Measuring the Electrical Properties of Malignant Tissues Ex Vivo

Neoplasms Clinical Trial

Official title:

Measuring the Electrical Properties of the Excised Malignant Tissues Obtained From Cancer Surgeries

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT02747212
• Other study ID #: SXXin-EPs-measurement-ex vivo
• Status: Not yet recruiting
• Start date: December 1, 2018
• Est. completion date: January 2020

Study information

• Verified date: October 2018
• Source: Southern Medical University, China
• Contact: Sherman X Xin, professor
• Phone: 008613602733465
• Email: xxg[@]smu.edu.cn
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

Previously published studies have indicated that there exist difference in electrical properties (EPs), i.e., the conductivity and relative permittivity, between malignant and adjacent normal tissue, which will be useful in the early detection of cancers. While the EP informations of cancer tissues are not sufficient enough. The purpose of this study is to measure the electrical properties of the excised malignant tissues obtained from cancer surgeries.

Description:

The measurements were conducted in the operating rooms of the hospital where the tissues were excised. Once the tissue was excised from the patient, the pathologist assisted the one of the engineers (already at the hospital) responsible to conduct the measurement. The specimen were designed to permit at least one measurement of malignant tissue and at least one measurement of normal tissue. Occasionally, the measurement of normal tissue was not possible if, for example, the normal tissue occupied a volume of small proportion for every excised specimen. The specimens for dielectric properties measurement were classified as normal or malignant by the pathologist based on his own expertise and decision criteria (visual inspection, anatomy) and the per-operative histological examination. The measurements were directly performed on the bulk specimen. The patient age, tissue temperature at the time of measurement and time between excision and measurement for each sample were recorded.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 200
• Est. completion date: January 2020
• Est. primary completion date: August 2019
• Accepts healthy volunteers: No
• Gender: All
• Age group: N/A and older

Eligibility

Inclusion Criteria:

• Clinical diagnosis of cancer Disease

Exclusion Criteria:

Related Conditions & MeSH terms

• Neoplasms

Intervention

Device:
• network analyzer
The dielectric properties of the tissues were measured using the open-ended coaxial line method. The measurement system consisted of a network analyzer (Model 4395A, Agilent Corp., Santa Clara, CA) associated with an S-parameter test set (Model 87511A, Agilent Corp., Santa Clara, CA). A semi-rigid coaxial line with a diameter of 3.58 mm was connected to the network analyzer system by using a Bayonet Neill-Concelman connector. The other tip of the coaxial line (probe) was placed on the flat bare surface of the tissue that placed on a measurements experiment platform.

Locations

Country	Name	City	State
China	Zhujiang Hospital	Guangzhou	Guangdong

Sponsors (2)

Lead Sponsor	Collaborator
Southern Medical University, China	Zhujiang Hospital

Country where clinical trial is conducted

China, 

References & Publications (5)

Athey T W, Stuchly M A and Stuchly S S. Measurement of radio frequency permittivity of biological tissues with an open-ended coaxial line: Part I. Microwave Theory and Techniques, IEEE Transactions on IEEE Trans 30(1): 82-86, 1982.

Bobowski Jake S, Johnson Thomas. Permittivity measurements of biological samples by an open-ended coaxial line. Progress In Electromagnetics Research B 40: 159-183, 2012.

Mehta P, Chand K, Narayanswamy D, Beetner D G, Zoughi R and Stoecker W V. Microwave reflectometry as a novel diagnostic tool for detection of skin cancers IEEE Trans. Instrum. Meas. 55: 1309-16, 2006

Smith SR, Foster KR, Wolf GL. Dielectric properties of VX-2 carcinoma versus normal liver tissue. IEEE Trans Biomed Eng. 1986 May;33(5):522-4. — View Citation

Surowiec AJ, Stuchly SS, Barr JB, Swarup A. Dielectric properties of breast carcinoma and the surrounding tissues. IEEE Trans Biomed Eng. 1988 Apr;35(4):257-63. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Conductivity of Malignant Tissues Measured Ex Vivo		one year
Primary	Relative Permittivity of Malignant Tissues Measured Ex Vivo		one year

External Links

•   An Internet resource for the calculation of the dielectric properties of body tissues in the frequency range 10 Hz - 100 GHz Based on data published by C.Gabriel et al. in 1996.