Symptoms and General Pathology

Wounds and Injuries

All Conditions

Neoplasms

Urinary Tract, Sexual Organs, and Pregnancy Conditions

Rare Diseases

Hyperthermia

Uterine Cervical Dysplasia

Precancerous Conditions

Uterine Cervical Diseases

Uterine Diseases

Genital Diseases, Female

Genital Diseases

Urogenital Diseases

Female Urogenital Diseases

Pregnancy Complications

Female Urogenital Diseases and Pregnancy Complications

Cervical Intraepithelial Neoplasia

The intervention administered in this arm is the straight wire excision of the transformation zone, a electrosurgical method to perform a cone biopsy using a 1 cm straight wire of 0.20 mm wire. The activated wire is used in much the same way as a cold knife or laser beam fashioning the surgical specimen to achieve two centimeters cm at cervical canal..

The intervention administered in this arm is the large loop excision of transformation zone as a cone biopsy, performed using a large loop electrode of 2 cm depth, applied to the cervix to achieving two centimeters at cervical canal .

Straight wire excision of transformation zone is a electrosurgical conization method,which uses a straight wire electrode as a knife to remove the dysplastic epithelium of the cervix.

Straight Wire Excision of Transformation Zone

LLETZ cone is a electrosurgical conization method, which is performed with a large loop electrode of 20-25 mm depth. The loop is applied to the cervix outside the lateral margin of TZ and brought slowly to the controlateral TZ margin.

Large Loop Excision of Transformation Zone (cone biopsy)

WALTER PRENDIVILLE, PhD

The purpose of this trial is to determine whether SWETZ (Straight Wire Excision of Transformation Zone) is a superior alternative to LLETZ cone (Large Loop Excision of Transformation Zone cone biopsy) in the management of pre-invasive endocervical disease.

SWETZ is a new cone biopsy procedure performed with a straight wire electrode and it will be compared to LLETZ cone, which is performed with a large loop electrode.

The treatment of precancerous lesions hinges on the destruction, or more commonly, the excision of the cervical transformation zone . When the transformation zone contains squamous precancer and is completely ectocervical and therefore full visible, excision or destruction is an effective and relatively straightforward therapeutic entity. However in a small proportion of women a cone biopsy is necessary. A cone biopsy often requires the excision of 20-30 mms of endocervical canal.

Interventions.

1. The standard procedure, LLETZ - cone (Large Loop Excision of Transformation Zone cone biopsy), is performed with a large loop electrode of 20-25 mm depth. The activated loop was applied to the cervix outside the lateral margin of transformation zone and brought slowly to the controlateral margin with the objective to acquire 20-25 mm up the canal.
2. The experimental intervention is SWETZ (Straight Wire Excision of Transformation Zone), a method of excision using a 1cm straight disposal of 0.20 wire to remove the endocervical transformation zone or glandular disease. The activated wire was used as a knife, fashioning a cone with desired dimensions.

This technique may be able to excise the endocervical transformation zone with a lower rate of morbidity and incomplete excision rate than LLETZ cone biopsy.

The hypothesis to be tested in this trial is that SWETZ is superior to LLETZ cone in the management of endocervical pre-invasive disease.

Efficacy Study of Diathermy Cone Biopsy for the Treatment of Cervical Intraepithelial Lesion

A Study of Two Cone Biopsy Techniques For Women With Cervical Pre-Invasive Disease. LLETZ Cone and SWETZ.

Primary outcome is the number of participants with incomplete excision of dysplasia at the endocervical excision margin as recognized histologically.

Time was recorded from insertion until removal of the vaginal speculum.

Oswaldo Cruz Foundation

The experimental intervention was SWETZ, which uses a 1cm straight wire electrode to perform a cone. The activated electrode is applied for shaping a cone with the ambition of removing 20-25 mm length of endocervical epithelium.

SWETZ - Straight Wire Excision of the Transformation Zone

The standard procedure, LLETZ - cone, was performed with a large loop electrode of 20-25 mm depth. The activated loop is applied to the cervix outside the lateral margin of TZ and brought slowly to just outside the controlateral TZ margin with the ambition of removing 20-25 mm length of endocervical epithelium.

LLETZ Cone - Loop Excision of TZ Cone Biopsy

Total

Age, Continuous

Sex: Female, Male

Brazil

Ireland

Region of Enrollment

Investigator: MJCamargo [Camargo Maria José] Official Title: PHD

SWETZ (Straight wire excision of the transformation zone), the experimental intervention, is a cone biopsy procedure that uses a 1cm X 0.20mm straight wire to fashion a cone excision,with the ambition of removing 20-25 mm length of endocervical epithelium. Cone biopsy is a surgical procedure which objectives the excision of the pre-invasive disease located at endocervical transformation zone or glandular epithelium of the cervix. This procedure removes the cervical pre-invasive disease for the woman under this condition.

SWETZ

LLETZ cone,the standard procedure is performed with a large loop electrode of 20-25 mm depth. The activated loop is applied to the cervix outside the lateral margin of TZ and brought slowly to just outside the controlateral TZ margin with the ambition of removing 20-25 mm length of endocervical epithelium.Cone biopsy is a surgical procedure which objectives the excision of the pre-invasive disease located at endocervical transformation zone or glandular epithelium of the cervix. This procedure removes the cervical pre-invasive disease for the woman under this condition.

LLETZ Cone

All data were analysed bu intention to treat.

Endocervical Margin Not Free of Disease.

LLETZ - cone was performed with a large loop electrode of 20-25 mm depth. The activated loop is applied to the cervix outside the lateral margin of TZ and brought slowly to just outside the controlateral TZ margin with the ambition of removing 20-25 mm length of endocervical epithelium.

LLETZ - Cone

SWETZ uses a 1cm straight 0.20mm wire to fashion a similar excision.

Time Spent to Perform the Procedure

The experimental intervention was SWETZ (straight wire excision of the transformation zone), which uses a 1cm straight wire electrode to perform a cone. The activated electrode is applied for shaping a cone with the ambition of removing 20-25 mm length of endocervical epithelium.

The standard procedure, LLETZ - cone (large loop excision of tranformation zone used as cone biopsy), was performed with a large loop electrode of 20-25 mm depth. The activated loop is applied to the cervix outside the lateral margin of TZ (transformation zone) and brought slowly to just outside the controlateral transformation zone margin with the ambition of removing 20-25 mm length of endocervical epithelium.

Spots Global Cancer Trial Database for large loop excision of transformation zone