processing static observation leica geo office

There is however a patient to whom an explanation has to be provided.Īlthough mechanical or electrical faults occasionally occur in tissue processors, processing mishaps where tissues are actually compromised, mainly occur because of human error.

This can be disastrous if you are dealing with diagnostic human tissue where the whole of the specimen has been processed (“all in”). It is worthwhile to stress that use of an inappropriate processing schedule or the making of a fundamental mistake (perhaps in replenishing or sequencing of processing reagents) can result in the production of tissue specimens that cannot be sectioned and therefore will not provide any useful microscopic information. Most laboratory supervisors would emphasise to their staff the importance of tissue processing. Most modern fluid-transfer processors employ raised temperatures, effective fluid circulation and incorporate vacuum/pressure cycles to enhance processing and reduce processing times. There are two main types of processors: the tissue-transfer (or “dip and dunk”) machines where specimens are transferred from container to container to be processed, and the fluid-transfer (or “enclosed”) types where specimens are held in a single process chamber or retort and fluids are pumped in and out as required. These devices have been available since the 1940’s 1 and have slowly evolved to be safer in use, handle larger specimen numbers, process more quickly, and to produce better quality outcomes. Tissue processing can be performed manually (hand processing), but where multiple specimens must be dealt with, it is more convenient and much more efficient to use an automated tissue processing machine (a “tissue processor”). “ Tissue processing” describes the steps required to take an animal or human tissue from fixation to the state where it is completely infiltrated with a suitable histological wax and can be embedded ready for section cutting on the microtome.

Processing static observation leica geo office