83 results about "Tissue viability" patented technology

Delivery of an implantable wireless receiver-stimulator (R-S) into the heart using delivery catheter is described. R-S comprises a cathode and an anode and wirelessly receives and converts energy, such as acoustic ultrasound energy, to electrical energy to stimulate the heart. Conductive wires routed through the delivery system temporarily connect R-S electrodes to external monitor and pacing controller. R-S comprises a first temporary electrical connection from the catheter to the cathode, and a second temporary electrical connection from the catheter to the anode. Temporary electrical connections allow external monitoring of heart's electrical activity as sensed by R-S electrodes to determine tissue viability for excitation as well as to assess energy conversion efficiency.

The invention is further directed to producing a cleaned, disinfected, and devitalized cartilage graft by optionally cleaning and disinfecting the cartilage graft; treating the cartilage graft in a pretreatment solution; treating the cartilage graft in an extracting solution; washing the extracted cartilage graft with a rinsing solution; and subsequently soaking the devitalized cartilage graft in a storage solution. The devitalized cartilage graft is essentially free from metabolically viable and / or reproductively viable cells and the rinsing solution is hypotonic solution or isotonic solution. The present invention is further directed to a cleaned, disinfected, and devitalized cartilage graft and a process for cleaning, disinfecting, and devitalizing cartilage grafts. The invention also relates to a process for repairing a cartilage defect and implantation of a cartilage graft into a human or animal by crafting the cartilage matrix into individual grafts, disinfecting and cleaning the cartilage graft, applying a pretreatment solution to the cartilage graft, removing cellular debris using an extracting solution to produce a devitalized cartilage graft, implanting the cartilage graft into the cartilage defect with or without an insertion device, and sealing the implanted cartilage graft with recipient tissue. The devitalized cartilage graft is optionally recellularized in vitro, in vivo, or in situ with viable cells to render the tissue vital before or after the implantation. The devitalized cartilage graft is also optionally stored between the removing cellular debris and the recellularizing steps.

Apparatus for monitoring a plurality of tissue viability parameters of a tissue layer element, in which two different illumination sources are used via a common illumination element in contact with the tissue. One illumination source is used for monitoring blood flow rate and optionally flavoprotein concentration, and collection fibers are provided to receive the appropriate radiation from the tissue. The other illuminating radiation is used for monitoring any one of and preferably all of NADH, blood volume and blood oxygenation state of the tissue element, and collection fibers are provided to receive the appropriate radiation from the tissue. In one embodiment, the wavelengths of the two illumination sources are similar, and common collection fibers for the two illuminating radiations are used. In another embodiment, the respective collection fibers are distanced from the illumination point at different distances correlated to the ratio of the first and second illuminating wavelengths.

A device for gathering image information about a region of tissue that has been exposed to a contrast agent and methods of use thereof. The device preferably includes night vision goggles, and an excitation source that generates light of a wavelength to activate the contrast agent. The excitation source preferably is attached to the night vision goggles and is capable of directing light to a target. A filter preferably is attached to the night vision goggles, wherein the filter passes light sufficient to form an image of the region of tissue, and wherein the image may be assessed to determine the viability of the region of tissue.

The present invention relates to a composition for controlling viability of a tissue including a potassium channel opener or adenosine receptor agonist, a compound for inducing local anaesthesia and a compound for reducing the uptake of water by a cell in the tissue. The present invention also realtes to the use of the composition accordng to the invention for controlling viability of a tissue.

Apparatus for determining the oxygenation state of at least one tissue element, comprising: a) illumination means for illuminating said tissue element with an illuminating radiation at a predetermined wavelength via at least one illumination location with respect to said tissue element, said illuminating radiation being at a wavelength within the NADH excitation spectrum or the Fp excitation spectrum; b) radiation receiving means and detection means for measuring the intensity of the corresponding NADH fluorescence or Fp fluorescence emitted by the tissue element at at least two predetermined wavelengths within the range of wavelengths comprised within the corresponding fluorescence emission spectrum.

A method for reversibly, or irreversibly, altering the permeability of cells, tissues or other biological barriers, to molecules to be transported into or through these materials, through the application of acoustic energy, is enhanced by applying the ultrasound in combination with devices for monitoring and / or implementing feedback controls. The acoustic energy is applied directly or indirectly to the cells or tissue whose permeability is to be altered, at a frequency and intensity appropriate to alter the permeability to achieve the desired effect, such as the transport of endogenous or exogenous molecules and / or fluid, for drug delivery, measurement of analyte, removal of fluid, alteration of cell or tissue viability or alteration of structure of materials such as kidney or gall bladder stones. In the preferred embodiment, the method includes measuring the strength of the acoustic field applied to the cell or tissue at the applied frequency or other frequencies, and using the acoustic measurement to modify continued or subsequent application of acoustic energy to the cell or tissue. In another preferred embodiment, the method further includes simultaneously, previously, or subsequently exposing the cell or tissue to the chemical or biological agent to be transported into or across the cell or tissue. In another preferred application, the method includes removing biological fluid or molecules from the cells or tissue simultaneously, previously or subsequently to the application of acoustic energy and, optionally, assaying the biological fluid or molecules.

A method for reversibly, or irreveribly, altering the permeability of cells, tissues or other biological barriers, to molecules to be transported into or through these materials, through the application of acoustic energy, is enhanced by applying the ultrasound in combination with means for monitoring and / or implementing feedback controls. The acoustic energy is applied directly or indirectly to the cells or tissue whose permeability is to be altered, at a frequency and intensity appropriate to alter the permeability to achieve the desired effect, such as the transport of endogenous or exogenous molecules and / or fluid, for drug delivery, measurement of analyte, removal of fluid, alteration of cell or tissue viability or alteration of structure of materials such as kidney or gall bladder stones. In the preferred embodiment, the method includes measuring the strength of the acoustic field applied to the cell or tissue at the applied frequency or other frequencies, and using the acoustic measurement to modify continued or subsequent application of acoustic energy to the cell or tissue. In another preferred embodiment, the method further includes simultaneously, previously, or subsequently exposing the cell or tissue to the chemical or biological agent to be transported into or across the cell or tissue. In another preferred application, the method includes removing biological fluid or molecules from the cell or tissue simultaneously, previously or subsequently to the application of acoustic energy and, optionally, assaying the biological fluid or molecules.

A surgical instrument having a tissue vitality comparator is provided to view images of tissue relative to the surgical instrument and compare the images with predetermined reference images. The surgical instrument includes a pair of jaws for capturing tissue and one or more light sources 14 illuminating the captured tissue. The surgical instrument additionally includes a light pipe with fiber optic imaging bundle having a first end for viewing the tissue between the jaws and a second end on a handle portion of the surgical instrument for observing the tissue. A tissue comparison chart having a plurality of reference images is provided on the handle of the surgical instrument for comparison with the image observed through the second end of the light pipe with fiber optic imaging bundle.

The invention relates to a toothpaste containing coenzyme Q10 and a preparation method thereof, in particular to a composition of toothpastes, belonging to the field of oral healthcare products; based on weight percentage, the coenzyme Q10 in the toothpaste is 1-2% and Chinese herbal extract is 0.5-2%; the rest of accessories are conventional materials for preparing toothpastes. The formulation proportion of the components in the toothpaste is preferably as follows: 2% of coenzyme Q10 mixture, 0.7% of Chinese herbal extract, 35% of abradant, 1.5% of bonding agent, 35% of wetting agent, 0.2% of flavoring agent, 2.5% of foaming agent, 1.5% of essence and 21.6% of deionized water. The toothpaste containing coenzyme Q10 has the healthcare functions the same as the common toothpastes, such as brightening and cleaning the teeth, stopping bleeding of gums and healing oral ulcer; besides, the coenzyme Q10 and Chinese herbal extract permeate the gum cell membrane so that the gum cell obtains energy and tissue vigor is strengthened, thereby essentially conserving the gums, preventing periodontitis, gingivitis and gingival atrophy to reach the aim of strengthening the gums and fixing teeth.

An apparatus, system and method are provided for diagnosing the degree of body metabolic emergency state. A non-vital organ with respect to the metabolic emergency state is first chosen. One or more tissue viability parameters including at least one of NADH and Flavoprotein (Fp) concentration are monitored in the non-vital organ, whereupon the degree of body metabolic emergency state may be determined based on the monitored tissue viability parameters.

Apparatus for monitoring a plurality of tissue viability parameters of a substantially identical tissue element, in which a single illumination laser source provides illumination radiation at a wavelength such as to enable monitoring of blood flow rate and NADH or flavoprotein concentration, together with blood volume and also blood oxygenation state. In preferred embodiments, an external cavity laser diode system is used to ensure that the laser operates in single mode or at else in two or three non-competing modes, each mode comprising a relatively narrow bandwidth. A laser stabilisation control system is provided to ensure long term operation of the laser source at the desired conditions.

Prolonged and severe tissue hypoxia results in tissue necrosis in pedicled flaps. We demonstrate the potential of near-infrared spectroscopy for predicting viability of compromised tissue portions. This approach clearly identifies tissue regions with low oxygen supply, and also the severity of this challenge, in a rapid and non-invasive manner, with a high degree of reproducibility. Early, nonsubjective detection of poor tissue oxygenation following surgery increases the likelihood that intervention aimed at saving the tissue will be successful.

Several embodiments relate to methods of repairing and / or regenerating damaged or diseased tissue comprising administering to the damaged or diseased tissues compositions comprising exosomes. In several embodiments, the exosomes comprise one or more microRNA that result in alterations in gene or protein expression, which in turn result in improved cell or tissue viability and / or function.

The present invention is directed to a method for combining assessment of different factors of dyssynchrony into a comprehensive, non-invasive toolbox for treating patients with a CRT therapy device. The toolbox provides high spatial resolution, enabling assessment of regional function, as well as enabling derivation of global metrics to improve patient response and selection for CRT therapy. The method allows for quantitative assessment and estimation of mechanical contraction patterns, tissue viability, and venous anatomy from CT scans combined with electrical activation patterns from Body Surface Potential Mapping (BSPM). This multi-modal method is therefore capable of integrating electrical, mechanical, and structural information about cardiac structure and function in order to guide lead placement of CRT therapy devices. The method generates regional electro-mechanical properties overlaid with cardiac venous distribution and scar tissue. The fusion algorithm for combining all of the data suggests cardiac segments and routes for implantation of epicardial pacing leads.

Delivery of an implantable wireless receiver-stimulator (R-S) into the heart using delivery catheter is described. R-S comprises a cathode and an anode and wirelessly receives and converts energy, such as acoustic ultrasound energy, to electrical energy to stimulate the heart. Conductive wires routed through the delivery system temporarily connect R-S electrodes to external monitor and pacing controller. R-S comprises a first temporary electrical connection from the catheter to the cathode, and a second temporary electrical connection from the catheter to the anode. Temporary electrical connections allow external monitoring of heart's electrical activity as sensed by R-S electrodes to determine tissue viability for excitation as well as to assess energy conversion efficiency.

The present invention relates to surgical instruments and methods for enhancing properties of tissue repaired or joined by surgical staples and, more particularly to surgical instruments and methods designed to enhance the properties of repaired or adjoined tissue at a target surgical site, especially when sealing an anastomosis between adjacent intestinal sections so as to improve tissue viability, prevent tissue infection, and to prevent leakage. The present invention further relates to an expandable compression device for application to anastomotically joined tubular tissues, comprising: an upper ring-shaped or disk-shaped flange at a distal end of said device connected to a lower ring-shaped inflatable flange at a proximal end of said device via a hollow cylindrical tubular body, with an opening forming an axial passage through said upper flange, lower flange, and tubular body.

Several embodiments relate to methods of repairing and / or regenerating damaged or diseased tissue comprising administering to the damaged or diseased tissues compositions comprising exosomes. In several embodiments, the exosomes comprise one or more microRNA that result in alterations in gene or protein expression, which in turn result in improved cell or tissue viability and / or function.

Delivery of an implantable wireless receiver-stimulator (R-S) into the heart using delivery catheter is described. R-S comprises a cathode and an anode and wirelessly receives and converts energy, such as acoustic ultrasound energy, to electrical energy to stimulate the heart. Conductive wires routed through the delivery system temporarily connect R-S electrodes to external monitor and pacing controller. R-S comprises a first temporary electrical connection from the catheter to the cathode, and a second temporary electrical connection from the catheter to the anode. Temporary electrical connections allow external monitoring of heart's electrical activity as sensed by R-S electrodes to determine tissue viability for excitation as well as to assess energy conversion efficiency.

Methods and apparatus for assessing the viability of tissue such as flap tissue are disclosed. According to one aspect of the present invention, a method for assessing the viability of flap tissue includes obtaining an oxygen saturation level associated with a first location on the flap tissue, determining whether the oxygen saturation level is less than a first level, and identifying the first location as having a poor blood supply if the oxygen saturation level is less than the first level.

Prolonged and severe tissue hypoxia results in tissue necrosis in pedicled flaps. We demonstrate the potential of near-infrared spectroscopy for predicting viability of compromised tissue portions. This approach clearly identifies tissue regions with low oxygen supply, and also the severity of this challenge, in a rapid and non-invasive manner, with a high degree of reproducibility. Tissues remaining below a certain hemoglobin oxygen saturation threshold (oxygen saturation index <1) for prolonged periods (>6 h) became increasingly dehydrated, eventually becoming visibly necrotic. Tissues above this threshold (oxygen saturation index >1), despite being significantly hypoxic relative to the pre-elevation saturation values, remained viable over the 72 h post-elevation monitoring period. The magnitude of the drop in tissue oxygen saturation, as observed immediately following surgery, correlated with the final clinical outcome of the flap tissue. These results indicate the potential of near infrared spectroscopy and imaging to monitor tissue oxygenation status and assess tissue viability following reconstructive surgery. Early, nonsubjective detection of poor tissue oxygenation following surgery increases the likelihood that intervention aimed at saving the tissue will be successful.

A flexible dressing for applying to a tissue site for determining the extent of debridement required to remove non-viable tissue is disclosed. Some embodiments of the dressing may be in the form of a multi-layer drape having an integrated tissue viability indicator system. Some embodiments may also include a system of shapes or a grid pattern printed or embossed on a surface of the drape for providing guidance during an ensuing debridement or amputation procedure.

The invention discloses a low-temperature preserved solid culture medium used for a tissue engineering skin model and a preservation method of the low-temperature preserved solid culture medium. The low-temperature preserved solid culture medium is prepared by the following steps: adding a low-temperature protection agent into a common culture medium for epidermis cells to prepare a basic culture solution; and mixing the basic culture solution with agarose gel and condensing to form the solid culture medium suitable for the skin model. The tissue engineering skin model is embedded into the culture medium, is preserved at 4-8 DEG C for 24-72 hours, and then is resuscitated by a common epidermis cell culture solution. The solid culture medium can be used for reducing tissue activity reduction and structure damages of cells and skin tissues, caused by a low-temperature preservation condition, to the greatest extent.

The present invention relates to surgical instruments and methods for enhancing properties of tissue repaired or joined by surgical staples and, more particularly to surgical instruments and methods designed to enhance the properties of repaired or adjoined tissue at a target surgical site, especially when sealing an anastomosis between adjacent intestinal sections so as to improve tissue viability, prevent tissue infection, and to prevent leakage.

The invention belongs to the technical field of production and preparation of health bedding fabrics for teenagers, and relates to a far infrared anti-electromagnetic wave body-perfuming sleeping bag used for teenagers, comprising nano selenium and traditional Chinese medicinal materials and capable of generating negative ions. Oxygen is necessary for life, life activities can not continue without oxygen, and a brain will die if no oxygen gas is supplied for 5 minutes, while 20% of oxygen forms oxygen radicals which are harmful for a human body during metabolism. The metallothionein in nano selenium-containing bee products has the effect of strongly scavenging free radicals, the nano powder of medical stone or tourmaline has a far infrared anti-electromagnetic wave function, and the molecules of nano silver antimicrobial agent and traditional Chinese medicinal materials such as sweet osmanthus flower, jasmine flower and peach flower penetrate into deep skin tissues at a depth of 3-5 mm. The sleeping bag provided by the invention can be automatically heated, and has the effects of promoting metabolism, tissue vitality and blood circulation and perfuming skin. The spontaneously generated negative ions have the effects of regulating surrounding air quality, enhancing immunity, and strongly killing bacteria and mites.

A method for reversibly, or irreversibly, altering the permeability of cells, tissues or other biological barriers, to molecules to be transported into or through these materials, through the application of acoustic energy, is provided. The acoustic energy is applied indirectly to the cells or tissue whose permeability is to be altered, at a frequency and intensity appropriate to alter the permeability to achieve the desired effect, such as the transport of endogenous or exogenous molecules and / or fluid, for drug delivery, measurement of analyte, removal of fluid, alteration of cell or tissue viability or alteration of structure of materials. In the preferred embodiment, the method includes applying the ultrasound in combination with devices for monitoring and / or implementing feedback controls.

A method of performing a surgical procedure includes generating an infrared image of tissue using a thermographic camera, analyzing the infrared images to determine blood flow characteristics of the tissue, and resecting a portion of the tissue determined to have abnormal blood flow characteristics.