cervical dilator with the medicine film. The cervical dilator is attached with the medicine film of local anesthetics; when the disposable cervical dilator is used, the medicine film is swollen and dissolved under body temperature; and medicines in the medicine film are released out, and are absorbed by a cervical mucous membrane, so that pain of patients is relieved, and occurrences of adverse reactions are reduced. The disposable cervical dilator with the medicine film is convenient to use, and simple and feasible in preparation process; the related pharmaceutic adjuvants are all easy to purchase and are low in cost; and the disposable cervical dilator has good social and economic benefits.

The invention belongs to dilators and particularly relates to a cervical dilator. The cervical dilator comprises a dilating head, a dilating frame, an inner core, a connecting rod and bilateral side handles which are sequentially connected mutually; the rear end of the dilating head is connected with the dilating frame; the dilating head and the dilating frame are in circular hollow structures; the dilating frame comprises an upper portion fan-shaped side, a lower portion fan-shaped side and symmetrical dilating sheets on bilateral sides. According to the cervical dilator, the dilating effect is good, the utilization method which is similar to that of original pliers and scissors is convenient, a cervix uteri is externally opened through the dilating sheets, collecting and releasing functions of opening are achieved according to the principle of a fan-shaped shed-shaped support and in combination with matching of the inner core and the dilating frame through flexible hinged supporting points installed at support joints, cervical damage caused by normal dilation is avoided.