12 results about "Biological tissue" patented technology

A microwave device for the ablation of biological tissues including a coaxial antenna, including an internal conductor, surrounded by a layer of dielectric material, an external conductor coaxial to the dielectric metal tip electrically connected to the internal conductor, and a quarter wave impedance transformer including a sleeve made of dielectric material having a proximal end covered with a layer of metal, the metal extending over nearly a quarter wavelength of electromagnetic field in the dielectric at the operating frequency of the device or of odd multiples of the quarter wavelength, the layer of metal material being connected electrically to the external conductor.

The invention discloses an auxiliary device for minimally invasive surgery. The device comprises a clamping part, a locking part, a control line, a bendable catheter and a control part. A small magnetcan be further arranged at the rear end of the locking part. The control line controls the clamping part to open and close by taking gaps formed between two sides of the small magnet and the inner wall of the locking part as channels. An open circular groove in the front end of the control line is connected with a rear-end pin. The clamping part is driven by a connecting rod. When the control line moves towards the rear end, the clamping part is locked, and the connecting rod protrusion is clamped into a locking groove of a clamp cylinder. The control line is separated from the rear-end pin,and finally the control line presses an elastic buckle at the front end of a spring line. The bendable catheter is separated from the clamp cylinder. A standby magnet can be further added to the auxiliary device to improve magnetic force. The auxiliary device for minimally invasive surgery can accurately anchor and lift biological tissues, and is convenient for doctors to operate. The surgery efficiency and success rate are improved.

A system and a method is provided for assessing motion of a biological tissue of a subject including one or more superficial biological layers and a targeted biological layer. An optical perturbation is introduced within the one or more superficial biological layers but not within the targeted biological layer. A set of optical signal data is acquired preceding, during, or following the optical perturbation and, using the set of optical signal data, a set of optical characteristics is determined that is representative of light transiting the biological layers. Using the set of optical characteristics and a model of the biological layers, a target optical signal consistent with a target biological layer is separated and a movement of the desired biological tissue is determined using the target optical signal.

The invention relates to a pretreatment method of microchemical analysis of a pectoral fin strip of a Chinese sturgeon, and belongs to the technical field of biological monitoring environments. The pretreatment method includes the steps that a small section of the pectoral fin strip of the Chinese sturgeon is washed and dried in the air, the pectoral fin strip is fixed to a cube resin block, aftersolidification, the cube resin block is fixed to the upper surface of a bottom plate of a mold in an upright manner, a reagent is prepared, the reagent is added to the fixing mold to form cylindricalresin, the cylindrical resin is polished, the pectoral fin strip is transferred to a glass slide, and pectoral fin strip slices are formed, washed and then dried. According to the pretreatment methodof microchemical analysis of the pectoral fin strip of the Chinese sturgeon, on the premise of satisfying sample conditions required for microchemical analysis, combined with the body characteristicsof the biological tissue of pectoral fins of the Chinese sturgeon, pectoral fin strip samples of the Chinese sturgeon processed by the treatment method can meet the multiple analysis requirements ofelectron probe analysis, laser ablation inductively coupled plasma mass spectrometry and the like, and sample pretreatment methods required for microchemical analysis of the pectoral fin strips of various Chinese sturgeons are unified.

The invention relates to a layered storage device and a liquid nitrogen storage tank. The layered storage device comprises storage units and handles. The storage units are sequentially arranged from top to bottom. Each handle comprises a lifting rod and a hook arranged on the lifting rod, and the hooks are used for being hung on the liquid nitrogen storage tank. The multiple handles are arranged.The lifting rod of each handle is correspondingly connected with one storage unit. The storage units are arranged in sequence from top to bottom, and each storage unit is correspondingly connected with one handle. If the biological tissue specimen in one storage unit needs to be used, the required storage unit can be separately taken out, and the rest of the storage units do not need to be taken out, so that the situation that the freezing effect is influenced by the fact that the biological tissue specimen in the remaining storage units is in contact with the outside can be avoided. In addition, the storage units are sequentially arranged from top to bottom, the height space of the liquid nitrogen storage tank can be fully utilized, the space utilization rate of the liquid nitrogen storage tank is increased, and the storage capacity of the liquid nitrogen storage tank is increased.

The invention discloses an electrical stimulation pulse waveform real-time regulation and control method based on biological impedance, and the method comprises the steps: 1, measuring the impedance values of a biological stimulation site at different frequencies through a frequency sweeping mode, and obtaining a frequency-impedance spectrum curve; 2, according to the biological tissue equivalent RC circuit and the turning frequency interval thereof, a curve located in the turning frequency interval is intercepted from the frequency-impedance spectrum curve for data fitting, and an equivalent RC circuit relation formula is obtained; 3, constructing an electric pulse waveform regulation and control model; and step 4, inputting a preset electrical stimulation pulse and a frequency sweeping result into the electrical pulse waveform regulation and control model, and performing calculation analysis and screening to enable the electrical stimulation pulse waveform of the output voltage value to be consistent with the preset electrical stimulation pulse waveform. The invention also provides a device for regulating and controlling the model based on the electric pulse waveform. Through the electric pulse waveform regulation and control model provided by the invention, the problem of distortion of the electric stimulation pulse waveform is avoided, so that the electric stimulation treatment effect is improved.

The present disclosure provides a method for characterising a region of interest within or between biological tissue. The method comprises inserting at least a portion of a probe into the region of interest and directing electromagnetic radiation to the region of interest and receiving electromagnetic radiation from the region of interest using the probe in a direction that is transversal to a length of the probe. Further, the method comprises directing a fluid to the region of interest through a portion of the probe and analysing received electromagnetic radiation.

The invention belongs to the technical field of optical imaging, and particularly relates to a linear scanning-based optical imaging device and imaging method of stripe sequence slice. The linear scanning-based optical imaging device and imaging method aims to solve the problem that continuous imaging of the stripe sequence slice cannot be achieved by the prior art. The device comprises a stripe,a stripe coiling device, a stripe supply device, a word line light source, a linear array image sensor and an image processing unit, wherein the stripe is used for placing biological tissues sequenceslices in sequence, the stripe coiling device and the stripe supply device are respectively fixed with two ends of the stripe and are respectively used for rotating and coiling the stripe at a uniformspeed and supplying the stripe, the word line light source and the linear array image sensor are arranged at two sides or the same side of the stripe and are used for scanning the sequence slices under a stripe transmission state, and the image processing unit is used for receiving a series of linear array images sent from the linear array image scanning device and generating a stripe sequence slice image. By the linear scanning-based optical imaging device, the stripe is driven to transmit the slice by the stripe coiling device and the stripe supply device, the strips are sequentially scanned line by line by the linear array image sensor, the sequence image is finally generated by the image processing unit, and the image is high in resolution and low in distortion, and the image production efficiency is high.

The invention discloses a biological membrane tissue optical detection cutting method and system based on weak coherence interference. A die cutting assembly is placed above the biological tissue, and a biological membrane tissue is placed in the die cutting assembly; detecting the thickness of the target area of the biological membrane tissue through the die cutting assembly by using an optical coherence imaging (OCT) system; based on the thickness of the target area of the biological membrane tissue, a mold in a mold cutting assembly is controlled to cut the target area to obtain the artificial heart bioprosthetic valve leaflet. According to the invention, the micrometer precision and non-contact measurement of the thickness of the biofilm tissue can be realized, and the cutting of the artificial heart biovalve leaflets with uniform thickness can be realized quickly.