MedTrace Logo

Intra-operative Infra-red Fluorescent Imaging in Thyroid and Parathyroid Surgery

NCT02089542 · Status: COMPLETED · Phase: PHASE1/PHASE2 · Type: INTERVENTIONAL · Enrollment: 41

Last updated 2016-11-02

No results posted yet for this study

Summary

Reliable identification of parathyroid glands is critical to the success of thyroid and parathyroid surgery. In thyroid surgery, inadvertent injury to parathyroid glands may cause temporary or permanent hypoparathyroidism (low calcium levels needing long term treatment). In parathyroid surgery, early identification of normal and/or enlarged parathyroid glands helps in deciding on the extent of surgery and increases the chances of postoperative normal calcium levels.

Methylene Blue (Methylthioninium chloride, MB) is a dye that when given intravenously in high doses, is taken up differently by thyroid and parathyroid tissue. It is currently used during parathyroid surgery by some surgeons to help identify enlarged parathyroid glands by visual examination alone. Such visual examination is unhelpful in the identification of 'normal' parathyroid tissue. MB exhibits fluorescent properties in the near-infrared range (light just beyond the visible spectrum). This can be picked up by an appropriate imaging system. This has potential to identify and differentiate between 'normal' parathyroid, 'abnormal' parathyroid and thyroid tissue during surgery.

The investigators have established the feasibility of the intra-operative use of a near infra-red fluorescent imaging device called Fluobeam® and demonstrated the ability of this device to pick up near infra-red fluorescence from human tissue after administration of intravenous MB. Animal experiments have shown that doses as low as 0.1mg/kg of MB given intravenously enable fluorescent visualisation of thyroid and parathyroid glands.

This study will aim to optimise the dose and timing of administration of MB in human thyroid and parathyroid surgery and to develop a protocol which would then subsequently be assessed for effectiveness in a multi-centred randomized controlled setting.

Conditions

  • Total Thyroidectomy
  • Bilateral Neck Exploration for Primary Hyperparathyroidism

Interventions

OTHER

MB and fluorescent imaging

Single arm study for the development of a protocol stipulating the optimum dose and time to peak near infra-red fluorescence from intraoperative injection of low dose Methylthioninium chloride

Sponsors & Collaborators

  • Sheffield Teaching Hospitals NHS Foundation Trust

    lead OTHER

Principal Investigators

  • Saba Balasubramanian, MS FRCS PhD · University of Sheffield

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2014-10-31
Primary Completion
2016-06-30
Completion
2016-10-31

Countries

  • United Kingdom

Study Locations

More Related Trials

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT02089542 on ClinicalTrials.gov