The most frequent causes of false negative smears are:
From the clinical specialist's viewpoint: Insufficient cervical sampling (approx. 30% insufficient smears with the cotton swab).
From the cytologist's viewpoint: Negative result (Pap 1 or 2) of a positive case owing to inadequate smear.
From
the biological side:
a)
ENDOCERVICAL ABNORMALITIES: The
squamo-columnar junction, which plays such a seminal role in the genesis of
cervical carcinoma, is often relocated in the canal. Therefore fifteen to
twenty per cent of intraepithelial lesions are found in the endocervix.
Neither the colposcope, nor the traditional methods of cytologic sampling,
ensure their early and accurate detection.
b)
SUPERFICIAL EPITHELIAL CHANGES WHICH
HINDER REPRESENTATIVE SAMPLING:
Traditional cytologic sampling results in smears composed of cells which
have exfoliated from the most superficial layer of the epithelium. In some
cases of high grade squamous intraepithelial lesion and invasive carcinoma
special stains (Krutsay) reveal superficial keratinisation which on occasion
may form thick hyperkeratotic plaques. These not only prevent the
spontaneous exfoliation of underlying neoplastic cells, but also form
impermeable barriers for the cotton-tipped applicator, so that procuring of
neoplastic cells becomes impossible. The metabolic exchange and blood supply
of the superficial portion of invasive carcinomas are precarious. This
results in extensive cellular degeneration and necrosis. The covering
necrotic blanket makes the deeper lying neoplastic cells unavailable for
examination. Hence the relatively frequent false negative smears in cases of
invasive carcinoma (20-25%).
Print or download the sample taking technique using the SZALAY CYTO-Spatula (PDF file) (short form)
Smear taking technique presentation (detailed)
A conventional Pap test (Papanicolaou) made with the SZALAY CYTO-SPATULA provides most reliable results, because with correct application always sufficiently well preserved and representative cell material is obtained. Medical opinion is that the SZALAY-CYTO-SPATULA improves the quality of smears and significantly reduces the number of false negative smears. |
1 |
Label the slide on the ground-glass side using a pencil (sequence number or name of patient). |
||
2 |
After insertion of the speculum the surface of the ectocervix is cleansed with a cotton swab and any mucus and debris removed. |
||
3 |
The Spatula with the optimal shape and size is chosen from the series. |
||
4 | The 'tongue' of the spatula is introduced into the canal, whilst its 'shoulder' is positioned on the 3 o'clock position of the ectocervix at the beginning of the procedure. | ||
5 |
With gentle pressure the spatula is rotated in a clockwise direction (see VideoClip). If the cervical canal is wide the spatula is allowed to wander according to the contour of the cervix during rotation. If after rotation through 360° without bleeding (see important information) it is felt that sampling is inadequate, the procedure may be repeated one or two times. |
||
6 |
The cells are spread on the slide always along its long axis, parallel to its edges. If the distribution of the cellular material is uneven, the same spatula may be used for respreading. |
||
7 |
The slide is immediately fixed. A distance of about 30 cm should be kept to prevent the cell sample from being blown away. |
||
8 |
Once the slide has been fixed, place the slide inside the envelope for dispatch. |
||
9 |
The optimal date for taking a smear is in the middle of the menstrual
cycle. An unfavourable date for taking a smear may result in unnecessary
bleedings. |
||
10 |
The Szalay Cyto-Spatulas are discarded after use. They may be burned as they leave no residue. |
Endocervical lesions: Abnormal cells taking up a position on the upper portion of the slide are assumed to derive from the tongue of the spatula.
Ectocervical lesions: Abnormal cells which are found on the lower third of the smear represent those obtained by the shoulder of the spatula.
Ecto-endocervical lesions: Even distribution of abnormal cells throughout the slide reflects simultaneous ecto- and endocervical disease.
A smear taken with the SZALAY CYTO-SPATULA provides highly reliable results for both conventional (Papanicolaou) and the newer very expensive but not really better liquid-based (Cell Suspension Based Cytologic) methods of analysis. A conventional Pap test (Papanicolaou) made with the SZALAY CYTO-SPATULA provides most reliable results, because with correct application always sufficiently well preserved and representative cell material is obtained. Medical opinion is that the SZALAY-CYTO-SPATULA improves the quality of smears and significantly reduces the number of false negative smears. |
If
the smear is to be further processed with liquid based (Cell Suspension Based
Cytologic) methods of analysis, the head of the SZALAY CYTO-SPATULA Plus is
removed after cervical sampling (item 5 above) by breaking it off at the visible
score line, and sealed in a designated container with the special solution for
further processing.
Print or download the range of shape and size of spatula (PDF file)
Real size of the Szalay Cyto-Spatula is: Device-lenght=220mm; Device-width: 5mm |
Szalay Cyto-Spatula No. 1
(for a small through medium sized portio)
Szalay Cyto-Spatula No. 2
(for a medium to large sized portio)
Szalay Cyto-Spatula No. 3
(for a very large portio)
Szalay Cyto-Spatula No. 4
a) for a larger cervix with an extended transformation zone, in addition to a cervical smear with a No. 1, No. 2 or No. 3 spatula or in combination with a Cytobrush.
b) for a smear from the outer surface only, in patients with an obliterated cervical canal or one that is too narrow for the passage of a No. 1 spatula. The cytology laboratory must be informed if this is the case.
The images above are bigger than the actual size of the Szalay-Cyto-Spatula
The smear taking technique is documented in the following small video clip. It can be obtained by download directly or can be ordered on a CD by email to CSM Graf GmbH.
Requirements: |
Video Clip
on
smear technique (Windows Media File, ca. 12. MBytes, Version: June 2008) |
In approximately 2-3% of cases, slight bleeding may occur when taking the cervical sample. This does not affect the colposcopic examination. Slight spotting may occur in that case for one to two days. This should cause no problem if the patient is informed of this possibility. Only very rarely does the blood affect the cytologic assessment. The colposcopic examination may also be conducted prior to taking the cervical sample.
breast test, cancer, pap, health, obgyn, pap smear, pap test, women's health, women's healthcare, women's cancers, annual exam, pelvic exam, gynecology exam, cervical cancer, gynecology, gynecologist, gynecological, cytology, oncology, papanicolaou, cervical screening, health insurance, HPV, human papilloma virus, cervical smear, STDs, sexually transmitted diseases ayre csm graf liquid based szalay cyto spatula obwegeser plus acta cytologica spatula zytologie gynäkologie abstrich abstrichentnahme abstrichqualität abstrichtechnik beschwerden brush carcinoma carcinoma in situ cervikal cervix cervix uteri cervixkrebs collumcarcinom curettage cyto spatula cytobrush cytospatel cytospatula detritus dysplasie ectocervix ektopie dünnfilm technik ektozervikale veränderungen ektozervix endocervix endometrium endozervikal endozervikale veränderungen endozervix endozervixzellen entnahmetechnik epithel epitheltyp exfoliation falsch-negativ frauen frauenarzt frauenbeschwerden granulozyten gynäkologie gynaecology gynecology gynaekozytologie hiv hpv intraepithelialen intrazervikal invasiv kolposkop kolposkopie konisation krebs krebsrate krebsvorsorge krebszellen kunststoffspatel labraskopie laparatomie läsion malignität menses metaplasiezellen muttermund nekrose neoplasie neurotisch oestrogen oestrogenapplikation paranekrose plattenepithel plastikspatel plattenepithelkarzinom plattenepithelzellen portio portiokarzinom proliferationsphase qualität routineabstrich schleim screening situ speculum spekulum sterblichkeit strichcurettage szalay spatel szalay cyto spatula transformationszone unterleib unterleibskrebs uteri vorsorgeuntersuchung zelldiagnostik zellen zervikalkanal zervix zervix uteri zervixkarzinom zervixkrebs zervixschleim zervixzytologie zylinderepithel zytodiagnostik zytodiagnostik zytologe zytologie zytotechnik csm graf ayre bethesda biopsy cervexbrush cancer carcinoma carcinoma in situ cell cell diagnosis cervical carcinoma cervix uteri colposcopy cyto cyto spatula cytologic samples cytologic sampling cytology cytology of the uterine diagnosis ectocervix endocervical abnormalities endocervix epithel false negative smear false-negative health instrument necrosis parakeratosis smear smear taking smear taking instrument smear taking technique smear taking tool pap smaera device smears spatula system take a smear tool transformation zone uterine uterine cytology carcinome cellule col utérin cytologie dépistage dysplasie éctocervix endocervix frotti frottis frotis cytologiques gynécologie gynécologue hiv hpv utérin dépistage cytologique espátula plástico www.yahoo.com www.altavista.com www.dogpile.com