Abstract: A biopsy site marker includes a marker element. The marker element includes a base portion and an anchor portion. The anchor portion extends distally from the base portion. The anchor portion includes a plurality of arms. Each arm of the plurality of arms is configured to be responsive to heat to transition from a pre-deployment configuration to a post-deployment configuration. Each arm of the plurality of arms extends outwardly from a longitudinal axis defined by the marker element when the plurality of arms are in the post-deployment configuration.

Abstract: A biopsy site marker includes a marker element. The marker element includes a base portion and an anchor portion. The anchor portion extends from the base portion. The anchor portion includes a plurality of arms. One or more arms of the plurality of arms is configured to be responsive to heat to transition from a pre-deployment configuration to a post-deployment configuration. Each transitioned arm of the plurality of arms extending outwardly from a longitudinal axis defined by the marker element when in the post-deployment configuration.

Abstract: The present invention relates to a medical instrument (1), comprising a tool (10), a catheter assembly and a handle (20), by means of which the tool (10) can be actuated, and to a method for producing the medical instrument. The tool (10) is a wire construction having at least two wire portions (11?, 11?, 12?, 12?, 13?, 13?) and is arranged at a distal end of the catheter assembly. The catheter assembly is formed from an outer tube (3) and an inner tube (4), which is arranged coaxially to the outer tube. Furthermore, the medical instrument (1) has an optical waveguide (2), which extends through the inner tube (4) and the exit end (2?) of which opens into a space delimited by the tool (10). At least one first wire portion (11?, 12?, 13?) is fastened, at a proximal end (11a, 12a, 13a) thereof, to the distal end of the inner tube (4), and at least one second wire portion (11?, 12?, 13?) is fastened, at a proximal end (11b, 12b, 13b) thereof, to the distal end of the outer tube (3).

Abstract: A marking body, a method for producing a marking body and a method for using a marking body are disclosed. In an embodiment a marking body includes a self-expanding structure of a shape-memory metal, wherein the shape-memory metal forms a tubular structure that has at least two elongated openings along its length that extend no further than from a head section to a foot section of the tubular structure, wherein the tubular structure comprises at least one stripe of the shape-memory metal located between two adjacent elongated openings, and wherein the tubular structure is configured to be compressed when in an application condition and configured to be stretched when in a non-application condition.

Abstract: The present invention relates to a catalyst for reacting carbonitriles with water, wherein the catalyst comprises at least 60% by weight of manganese dioxide with an empirical formula MnOx where x is in the range from 1.7 to 2.0, and at least one plasticizer. The present invention further relates to a process for preparing the catalysts detailed above and to a process for preparing carboxamides by reacting carbonitriles with water in the presence of the present catalyst.

Abstract: The invention relates to a method for producing a carboxylic acid amide from a carbonyl compound and hydrocyanic acid, comprising the steps of A) reacting a carbonyl compound with hydrocyanic acid to produce a hydroxycarboxylic acid nitrile, B) hydrolysis of the hydroxycarboxylic acid nitrile obtained in step A) in the presence of a catalyst comprising manganese dioxide, wherein a molar excess of carbonyl compound is used in relation to the hydrocyanic acid to react the carbonyl compound with hydrocyanic acid according to step A), and the reaction mixture obtained in step A) is not purified by distillation before the hydrolysis according to step B) is carried out. The invention furthermore relates to a method for producing alkyl(meth)acrylates from polymers, moulding compounds and moulded bodies, wherein a method for producing a carboxylic acid amide from a carbonyl compound and hydrocyanic acid is carried out in accordance with the method described above.

Abstract: The present invention relates to processes for transesterification, comprising the steps of A) mixing an organic acid a) with an ester b) and B) transferring the alcohol radical of the ester b) to the acid a) to obtain the ester of the acid a) and the acid of the ester b), step B) being carried out in a still.

Abstract: Alpha-hydroxycarboxylic esters are prepared by a continuous process in which alpha-hydroxycarboxamide is reacted with an alcohol in the presence of a catalyst to obtain a product mixture which contains alpha-hydroxycarboxylic ester, ammonia, unconverted alpha-hydroxycarboxamide and alcohol, and catalyst; wherein reactant streams containing an alpha-hydroxycarboxamide, an alcohol and a catalyst are fed into a pressure reactor. The reactant streams are reacted with one another in the pressure reactor at a pressure in the range of 1 bar to 100 bar; and the product mixture is depleted in alcohol and ammonia by distilling off ammonia at a pressure which is constantly kept greater than 1 bar without the aid of additional stripping media. The continuous process can be employed particularly advantageously on the industrial scale.

Abstract: In a compression sleeve for the local enclosure of a blood vessel or vein area comprising a retaining structure of a biocompatible material, the retaining structure is a flexible mat consisting of a mesh or net-like structure provided with an arrangement holding the retaining structure in a vein enclosing position.

Abstract: The present invention relates to a process for preparing carboxamides by hydrolysing carbonitriles in the presence of a catalyst comprising manganese dioxide, wherein the reaction mixture added to the catalyst comprising manganese dioxide has a pH in the range of 6.0 to 11.0 and the hydrolysis is performed in the presence of an oxidizing agent. The present invention further relates to a process for preparing alkyl (meth)acrylates, the process having a hydrolysis step according to the process described above.

Abstract: The invention relates to a method for producing a carboxylic acid amide from a carbonyl compound and hydrocyanic acid, comprising the steps of A) reacting a carbonyl compound with hydrocyanic acid to produce a hydroxycarboxylic acid nitrile, B) hydrolysis of the hydroxycarboxylic acid nitrile obtained in step A) in the presence of a catalyst comprising manganese dioxide, wherein a molar excess of carbonyl compound is used in relation to the hydrocyanic acid to react the carbonyl compound with hydrocyanic acid according to step A), and the reaction mixture obtained in step A) is not purified by distillation before the hydrolysis according to step B) is carried out. The invention furthermore relates to a method for producing alkyl(meth)acrylates from polymers, moulding compounds and moulded bodies, wherein a method for producing a carboxylic acid amide from a carbonyl compound and hydrocyanic acid is carried out in accordance with the method described above.

Abstract: The present invention relates to a process for preparing (meth)acrylic acid, characterized in that a cyclic ester is converted to (meth)acrylic acid in the presence of a catalyst. The (meth)acrylic acid prepared can in particular be converted to (meth)acrylates.

Abstract: The invention relates to a method for producing a carboxylic acid amide from a carbonyl compound and hydrocyanic acid, comprising the steps of A) reacting a carbonyl compound with hydrocyanic acid to produce a hydroxycarboxylic acid nitrile, B) hydrolysis of the hydroxycarboxylic acid nitrile obtained in step A) in the presence of a catalyst comprising manganese dioxide, wherein a molar excess of carbonyl compound is used in relation to the hydrocyanic acid to react the carbonyl compound with hydrocyanic acid according to step A), and the reaction mixture obtained in step A) is not purified by distillation before the hydrolysis according to step B) is carried out. The invention furthermore relates to a method for producing alkyl(meth)acrylates from polymers, moulding compounds and moulded bodies, wherein a method for producing a carboxylic acid amide from a carbonyl compound and hydrocyanic acid is carried out in accordance with the method described above.

Abstract: The present invention relates to processes for preparing alkyl (meth)acrylates, comprising the steps of transesterifying an alkyl ?-hydroxycarboxylate with (meth)acrylic acid to obtain alkyl (meth)acrylates and ?-hydroxycarboxylic acid, and dehydrating the ?-hydroxycarboxylic acid to obtain (meth)acrylic acid.

Abstract: The present invention relates to a process for preparing tetramethylglycolide by heating a composition which comprises at least 50% by weight of 2-hydroxy-isobutyric acid and/or tetramethylglycolide to a temperature of at least 100° C.

Abstract: The present invention relates to a process for preparing carboxamides by hydrolysing carbonitriles in the presence of a catalyst comprising manganese dioxide, wherein the reaction mixture added to the catalyst comprising manganese dioxide has a pH in the range of 6.0 to 11.0 and the hydrolysis is performed in the presence of an oxidizing agent. The present invention further relates to a process for preparing alkyl (meth)acrylates, the process having a hydrolysis step according to the process described above.

Abstract: The present invention relates to a catalyst for reacting carbonitriles with water, wherein the catalyst comprises at least 60% by weight of manganese dioxide with an empirical formula MnOx where x is in the range from 1.7 to 2.0, and at least one plasticizer. The present invention further relates to a process for preparing the catalysts detailed above and to a process for preparing carboxamides by reacting carbonitriles with water in the presence of the present catalyst.

Abstract: The present invention relates to processes for removing sulfur compounds from hydrocarbonaceous gases by using catalysts, with the exception of activated carbons and zeolites, which comprise copper, silver, zinc, molybdenum, iron, cobalt, nickel or mixtures thereof at temperatures of from (?50) to 150° C. and a pressure of from 0.1 to 10 bar.

Abstract: In a device for the installation of a compression sleeve around a blood vessel, including a guide element for holding the blood vessel, and a carrier for holding the compression sleeve in a bent-open state in which the carrier and the compression sleeve are supported at the distal end of the installation device, the installation device includes a push element for pushing the compression sleeve off the carrier while the blood vessel is disposed in the bent-open compression sleeve so that, upon its release from the carrier, the compression sleeve extends tightly around the blood vessel.

Abstract: The present invention relates to a process for preparing (meth)acrylic acid, characterized in that a cyclic ester is converted to (meth)acrylic acid in the presence of a catalyst. The (meth)acrylic acid prepared can in particular be converted to (meth)acrylates.