Clinical Impact of Parathyroid Autofluorescence Visualization During Thyroid Surgery
Study Details
Study Description
Brief Summary
This Before-and-after Controlled Study study evaluates the clinical impact of parathyroid autofluorescence visualization using near infrared light (NIR) during total thyroidectomy (TT).
It compares two groups of consecutive patients who underwent TT associated or not to lymph node dissection (LND) with and without intraoperative use of NIR, by the same surgeon.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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Detailed Description
Total thyroidectomy (TT) is responsible for postoperative hypocalcemia in 20-30% of patients, which is definitive in 1-4% of operated patients (1).
This complication is mainly due to surgery-induced parathyroid dysfunction, which could be improved by a better intraoperative identification of the parathyroids.
Intraoperative parathyroid auto-fluorescence visualization (without any dye injection) using near infrared light (NIR) is an emerging technique, which allows correct identification of normal parathyroids in almost all cases (2), but the clinical impact of NIR is unknown.
The main objective of this study is to assess the impact of intraoperative use of NIR camera on postoperative hypocalcemia. Secondary objectives are to assess the impact of NIR on the visualization, autotransplantation and inadvertent resection rates during TT.
The investigators compare 2 groups of patients operated by one surgeon during 2 consecutive but distinct periods (before and after the use of NIR) with control groups operated by another surgeon during the same periods. This study is observational since there was no predefined protocol nor sample size calculation of study groups prior to data collection.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| NIR- All consecutive patients (n=174) who underwent conventional total thyroidectomy (TT)+/- lymph node dissection (LND) without the use of NIR - parathyroid identification was done by naked eye only- by surgeon 1, from January 2015 to January 2016 (period 1) |
|
| NIR All consecutive patients (n=63) who underwent conventional total thyroidectomy (TT)+/- lymph node dissection (LND) with intraoperative use of NIR - surgical field was examined with NIR before any thyroid dissection- by surgeon 1, from February 2016 to May 2016 (period 2) |
Device: Near infrared camera (NIR)
Surgical field was examined with NIR, during a few minutes (<5') with room lights switched off, to avoid parasite lights, then conventional open thyroidectomy was resumed conventionally. Real-time images, evocative of autofluorescent parathyroids, were checked visually.
NIR consisted of a 750 nm class 1 laser excitation, with a power <20mW/cm2 (5 times less than the limit of 100mw/cm2, fixed by the international norm IEC 60601-2-41). It was provided by the Fluobeam® camera, which was inserted into a sterile cover and hold at a 15-20 cm distance from the patient. The system has an FDA 510(k) authorization for clinical use in parathyroid surgery and a European Community certification (Class 1 device).
Other Names:
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| Control1 Patients (n=30) patients randomly selected among the patients who underwent TT+/- LND without the use of NIR, by another surgeon in the unit (surgeon 2), during period 1. |
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| Control2 Patients (n=30) patients randomly selected among the patients who underwent TT+/- LND without the use of NIR, by surgeon 2, during period 2. |
Outcome Measures
Primary Outcome Measures
- Postoperative hypocalcemia [6 months]
Postoperative day 1 and day 2 corrected calcemia(hypocalcemia when calcemia <2mmol/l). If hypocalcemia, calcium is measured at 1 month and 6 months
Secondary Outcome Measures
- number of identified parathyroids [immediate (intraoperative)]
- number of autotransplantated parathyroids [immediate (intraoperative)]
when parathyroids are impossible to preserve in situ, they are fragmented and inserted in the sternocleidomastoid muscle
- number of inadvertently resected parathyroids [within 15 days after surgery (time to complete pathology examination)]
When parathyroids are found on the thyroid specimen during pathology examination, they are called 'inadvertently resected'
Other Outcome Measures
- number of parathyroids identified by NIR before naked eye [immediate (intraoperative)]
in NIR group only
Eligibility Criteria
Criteria
Inclusion Criteria:
- All patients who underwent one-stage total thyroidectomy, associated or not to lymph node dissection (TT +/- LND)
Exclusion Criteria:
- Combined parathyroid and thyroid disease (including patients with enlarged parathyroids incidentally found during surgery and resected)
Contacts and Locations
Locations
No locations specified.Sponsors and Collaborators
- Hôpital Européen Marseille
- Assistance Publique Hopitaux De Marseille
Investigators
- Principal Investigator: Fares BENMILOUD, MD, Hopital Europeen Marseille
Study Documents (Full-Text)
None provided.More Information
Publications
- Duclos A, Peix JL, Colin C, Kraimps JL, Menegaux F, Pattou F, Sebag F, Touzet S, Bourdy S, Voirin N, Lifante JC; CATHY Study Group. Influence of experience on performance of individual surgeons in thyroid surgery: prospective cross sectional multicentre study. BMJ. 2012 Jan 10;344:d8041. doi: 10.1136/bmj.d8041.
- McWade MA, Sanders ME, Broome JT, Solórzano CC, Mahadevan-Jansen A. Establishing the clinical utility of autofluorescence spectroscopy for parathyroid detection. Surgery. 2016 Jan;159(1):193-202. doi: 10.1016/j.surg.2015.06.047. Epub 2015 Oct 9.
- ParaFluo1