Device for transfer of medications onto blood vessel wall
SUBSTANCE: invention relates to the field of medicine, in particular to vascular surgery, and is intended for transfer of medications onto an internal surface of a vessel wall. A device for transfer of medications onto the internal surface of the vessel wall contains a matrix, made in the form of a polymer film, covered with medication and placed on a flexible framework. The matrix and the framework have specified standard sizes. They are made with a possibility of placement in them of a cellular knitted metal temporary stent and with a possibility to be inside the temporary stent of an inflatable balloon with a fixed diameter and length and a cylindrical or conic shape when blowing under high pressure or a latex balloon with a possibility of filling the entire internal space of the temporary stent when blowing under low pressure.
EFFECT: invention makes it possible to simultaneously perform long-term efficient transfer of medication into the vessel wall with preservation of blood flow and efficient diameter of the affected vessel.
4 cl, 1 dwg
The invention relates to medicine, in particular to vascular surgery.
Known temporary wire mesh stent is used for maintaining effective lumen of a blood vessel or certain required amount of time. A temporary stent is not covered by the drug. Therefore, it is the transfer of drugs to the inner surface of the vascular wall to heal her injuries after intravascular intervention is not possible (Patent No. 2186547, EN).
For transfer of drugs to the inner surface of the vascular wall to heal her injuries after intravascular interventions use a known balloon catheters coated on their surface medicinal substances (Patent WO No. 2010/079218). However, this technical solution has the following disadvantages:
1. Time inflating the balloon, i.e., the direct contact of the outer surface of the cylinder covered with medicine, with the inner surface of the vascular wall, is limited to a maximum of 10 minutes
2. Because of the rigidity of the balloon portion of the catheter is formed by inflating high pressure of 5 ATM, and because of the presence of irregularities of the inner surface of the blood vessel is heterogeneous (loose contact with the surface of the container.
3. After deflation of the balloon blood vessel promptly the Xia to the reduction in diameter and makes ineffective the size for the implementation of the flow.
The aim of the invention is the elimination of the above disadvantages by the possibility of increasing drug exposure time (up to hours, days, weeks) by creating a device with a polymeric matrix, providing a snug fit to the damaged walls of the blood vessel, and create the necessary effective blood flow using a temporary stent.
This is achieved in that the device comprises a matrix made in the form of a polymeric film coated with a medicinal substance and placed on a flexible frame, the matrix and the frame have certain sizes and made with the possibility of location inside of them temporary knitted mesh metal stent and being inside the temporary stent of the inflatable balloon with a fixed diameter and length and a cylindrical or conical form when inflating high pressure or latex balloon with an opportunity to fill the entire inner space of the temporary stent during inflation with low pressure. The use of latex balloon prevents sagging of medicine in the cells of the stent and thus achieves a more dense and efficient contact of the film with medication with a rough inner surface of the vascular wall.
In addition, the matrix frame when ODA is defined medical indications can be used without a temporary stent, only located inside the inflatable balloon with a fixed size (diameter and length) and shape (cylindrical or conical) when inflating, including high blood pressure, or latex balloon with an opportunity to fill the entire inner space of the matrix cage when inflating with low pressure.
In addition, the framework and the matrix can be made of absorbable material, thereby reducing the load on the damaged wall of a blood vessel after a certain time required for therapeutic effects of the medicinal substance.
In addition, the frame may be made of a polymeric material or a metal wire, forming the shape of the body of rotation, and having a device for insertion and removal from a blood vessel.
In addition, the matrix can be coated with pharmaceutical substances on both sides. For example, the outer side (the surface in contact with the inner surface of the injured vascular wall) cytostatic agents or immunomodulators, and the inner side (in contact with the bloodstream) - anticoagulants or antiplatelet drugs.
The drawing shows the proposed universal matrix.
The device consists of a matrix 1 in the form of a polymer film with a medicinal substance, placed n the flexible frame 2, which can be made of absorbable material. In addition, the frame 2 may be made of a polymeric material and a metal wire and has a device 3 for insertion and removal from the blood vessel. The matrix can be coated on both sides (outer 4 and inner 5) medicinal substances. Inside the matrix 1 and the frame 2 is placed a temporary wire mesh stent 6. If necessary, the inside of the stent 6 may be placed inflatable cylinders with different characteristics (in the drawing not shown).
Work with the claimed device is as follows. In the narrowed blood vessel impose a standard inflatable balloon without printed on its outer surface medicinal substance (in the drawing not shown). The diameter of the cylinder is chosen closer to the maximum reference size of the vessel to achieve when the extension of the maximum possible (efficient) of the vessel lumen. For expansion of the narrowed segment of the vessel, the balloon inflate and blow it away. Then in the advanced segment of the vessel with the help of the device 3 device for insertion and removal) take the matrix 1 with frame 2 of the appropriate size. Then inside the matrix 1 with frame 2 enter a temporary stent 6 diameter corresponding reference vessel diameters, while pulling from delivering the Catete the RA (in the drawing not shown) takes its true diameter and tightly presses the outer surface 4 of the matrix 1 to the inner surface of the vascular wall, providing a snug fit and the transition of medicine from the surface 4 on the inner surface of the vascular wall within a much larger time (hours, days, weeks)than when inflating balloon catheter (not more than 10 minutes). However, if you are using a balloon catheter for delivery of a drug (less than 10 min) blood flow is completely blocked (not physiological), when using the design matrix 1 with a frame 2 and a temporary stent 6 the flow is fully preserved, and it allows you to carry out this operation - long-term drug effects on the inner surface of the damaged wall of a blood vessel with preserved blood flow (provides temporary stent) within a much larger time (hours, days, weeks) depending on medical indications.
If necessary, inside the temporary stent 6 can be placed:
1. An inflatable bladder (in the drawing not shown) with a fixed size (diameter and length) and shape (cylindrical or conical) for inflating, including high pressure for a more complete temporary straightening metal stent 6 when caliciviruses changes of the vascular wall.
2. Or latex balloon (in the drawing not shown) to fill the entire inner space of the temporary stent during inflation with low giving is the group to prevent sagging of the film with medication in the cells of the stent and, thus, achieving this more dense and effective contact of the film with medication with the inner surface of the vascular wall
In addition, the frame 2 and the matrix 1 can be made of absorbable material, thereby reducing the load on the damaged wall of a blood vessel after a certain time required for therapeutic effects of the medicinal substance.
In addition, the matrix 1, the frame 2 can be covered with pharmaceutical substances (4 outer, inner 5) on both sides.
For example, with 4 outer side (the surface in contact with the inner surface of the injured vascular wall) cytostatic agents or immunomodulators to reduce proliferative inflammatory reaction on the part of the injured inner surface of the vascular wall 5 and the inner side (in contact with the bloodstream) - anticoagulants or antiplatelet drugs for prevention of thrombotic complications during surgery.
In some medical cases, possibly inside the matrix 1 with frame 2 without using a temporary stent 6 location:
1. Inflatable balloon (in the drawing not shown) with a fixed size (diameter and length) and shape (cylindrical or conical) when inflating, including high pressure d is I a snug fit matrix with medication to the inner surface of the injured vascular wall.
2. Or latex balloon (in the drawing not shown) to fill the inflated balloon of the entire internal space of the matrix 1 with frame 2 when inflating with low pressure. Latex balloon completely takes the shape space, where he finds himself. And in the case of its use in the above situations, when there is an uneven inner surface of the vessel wall, allows a tighter fit of the matrix 1 with medication to the uneven inner surface of the vessel wall and more efficient transfer of drugs.
Inflatable balloon high pressure when inflating retains its: diameter, length, and shape (cylindrical or conical), and latex balloon takes the shape of inner space, where it is inflated.
Surgery ends with the destruction of balloon catheters, temporary stent 6, matrix 1 with a frame 2 with the help of the device 3.
Thus, the combination of the described features allows you to simultaneously carry out long-term, effective transfer of the drug into the vessel wall with preserved blood flow and the effective diameter of the affected vessel.
1. Device for transmission of medicinal substances on the inner surface of the wall of the blood vessel, characterized in that it contains a matrix that is made in the form of a polymeric film coated with Carstensen substance and placed on a flexible frame, the matrix and the frame have a certain standard sizes and made with the possibility of location inside of them knitted mesh metal temporary stent and with the possibility of being inside the temporary stent of the inflatable balloon with a fixed diameter and length and a cylindrical or conical form when inflating high pressure or latex balloon with an opportunity to fill the entire inner space of the temporary stent during inflation with low pressure.
2. The device according to claim 1 characterized in that the frame is made from absorbable or polymer material, or a metal wire, forming the shape of the body of rotation, and has a device for insertion and removal from a blood vessel.
3. The device according to any one of claims 1, 2, characterized in that the matrix is made of absorbable material.
4. The device according to any one of claims 1, 2, characterized in that the matrix is covered with a medicinal substance on both sides.
SUBSTANCE: there are performed beam therapy, intracavitary therapy and chemotherapy. For 5-7 days before the beginning of the radiation, Colagel-Beta with 1 β-interleukin 20 ml is introduced into a vaginal tube daily. Each session of the intracavitary therapy is preceded by introducing Colegel with 5-fluoruracil 20-25 ml into an uterine cavity and exposed for 30-40 minutes. Besides, from the beginning of the beam therapy 40-50 minutes after the radiation session, sodium alginate gel 20 ml containing methyluracil, dimethyl sulphoxide and hydrocortisone are introduced into a rectum and a bladder in a therapeutically effective amount. 5-10 procedures are performed.
EFFECT: providing faster regression of the tumour, reducing the rate and severity of radiation injuries of the rectus and bladder adjacent with the uterus with no risk of severe systemic toxic manifestations, including in senior patients with comorbid inoperable diseases and extended tumours.
SUBSTANCE: invention refers to medicine, namely to traumatology and biotechnology, and may be used for the biocompatible polymeric structure formation in bone tissues. That is provided by a puncture approach to a filled cavity in the bone tissues. That is followed by filling the cavity with a polymeric gel compound containing 55-97.7 wt % of the biocompatible polymer polylactide of a particle size of 50 to 100 mcm, 0.3-45 wt % of magnetic nanoparticles of ferric oxide of a particle size of 10 to 100 nm, the gelling agent maltodexrin in the amount of 0.5 to 50 wt % of the weight of mixed polymer and magnetic nanoparticles, as well as distilled water in the amount of 0.5 to 100 wt % of the weight of a dry mixture of the polymer, magnetic nanoparticles and gelling agent. A solid three-dimension structure is formed. That is accompanied with heating the compound throughout by exposing to an alternating magnetic field at frequency 500 kHz and amplitude 500 E for 3-5 minutes. Where appropriate slow down the process of heating the compound, it is additionally exposed to a direct magnetic field at amplitude 1000 E applied either to the whole formed volume, or locally depending on the problem to be solved.
EFFECT: method enables forming the biocompatible three-dimension structure in the specified cavity of the bone tissue with minimum surgical intervention.
SUBSTANCE: invention refers to medicine, namely to neurosurgery, resuscitation and neurology, and may be used for treating the permanent unconscious vegetative state. That is ensured by intratympanic streptomycin treatment with underlying common drug therapy of the state. The completion of the above is followed by the electric transcranial exposure on the brain. For the intratympanic treatment, streptomycin 1 g is dissolved in physiologic saline 1 ml. The preparation is introduced once a day from one side, and on the other day from the opposite side. The therapeutic course is 5-10 days. The electric transcranial exposure is presented by transcranial DC micropolarisation of intensity 200-400 mcA for 30-40 minutes daily for 16-24 days. The exposure is performed through 3-4 electrodes places on the areas of temporo-caudal projections and posterior associated cortical areas from both sides. For the first 6 days, such exposure covers the temporo-caudal projections, while on the other days the posterior associated cortical area projections are exposed. If required, the above therapeutic courses are repeated not earlier than in 3 months until the clear consciousness is reached.
EFFECT: method provides an immediate and convincing clinical effect without brain invasiveness, an ability to recover the clear consciousness in these patients, as well as a significant reduction of the pathologically increased muscle tone and as a result, achieved satisfactory level of the patient's self-service.
SUBSTANCE: invention refers to medicine, gynaecology and concerns treating non-specific cervicitis in nulliparae. What is involved is an etiotropic therapy according to the microscopic and bacterioscopic findings in a combination with a 10-day course of laser photophoresis started in the first phase of menstrual cycle for two menstrual cycles. For this purpose, the involvement area is coated with the balneological product 'Elton-gel' with the uterine cervix to be thereafter exposed to laser light at wavelength 0.9 nm, pulse power 5 Wt, pulse repetition frequency 600 Hz. The length of exposure for each locus makes: 2 minutes in first cervicitis, 3 minutes in the process of more than 1 year or the disease suffered for more than one year and the presence of more than two episodes of recurrence.
EFFECT: method provides reducing the length of treating subsacute and chronic non-specific cervicitis (SANC and CNC) in the given category of patients from 6-9 to 2-3 months, reducing the rate of the disease, providing noninvasiveness, safety and availability of the treatment.
3 ex, 2 tbl
SUBSTANCE: invention refers to medical equipment, namely to disposable applicators for excipient release. A disposable applicator for excipient release with an excipient receiving container. The receiving container is provided with an outlet hole, and has an arched convex wall and an opposite wall. The opposite wall is provided with an enclosing belt projecting into the container of the convex walls along its periphery. The convex wall is shaped so that to be tightly pressed to the belt and lying between the same and the opposite wall.
EFFECT: invention provides introducing almost the whole content of the container to the required amount that can be neglected.
12 cl, 8 dwg
SUBSTANCE: invention refers to medicine, namely physiotherapy, otorhinolaryngology. The method involves the endonasal drug administration by electrophoresis. For electrophoresis, two paired U-cathodes are placed around the right and left ears. The drug preparations are administered by a wet nonwoven material. The endonasal electrodes (anodes) are wrapped with the nonwoven material of surface density 40-60 g/m2. The material of the one electrode is coated with a composition of sodium alginate and hydrocortisone, while another one - with a composition of sodium alginate and mexidol in a therapeutically effective amount. The nonwoven material of the surface density 160-180 g/m2 of the form congruent to the electrodes is laid under the U-cathodes. The material is coated with the composition of sodium alginate and urea in a therapeutically effective amount. The procedures are daily. The nonwoven material is kept after the procedure for another 10 - 20 minutes. The therapeutic course is 5-10 procedures.
EFFECT: method provides the comfortable procedure ensured by the soft plastic form of the non-woven material, mucus absorbability from the nasal passages onto the sodium alginate, improved nasal breathing, loss of the conductive component with the objective hearing improve.
SUBSTANCE: invention relates to medicine, namely to oncology. At the first stage ultrasound examination is performed to patients through anterior abdominal wall with present filling of urinary bladder. At the second stage retrograde filling of urinary bladder is performed through urethral catheter with furacilinum solution under dynamic transrectal ultrasound control until adequate filling of urinary bladder. State of internal surface of urinary bladder mucosa and external contours with gradual smoothing of walls is assessed. Presence of tumour formation, their quantity are detected, their true dimensions, localisation and spread are made more exact. After that Dopplerography is carried out in modes of colour and energy Doppler mapping for differential diagnostics of urinary bladder formations: neoplasm, concrement, chronic inflammation, blood clot. In addition, mobility and interposition of urinary bladder walls relative to adjacent organs of minor pelvis and intracavitatary neoplasms are detected.
EFFECT: method makes it possible to assess invasive processes in zone of direct location of tumour in urinary bladder lumen and commissural-infiltrative changes in paravesical cellular tissue, as well as possibility of diagnosing presence of tumour formations with dimensions to 1,0 cm and larger.
SUBSTANCE: invention relates to medicine, namely to oncology, and can be used for treatment of cancer of sigmoid colon in women. For this purpose surgery on sigmoid colon is performed. After that, typical supravaginal amputation of uterus with appendages and ablation of peritoneum of rectouterine space are carried out. After that, drainage of pelvis minor cavity is performed by means of tube through cervical canal. Then, on the 5-th day after post-operative period 5-fluorouracil in dose 750 mg per 100 ml of physiological solution is introduced drop-by-drop via tube training pelvis minor through cervical canal, with further drainage tube shut off for 3 hours.
EFFECT: method ensures reduction of frequency of development of distant metastases into ovaries and peritoneum of rectouterine space after surgery in said group of patients.
SUBSTANCE: invention relates to medicine, namely to surgery and medical equipment and can be applied in carrying out fistulography under control of X-ray photography or computer planigraph for visualisation of rectum and anal canal. Endoanorectal scale is made with application of the principle of X-ray contrast, in form of calibrated tube. Tube is made from flexible elastic material and connected with catheter for pumping X-ray contrast solution. Tube diameter constitutes 0.2-2.0 cm. Tube contains rounded X-ray contrast tip and openings, through which X-ray contrast gets into anal canal and sinus tract of rectum. Inside tube one basic and, at least, two additional X-ray contrast labels with step from 3 to 5 mm are placed.
EFFECT: invention ensures accuracy of rectum and internal fistula opening visualisation in case of fistulography, safety and impermeability in introducing into anal canal and rectum.
SUBSTANCE: invention refers to medicine, namely traumatology and orthopaedics, and may be used for treating Legg-Calve-Perthes disease. That is ensured by ultrasonic-controlled therapeutic injections into a hip joint. The above therapeutic agent is a mixture of Perftoran and Dimexidum in ratio (wt %): Dimexidum - 14-18, Perftoran - the rest. An amount of the therapeutic agent for each injection makes 4-5 ml.
EFFECT: method provides reducing the length of the repair of necrotised femoral head tissue, and pain relief with no analgesics and anti-inflammatory drugs ensured by blood flow recovery in the ischemic joint and subchondral bone tissue including by the specified ratio of Perftoran and Dimexidum.
2 cl, 3 ex
SUBSTANCE: apparatus may comprise: a dilator, a wire guide, a handle and an extended trunk with its proximal end coupled with the handle and reaching a distal end. The wire guide extends through at least a portion of a trunk lumen. The dilator has an unexpanded configuration and an expanded configuration. A sliding element is coupled with the wire guide and (or) the dilator through a long slot for projecting the wire guide and (or) dilator in relation to the trunk.
EFFECT: invention refers to medicine and may be used for the dilation of a human or animal paranasal sinus.
13 cl, 20 dwg
SUBSTANCE: group of inventions refers to medicine. According to the first version, a rectal drainage system comprises a tubular member, an insufflation bulb on a first distal end of the tubular element for rectal retention, a non-insufflation assisted lumen and a pressure sensor. The tubular element specifies the drainage passage for rectal excretion. The non-insufflation assisted lumen is connected with the insufflation bulb. The pressure sensor is attached to the assisted lumen to indicate the pressure level in the bulb when used in the rectum. The above pressure sensor comprises a first mechanical element having a three-dimensional deformable profile configured to switch over the first and second physical profiles depending on the fact if the sensed pressure is (i) a bulb insufflation pressure approaching a working level or (ii) a bulb insufflation pressure below the pre-set level. According to the second version, the rectal drainage system comprises the tubular member, the insufflation bulb on the first distal end of the tubular element for rectal retention, the first assisted lumen, the second assisted lumen and the pressure sensor. The tubular element specifies the drainage passage for rectal excretion. The first assisted lumen connected with the insufflation bulb for passing the insufflation fluid between the bulb and insufflation port for providing bulb insufflation and release. The second assisted lumen is connected for providing the direct pressure sensing in the bulb regardless of the dynamic pressure decay in the first lumen. The pressure sensor is attached to the second assisted lumen to indicate the pressure level visually in the bulb when used in the rectum. The above pressure sensor comprises the first mechanical element having the three-dimensional deformable profile configured to switch over the first and second physical profiles depending on the fact if the sensed pressure is (i) a bulb insufflation pressure approaching a working level or (ii) a bulb insufflation pressure below the pre-set level.
EFFECT: inventions provide improved operation flexibility and simplicity of using the rectal drainage systems.
10 cl, 8 dwg
SUBSTANCE: invention refers to medical equipment, namely to implanted tissue expanders. The implanted tissue expander comprises an integral elastic deformable internal skeleton element and a vacuum enclosure. The skeleton element extends between a carrier surface and an external surface, and comprises at least one set of mould elongated cells extending along substantially mutually parallel axes from the carrier surface, and limited by elastic walls of the elongated cells. The vacuum enclosure seals the mentioned skeleton element and adapted to prevent the mentioned set of the elongated cells from filling with body fluids.
EFFECT: method for making the implanted tissue expander involves formation of the internal elastic deformable skeleton element and formation of the peripheral enclosure above the internal skeleton element.
25 cl, 19 dwg
SUBSTANCE: invention relates to medical equipment. A method for manufacturing of a device involves braiding of shape memory metallic fibres in a tubular metal lath to make a braided configuration. A lath end is fixed to prevent untwisting. The lath is arranged in or on a moulding structure of a first preset shape containing a number of enlarged spherical or ovaloid segments chained by intermediate links. The moulding structure is heated to higher temperature for a period of time sufficient for heat shrinkage of the lath in the first preset shape for keeping the first preset shape when the medical device is found in a relaxed condition. The metal lath of the first preset shape is modelled into a second preset shape by rolling up to keep the second preset shape when said device is found in a relaxed condition. What is disclosed is a device produced by this method.
EFFECT: decreased press-through efforts and increased thrombus formation rate.
31 cl, 9 dwg
SUBSTANCE: pneumoperitoneum is enabled by connection of a cavity to an electronic insufflator. Then, gas is injected into the cavity, and a running pressure rating (Pair) and a volumetric gas discharge (Fcur) are measured to ensure Pcur=Ppst provided Fcur≤Fpst, where Ppst is a preset maximum endocavitary pressure rating, Fpst is a preset maximum volumetric gas discharge. Thereafter, a support mode is established with setting an endocavitary pressure rating equal to a safe endocavitary pressure rating (Psafe). The Psafe value is set when observing dPcur/dV=40-100 mm Hg/l where V is an insufflated gas volume.
EFFECT: safe and optimal lifting of an abdominal wall for exploration of abdominal organs.
SUBSTANCE: invention relates to medical equipment. A cardiosurgical complex comprises a stent placed on a balloon catheter in the form of a tube. On a distal end of said tube, there are available a balloon segment and radiopaque markers limiting its length. The balloon catheter has a shaft for a first coronary conductor, a shaft for a contrast medium and a longitudinal through passage for a second coronary conductor. The latter represents a flexible tube which is outside of the balloon segment and the stent in the immediate proximity thereto along the tube of the balloon catheter and contacting it along the whole length of the flexible tube for the second conductor. The flexible tube is provided with an inlet in a termination point of the proximal side of the balloon segment and has length 15-30 cm.
EFFECT: cardiosurgical complex allows eliminating stenosis with high-accurate stent positioning when the stenosis is arranged: in an artery mouth or in a point immediately after origin of a lateral artery.
1 cl, 1 dwg, 1 ex
SUBSTANCE: invention relates to medical equipment, particularly to external nasal dilators used for reduction of snore and other respiratory disorders, intended for two opposite actions. Nasal dilator is applied to nose for nasal tissue dilation and includes spring-loaded layer and skin contact layer. Spring-loaded layer features material with initial latent state of minimum spring load and active state of enhanced spring load. Active state is reached in 5-30 minutes after application of nasal dilator due to air, light, humidity, temperature, shock or compression effects on the spring-loaded layer.
EFFECT: sufficient time for hydrocolloid gluing substance attachment.
15 cl, 3 dwg
SUBSTANCE: dilatant includes armature supplied with mounting flakes on its ends. The armature contains central extranasal part and two intranasal parts. The extranasal part is of general U-type form which central part is elastic and moves alae of nose apart owing to back spin, at that end of each of the U-branches also has a U-type form, its one branch is a part of the extranasal part of armature, and other branch, placed between the branches of extranasal part of armature, forms one of the forementioned intranasal parts.
EFFECT: provision of practicable and effective construction dissimilar with its simplicity and secure mounting.
12 cl, 3 dwg
SUBSTANCE: inventions refer to medicine and can be used for obesity treatment. Said device and method consist in designing a framework with a wall forming a cavity. The wall is matched in shape and dimensions with an abdominal segment of oesophagus and/or esophagogastric transition, and/or a proximal segment of the patient's stomach. The wall is designed to exert a radial pressure on the abdominal segment of oesophagus and/or esophagogastric transition, and/or the proximal segment of the patient's stomach or cardiac opening.
EFFECT: inventions ensure minimally invasive procedure to effect on neurohormonal feedback mechanism causing sensations of stomach overfill in the absence of food.
40 cl, 15 dwg
SUBSTANCE: invention relates to medical equipment, namely to devices and methods for recovering blood flow in occluded blood vessels and for passing occlusions. Drill for passing in distal direction of occlusion in vessel contains working part of drill, which has flexible and elastic arch located on tangent line to rod and longitudinally superposed with distal end of rod. Arc has proximal end, rigidly connected with rod, arc back and distal end. Working part of drill is made with possibility to perform non-traumatic repeated operation in sequence, including bending of arc into arch-like condition with radial outward widening and release into unbent and straightened state, and vice versa. Arc of drill working part has convex surface, when it is bent in arch-like way, and working tip. In arch-like state working tip and convex surface of arc back are made with possibility to form, respectively, fixation of tip and fixation of arc in occlusion tissue, which are placed opposite to each other with space separation. Arc is made with possibility of asymmetric extension in radial direction outwards.
EFFECT: passing occlusion irrespective of operator's qualification and skill, as well as prevention of traumatic injury of vessels.
25 cl, 26 dwg
SUBSTANCE: invention refers to medicine, and represents a double-cylinder catheter for obstetrics. The catheter comprises a uterine and vaginal cylinders respectively provided with an axial tube of the uterine cylinder and an axial tube of the vaginal cylinder; the axial tube of the uterine cylinder is coaxial to the axial tube of the vaginal cylinder; it is possible to trace the cylinder distance variations along a longitudinal axis of the device; the vaginal cylinder is attached to a distal end of the axial tube of the vaginal cylinder, while the distal end of the axial tube of the vaginal cylinder is shaped so that to be adjusted to the anatomical cervical contours.
EFFECT: device enables reducing blood loss and collecting the blood lost.
7 cl, 2 ex, 1 dwg