The International Agency for Research on Cancer (IARC) has classified formaldehyde as a class 1 carcinogen. This classification is encouraging health authorities, surgical staff, pathologists and histotechnicians to look for ways to eliminate the substance from work environments. Critical exposure points for facility personnel are the operating suites and during the transfer of formalin-fixed tissues to the pathology lab.
Elimination or control of formalin exposure/volume from the surgery room to the lab.
TissueSAFE plus *
TissueSAFE plus is an innovative, patented vacuum system, which ELIMINATES formalin in the operating theatre and allows a controlled formalin-free transfer of biospecimens to the laboratory. Immediately after the excision, specimens are transferred to an adjacent room where the TissueSAFE plus is installed. Tissue is placed into sterilized vacuum-sealed specimen bags. "Fresh" specimens arrive and the fixation procedures can now take place under controlled conditions in the laboratory.
- No formalin fumes
- Specimens are held in “fresh” conditions
- No spilling
- Original specimen colors are preserved
- Drying of tissues is eliminated
* European Patent EP 2 070 410 B1, US Patent US 8,110,346B1Play video Download catalog Ask a question
HOW TO ELIMINATE FORMALIN IN SURGICAL SUITES
The SealSafe is the world’s first automatic system that fills dedicated bags containing the biospecimens, with the required fixative (i.e. formalin), in a standardized and documented way.
The innovative, patented SealSAFE technology allows operators in surgery rooms and in pathology laboratories to handle histology specimens in full safety.
Today’s manual operations to prepare, transport and stock histology specimens can be drastically improved with this disruptive technology.
- Standardization and quality
- Reduces the volume of formalin
- Full automation prevents exposure to formalin fumes
- Storage in vacuum-sealed bags dramatically reduces volume
- Extreme cost saving for disposal
** European Patent EP 2 524 595 B1 - US Patent US 8,865,092 B2Play video Download catalog Ask a question
BIOSPECIMEN MANAGEMENT: SAFETY AND AUTOMATION STANDARDS.
The traditional procedures of collection, transportation and archiving of pathology specimens are specific at each institution. The introduction of TissueSAFE plus and SealSAFE technology at the starting point of sample generation (the surgery room), pathology accessioning, and in the grossing area provides a dynamic and flexible solution with benefits to all the departments involved.
1 Surgery - 2 Transfer
In a dirty surgical room, the TissueSAFE or SealSAFE plus are used to vacuum seal biospecimens for transportation to the pathology laboratory. The operator can select the desired procedure for specimen management: fixative-free vacuum sealing or automated filling of the fixative plus vacuum sealing. Time and temperature conditions during transportation are monitored with a dedicated electronic data-logger, activated by the operator at the starting point. In case of vacuum sealing without the addition of the fixative, transportation and storage at +4°C are required. In this modality, optimal preservation of the molecular material of the specimen is guaranteed up to 72 hours.
3 - Pathology Lab
As specimens arrive into pathology and are processed through accessioning, relevant data can be downloaded and saved for future use. A detailed profile of transportation temperature conditions, duration of storage, and additional identification information is viewable and easily associated with patient cases.
4 - Pathology Lab
At the pathology laboratory, the specimen is received in a standardized fixative quantity or in “fresh” conditions. The sampling and grossing procedures are therefore carried out without necessary modifications of the current procedures.
5 - Pathology Lab
Installing a TissueSAFE plus or SealSAFE unit in the pathology laboratory enables maximum flexibility for specimen
management. Moreover, SealSAFE reusable vacuum storage bags allow multiple openings and sealing events, which can accommodate:
A. Status pre-examination of large case specimen fixation/hardening.
B. Receipt, grossing and final storage of medium-sized specimens.
C. Well fixed tissues can be sealed with minimal amounts of formalin or simply vacuum-sealed to achieve drastic cost and space savings.
Special vacuum-sealed bags
From operating room to final storage
- A - A double layered PA/PE, 135 microns in thickness guarantees greater mechanical flexibility and resistance to perforation. Available in five different dimensions, suitable for all kinds of specimen
- B - Three sealing areas and cutting lines marked for multiple reuse
- C - A sealable document pouch provides security for patient information
- D - The automatically printed adhesive label contains: ID, date, time, specimen and fixative weight
- E - Enlarged base for self-standing (only for SealSAFE)
Optimal morphological preservation for up to 72 hours
All specimen tissues
All tissue types have been preserved under vacuum packing (colon, gall bladder, spleen, kidney, thyroid, breast etc...) for up to 48-72 hours with optimal histological preservation.
Excellent H&E, HC, IHC, FISH staining properties
Over a thousand cases, using vacuum preservation, were tracked at the Molinette University Hospital in Turin, Italy. Morphological preservation and immunohistochemical reactivity were excellent and no adverse effects from the process were noted.
Adenocarcinoma of the colon.
The specimen was preserved under vacuum packing at 4°C for 48h, and then routinely processed with formalin fixation and paraffin embedding. The structure is preserved and the diagnosis is feasible. H&E x 150
Infiltrating ductal breast carcinoma.
The tissue specimen, removed on Friday afternoon, was preserved under vacuum packing at 4°C until Monday morning (64h), then routinely grossed, fixed and processed. The histological structure is well preserved. Staining for HER2 antigen (Herceptest TM by DAKO) shows a continuous membrane staining in >30% of cells (3+score).
Infiltrating ductal breast carcinoma.
The tissue specimen was preserved for 64h under vacuum packing, at 4°C. Dual-color FISH demonstrates an amplification of the HER 2 gene (red signal).
Molecular studies. Biobanking.
The quality of RNA preservation is of course related to the time of processing, but even tissues preserved under vacuum packing at 4°C for 48 hours provided nucleic acids of acceptable quality. This finding is in agreement with reports on the stability of RNA in non-fixed ice-preserved surgical specimens.
Colon mucosa either (A) frozen immediately after removal or (B) preserved under vacuum at 4°C for 48 h. (a) shows 1% denaturing agarose gel of total RNA running: the 18s band is visible and no degradation is appreciable. (b) represents RT-PCR products of cytokeratine 20mRNA of different BP number.
The upper band (arrow) is related to a 716-bp product.