Abstract: A device for carrying out a test for the detection of particles in urine, especially for carrying out a test to determine the susceptibility of a test subject for kidney stones, whereby urine from the test subject is taken and collected and then the detection test is carried out, whereby the urine after a stand time is poured out of the test vessel, whereby the residue of test particles may be present in the test vessel is detected subsequently by the addition of a detection reagent, especially a dye reagent for optical detection, especially for a self test by a test subject, for example, at home. The device having a collecting vessel in which the urine is directly collected from the test subject and which also simultaneously forms the test vessel. The test vessel is column shaped and tapered toward its bottom and upwardly transitions into an overflow region.

Abstract: A device for carrying out a test for the detection of particles in urine, especially for carrying out a test to determine the susceptibility of a test subject for kidney stones, whereby urine from the test subject is taken and collected and then the detection test is carried out, whereby the urine after a stand time is poured out of the test vessel, whereby the residue of test particles may be present in the test vessel is detected subsequently by the addition of a detection reagent, especially a dye reagent for optical detection, especially for a self test by a test subject, for example, at home. The device having a collecting vessel in which the urine is directly collected from the test subject and which also simultaneously forms the test vessel. The test vessel is column shaped and tapered toward its bottom and upwardly transitions into an overflow region.

Abstract: In accordance with the invention, a method for executing reactions at temperatures exceeding 50.degree. C. is disclosed using minimal quantities of fluid samples. The method uses a reaction vessel which minimizes the containment space for the fluid sample. The reaction vessel includes a sample-receiving tube and an insert. The insert engages the sample-receiving tube, forming a seal and prevents evaporation of the fluid sample during heating. The sample-receiving tube of the method is tapered to be narrow towards the bottom so that the insert can be easily inserted into the sample-receiving tube from the top and provide a tight seal in the lower extremity without increasing pressure in the reaction chamber. Equalization between the two sides of the sealing insert can occur as the insert is being introduced. Minimal displacement of the insert in the axial direction of the sample-receiving tube produces a sealing connection minimizing undesirable pressure build up.