33 results about "Inside the blood vessel" patented technology

An indicator device for visually indicating a pressure of blood inside a blood vessel includes: a body, the body comprising a duct extending in the body and having a sealed proximal end; a distal end portion adapted to be positioned inside the blood vessel and including a liquid inlet opening in fluid communication with the duct; and a window including an at least semi-transparent section configured to enable visual observation of blood entering into the duct via the inlet opening when the inlet opening is located inside the blood vessel.

A method of characterizing conditions in a tissue, by (a) providing a catheter that has a light source that emits light in selected wavenumbers within the range of mid-IR spectrum; (b) directing the light from the catheter to an area of tissue at a location inside a blood vessel of a subject; (c) collecting light reflected from the location and generating a reflectance spectra; and (d) comparing the reflectance spectra to a reference spectra of normal tissue, whereby a location having an increased number of absorbance peaks at said selected wavenumbers indicates a tissue inside the blood vessel containing a physiological marker for atherosclerosis.

The invention discloses a lung tissue model for biotoxicity detection and a biotoxicity detection method. The lung tissue model comprises a trachea, a blood vessel and an alveolus pulmonis unit, wherein an air passage is defined in the trachea, and an air inlet and an air outlet, which are communicated with the air passage respectively are formed at two ends of the trachea; a blood passage is defined inside the blood vessel, and a liquid inlet and a liquid outlet which are communicated with the blood passage respectively are formed at the two ends of the blood vessel, a cavity is defined in the alveolus pulmonis unit, an elastic ventilate membrane is formed on the wall of the alveolus pulmonis unit, the alveolus pulmonis unit is arranged in the blood passage, and the cavity is communicated with the air passage. By adopting the lung tissue model, an air exchanging function and a breathing strain effect of the lung blood in the body can be simulated; through planting cells in the alveolus pulmonis unit, the structure and function of the alveolus pulmonis unit in a body and inflammation reaction of immune cells can be simulated in the subsequent culture process.

Disclosed herein is a stent which is inserted into a blood vessel of a patient who has to undergo hemodialysis. The stent includes a wire frame which has a hollow cylindrical structure, and a window which is formed in a partial portion of a circumferential surface of the wire frame. The window has no wire therein. According to one aspect of the invention, the stent may further comprise a graft which covers the stent. Such a structure allows puncturing using a needle and inserting the needle into the window of the stent inside the blood vessel of the patient who has to periodically undergo hemodialysis, so as to makes it possible for hemodialysis to be reliably conducted for the patient who receives the treatment of inserting the covered stent due to arterial aneurysm. In this way, the present invention can solve problems not only of deformation of the covered stent which occurs when a hemodialysis needle is inserted into the stent, but also of patient discomfort when having skin punctured, high cost, thrombopoiesis, a risk of recurrence, etc.

The invention discloses a lung tissue model for biotoxicity detection and a biotoxicity detection method. The lung tissue model comprises a trachea, a blood vessel and an alveolus pulmonis unit, wherein an air passage is defined in the trachea, and an air inlet and an air outlet, which are communicated with the air passage respectively are formed at two ends of the trachea; a blood passage is defined inside the blood vessel, and a liquid inlet and a liquid outlet which are communicated with the blood passage respectively are formed at the two ends of the blood vessel, a cavity is defined in the alveolus pulmonis unit, an elastic ventilate membrane is formed on the wall of the alveolus pulmonis unit, the alveolus pulmonis unit is arranged in the blood passage, and the cavity is communicated with the air passage. By adopting the lung tissue model, an air exchanging function and a breathing strain effect of the lung blood in the body can be simulated; through planting cells in the alveolus pulmonis unit, the structure and function of the alveolus pulmonis unit in a body and inflammation reaction of immune cells can be simulated in the subsequent culture process.

A trans-vascular surgical method includes forming an artificial opening in a blood vessel of a patient's vascular system at a substantially predetermined location and moving a distal end portion of a medical instrument through at least a section of the patient's vascular system and through the artificial opening. A surgical port device is disposed inside the blood vessel to inhibit blood from exiting the patient's vascular system through the artificial opening while permitting extension of the distal end portion of the medical instrument through the artificial opening. After moving the distal end portion of the medical instrument through the artificial opening, the medical instrument is operated to perform a medical procedure operation inside the patient.

The invention discloses a method for applying hot compress of a respiratory tract to treat diseases with hot air and a respiratory device. The method comprises heating cold air to a warm range relatively warm and comfortable for the respiratory tract to apply hot compress of the respiratory tract; hot air enables the blood vessels and respiratory muscles of the shrunk or spasmodic respiratory tract to have diastole and cause shrinkage reactions such as coughs, sneezes and the like to fade away; hot oxygen in hot air further enables a lung and red blood cells of people to be combined into hot blood so as to enlarge the blood flow of hot blood cycle, so that nasal mucus, sputamentum or other body fluids at inflammations or high water pressure congestion parts of the respiratory tract are also dispersed or evaporated along with hot blood cycle to cause a nasal cavity and tracheas to be smooth and easy; hot blood cycle can strengthen the blood power of carotid artery so as to be nutrient or strengthen the immunity of respiratory system, so that headache, faucitis and tonsillitis is quickly cured; moreover, the method is further beneficial to the effect of the whole body to hot oxygen, thereby strengthening the immunity of the whole body to diseases; and particularly for a fever patient, the method is easier to enable the fever patient to sweat, reduce hydraulic pressure inside the blood vessels, eliminate stagnation of blood stasis, soften tumor, diminish inflammation and bring down a fever.

The invention relates to the field of medical experimental equipment and particularly relates to a laboratory animal vascular intimal injury experimental facility. The laboratory animal vascular intimal injury experimental facility comprises a brush part and a handle part, wherein the brush part comprises a fixed assembly and bristles arranged on the outer peripheral surface of the fixed assembly or brush teeth arranged on the fixed assembly; the fixed assembly is connected with one end of the handle part; a diameter of the brush part is greater than or equal to an inner diameter of a vessel lumen of a laboratory animal and cannot be greater by 10 percent of the inner diameter of the vessel lumen of the animal at most. The laboratory animal vascular intimal injury experimental facility provided by the invention has a simple structure and is high in pertinence on an injured position; due to the case that the diameter of the brush part is slightly greater than or equal to the inner diameter of the vessel lumen, in the process that the brush part brushes back and forth inside the blood vessels, the bristles cannot damage a vascular intimal layer and hardly cause damage to a smooth muscle layer, so that interference of the smooth muscle layer to an experimental result is reduced.

The invention discloses a tomography system inside a blood vessel. The tomography system comprises an imaging catheter, an optical fiber movement controller, a tomography module, a data collecting module and a data processing and displaying module which are connected in sequence. The light emitted by the tomography module is transmitted to the imaging catheter through the optical fiber movement controller, the light is concentrated on a target blood vessel wall through the imaging catheter, and the optical fiber movement controller drives the imaging catheter to conduct rectilinear motion inside a target blood vessel at the same time of rotating at a high speed. The reflected light of different layers of the target blood vessel wall is collected and transmitted to the optical fiber movement controller and the tomography module in sequence by the imaging catheter, the tomography module demodulates the received reflected light into intensity information and then converts the intensity information into electrical signals, the data collecting module collects and transmits the electrical signals to the data processing and displaying module, and the data processing and displaying module processes, generates and displays cross-section image information of the blood vessel. By means of the tomography system inside the blood vessel, the high-speed tomography of the blood vessel can be achieved.

The cannula (1) for the drainage of blood vessels comprises: a tubular body (2) provided with a first end (2a) and with a second end (2b), the latter being intended to be inserted inside a blood vessel of a patient, and provided with at least one main channel (3) extending between the ends (2a, 2b), the tubular body (2) being movable between a home configuration and an extended configuration, in which the diameter of said main channel (3) is reduced with respect to the home configuration to allow it to be inserted into a patient's body; elastic means (6) associated with said tubular body (2) and adapted to counteract the displacement from the home configuration to the extended configuration; pressure detection means (7) for detecting the pressure inside the blood vessel which are associated with the tubular body (2); wherein the pressure detection means (7) comprise at least one pressure sensor (8) associated with the tubular body (2) in the proximity of the second end (2b), and wherein the pressure sensor (8) is arranged inside the main channel (3).

A filter device includes: a shaft having an intermediate coil wire between a proximal filter wire and a distal filter wire; a proximal filter on the proximal filter wire; and a distal filter on the distal filter wire. The intermediate coil wire is disposed to extend between downstream and upstream blood vessels to pass through a path of placement that leads to another downstream blood vessel. Both the filters have a contracted configuration for being delivered into the blood vessel and an expanded configuration for capturing an embolus inside the blood vessel. The proximal filter is oriented such that an inlet opening, for taking in the embolus, of a proximal filter body in the expanded configuration faces the distal side, and the distal filter is oriented such that an inlet opening, for taking in the embolus, of a distal filter body in the expanded configuration faces the proximal side.

The invention discloses a multifunctional nerve blocking puncture needle which comprises a needle tube and a needle head located at the front end of the needle tube. A support is connected to the tail end of the needle tube. A channel communicated with an inner cavity of the needle tube is formed inside the support. The support is sleeved with an elastic pressing body. A local anesthetic is contained between the elastic pressing body and the outer wall of the support. A hole for guiding the local anesthetic into the channel is formed in the support. During puncture, the local anesthetic is squeezed into the channel by pressing the elastic pressing body through fingers, and the negative pressure effect is formed between the elastic pressing body and the support after the fingers are loosened. If the needle head is punctured into a blood vessel, blood inside the blood vessel flows into the elastic pressing body so that judgment can be performed conveniently by medical workers, injection into the blood vessel is avoided, and therefore safety needed before injection can be ensured. The multifunctional nerve blocking puncture needle can be applied to nerve blocking puncture.