42 results about "Pressure pain" patented technology

A system for distending body tissue cavities of subjects by continuous flow irrigation during endoscopic procedures, the system including: a fluid source reservoir containing a non viscous physiologic fluid meant for cavity distension; a fluid supply conduit tube connecting the fluid source reservoir to an inlet port of a variable speed positive displacement inflow pump and an outlet port of the said inflow pump being connectable to an inflow port of an endoscope instrument through an inflow tube for pumping the fluid at a controlled flow rate into the cavity, the flow rate of the said inflow pump being termed as the inflow rate; an inflow pressure transducer being located anywhere in the inflow tube between the outlet port of the inflow pump and the inflow port of the endoscope; an outflow port of the endoscope being connectable to a waste fluid collecting container via a waste fluid carrying tube, and characterized in that an active inflow pressure pulsation dampening means is connected to the inflow tube for dampening the pressure pulsations inside the cavity created by the positive displacement inflow pump.

The invention discloses a triaxial seepage stress temperature creep coupling experimental device based on a digital image. The triaxial seepage stress temperature creep coupling experimental device comprises a triaxial pressure chamber (1), a digital image observing system and a triaxial pressure chamber heating system, wherein a pore pressure applying system, a stable-pressure axial applying system and a surrounding pressure applying system are mounted on the triaxial pressure chamber (1); the pore pressure applying system comprises a pore pressure fluid injection tube (5), one end of the pore pressure fluid injection tube is connected with a first pressure pump (8); the first pressure pump (8) is used for providing pore pressure energy, the pressure value is measured by a digital pressure meter (9), and the pressure meter (9) is mounted on the pore pressure fluid injection tube (5). The triaxial seepage stress temperature creep coupling experimental device can be used for accurately and automatically measuring creep deformation by searching the influences of the surrounding pressure, the axial pressure, the hole pressure, the temperature and the creep deformation on coal permeability.

A system and a method for distending a body tissue cavity of a subject by continuous flow irrigation by using two positive displacement pumps, such as peristaltic pumps, one pump on the inflow side and another pump on the outflow side, such that the amplitude of the pressure pulsations created by the positive displacement pumps inside the tissue cavity is substantially dampened to almost negligible levels. The present invention also provides a method of reducing the frequency of the said pressure pulsations. The present invention also provides a method for accurately determining the rate of fluid loss, into the subject's body system, during any endoscopic procedure without utilizing any deficit weight or fluid volume calculation, the same being accomplished by using two fluid flow rate sensors.

Disclosed herein are a pure silver device and a method for diagnosing and treating pain on human body. The pure silver device comprises an elongated handle, a head having both a hammer head and a comb opposed to each other, a panel, and an outwardly extending protrusion on the bottom end of the handle. The pure silver device is used to diagnose and treat pain by finding out pressure pain points on both abdominal area, at which root of pain is located, and a symptomatic area of the human body and then by releasing the pressure pain points by tapping, pressing, rubbing, combing or combining the foregoing. Owing to the highest thermal and electrical conductivity of silver, the pure silver device produces amazingly better stimulation of the pressure pain points. Therefore, the pure silver device is more effectively used for diagnosing and treating pain than other devices made out of any other material, even sterling silver and magnetic material. In addition, the pure silver device is portable and useful in that anyone can diagnose and treat himself or herself anytime and anyplace. The pure silver device and the method are simple, easy, safe without any side effects and medical risks, and economical.

The invention provides a constant-temperature heating method suitable for CT (computerized tomography) scanning rock core displacement experiments and capable of stimulating oil reservoir conditions, which comprises the following steps: a confining pressure liquid is heated in a constant-temperature heating unit to a preset temperature and injected into a confining pressure space of a rock core holder at constant speed, and flows out through an outlet of the confining pressure space; the confining pressure of the rock core holder is controlled to a preset pressure by using a back-pressure valve; after being heated by the constant-temperature heating unit, the confining pressure liquid flowing out through the outlet of the confining pressure space and the confining pressure liquid entering an inlet of the confining pressure space form a cycle; the confining pressure liquid in the confining pressure space enables the rock core to reach the preset temperature and keep the temperature constant; and the constant-temperature heating unit is positioned outside the rock core, outside the rock core holder and outside the CT scanning area. The method achieves the effect constant-temperature heating and constant confining pressure without influencing the CT scanning, is used for CT scanning rock core tests, and solves the technical problem of providing high-temperature high-pressure conditions in CT scanning rock core displacement experiments.

A method is provided for detecting filter clogging which are able to keep track of the filter clogging with precision and in detail. At least one pressure selected from the group consisting of a pressure Pa in a blood inflow portion (32a), a pressure Pv in a blood outflow portion (32b), a pressure Pf1 in a filtrate inflow portion (32c), and a pressure Pf2 in a filtrate outflow portion (32d) is measured continuously, then a variation (pressure waveform) of the pressure is analyzed, a clogging of a filter (32) is detected using the analyzed result. Thereby a clogging of a filter is detected early. As a result, it is possible to prevent from developing of the filter clogging by controlling a dosage amount of anti-coagulant properly and changing a flow rate of blood. The variation of the pressure wave may be analyzed by subjecting the variable to Fast Fourier Transform.

The invention discloses a variable temperature and variable pressure probe for nuclear magnetic resonance detection, and a nuclear magnetic resonance detection method. The probe comprises a nuclear magnetic resonance detection system, a confining pressure applying system, a displacement pressure applying system and a variable temperature system; and the probe can simultaneously or separately realize the nuclear magnetic resonance detection of a test sample under applied confining pressure, applied displacement and variable temperature conditions. The nuclear magnetic resonance detection methodincludes the following steps: installation of the test sample, connection of a nuclear magnetic detection circuit, connection of the confining pressure applying system, connection of the displacementpressure applying system, connection of the variable temperature system, and testing. The probe has the advantages of high pressure resistance, low manufacturing cost and flexibility in testing.

The invention discloses a granular preparation for promoting blood circulation, dredging collaterals and relieving pain, a preparation method of the granular preparation, and a quality control method of the Chinese traditional medicine. The granular preparation of the invention is prepared from pharmaceutical excipients and a Chinese traditional medicine composition prepared from the following raw materials in parts by weight: 160-240 parts of white peony root, 40-60 parts of kudzu root, 40-60 parts of peach kernel, 40-60 parts of safflower, 40-60 parts of mastic, 40-60 parts of myrrh, 55-95 parts of teasel root, 55-95 parts of cibot rhizome, 55-95 parts of lycopodium clavatum, 40-60 parts of achyranthes, 40-60 parts of rehmannia and 15-35 parts of licorice. The granular preparation of the invention has stable granulation process and high quality controllability. The clinical test shows that the clinical total effective rate of the granular preparation of the invention for treating cervical spondylosis is 98.88%, the total effective rate of the control medicine for treating cervical spondylosis is 97.10%, and the state of an illness and main symptoms are improved obviously after treating. The effective rate for treating sciatica is 75.3%, the effective rate for treating hyperosteogeny is 82.7%, the effective rate for treating headache and dizziness caused by cervical spondylosis is 87.6%, the effective rate for treating waist pain and limitation of motion is 91.4%, the effective rate for treating shoulder and neck tenderness is 92.5%, the effective rate for treating neck pain and limitation of motion is 96.2%, and the effective rate for treating acroanesthesia is 98.5%. The clinical treatment effect of the granular preparation of the invention applied after the operation of prolapse of lumbar intervertebral disc (PLID) is as follows: the recovery rate of the sample group of the invention is 86.7%, and the recovery rate of the control group is 61%.

Disclosed herein is a brake system capable of reducing periodic pressure pulsation generated by operation of a pump. The brake system includes a damper member provided with a cylinder having a step portion and a piston to reciprocate between the cylinder and the cap. The piston may be prevented from being excessively pushed toward one side of the damper member, and pressure pulsation generated by operation of the pump may be attenuated. Therefore, overall operating noise may be reduced during control the brake and product reliability may be increased.

A method for measuring transverse hydraulic load at a runner of a hydro-generating unit relates to the method for determining the transverse hydraulic load at the runner by obtaining pressure pulsation in a tail pipe and displacement of a shaft neck at a water pilot bearing through experiments. The method comprises the following steps: a. a displacement signal of the shaft neck at the water pilot bearing, a pressure pulsation signal of the tail pipe and the frequency response feature of a shaft system of the hydro-generating unit are obtained through the experiments; b. amplitudes, frequencies and phases of main components of the pressure pulsation are obtained by analyzing the signal; c. the form of the transverse hydraulic load is assumed, and the frequency response feature is utilized to determine the flexibility coefficient of the shaft system under the action of the load; d. and the transverse hydraulic load is determined according to the maximum value of the displacement amplitude and the flexibility coefficient caused by the transverse hydraulic load. The method decomposes the transverse hydraulic load to the components with the different frequencies for superposition and measures the phase; furthermore, the pressure pulsation is the centralized reflection of the coupling action of various incentives in the tail pipe, and the obtained transverse hydraulic load is closer to the actual situation.

Disclosed is a method and apparatus for regulating tourniquet cuff pressure based on a personalized tourniquet pressure (PTP) to facilitate safe performance of a surgical procedure. The apparatus includes a dual-purpose tourniquet cuff adapted to encircle a region of a patient limb to provide both a sensor during a pre-surgical time period and an effector during a surgical time period. An effector module communicates pneumatically with an inflatable bladder of the cuff for maintaining pressure in the bladder near a PTP during the surgical time period to safely stop penetration of arterial blood past the cuff. A pulsation sensor that communicates pneumatically with the inflatable bladder during the pre-surgical time period senses and characterizes pressure pulsations that are indicative of penetration of arterial blood into the region of the limb encircled by the cuff. A PTP estimator is responsive to the pulsation sensor for producing an estimate of the PTP, such that the estimate of the PTP is a function of the sensed pulsations.

The invention relates to a device and method for standardized tracing of parts of pain and pressing pain of knee joints. The device includes a knee joint model, a transparent model shell and a round sticker, wherein the knee joint model has appearance and size similar to the appearance and size of a real human knee joint, the transparent model shell is of a hollow structure with certain elasticity, and has appearance the same as the appearance of the knee joint model, and the inner wall of the transparent model shell conforms to the outer wall of the knee joint model; and meshed divisional grids are arranged on the surface of the transparent model shell, each of the divisional grids is marked with a unique number, and the transparent model shell penetrates the surface of the knee joint model through a hollow structure. The device has the advantages that positions, distribution ranges and distribution rules of ending pressing pain of the knee joints of patients with knee arthritis can be described and recorded in a standardized mode, later study and treatment plan making can be carried out by the medical staff conveniently, and the curative effect is ensured.