NIM vs Neurosign in nerve sparing total thyroidectomy. Multicentric experience.

INTRODUCTION: Injury to cranial nerve represents 5% of negligence litigation against general surgeons and of all malpractice jury verdicts in endocrine surgery 60% accounts for recurrent nerve injuries and 15% for anoxic brain injuries from RLN injuries, unrecognized post-operatively. During Total Thyroidectomy is reported an incidence of failure to find the nerve in 5- 18% of cases and if we think that routine identification of the RLN during thyroid surgery has reduced the injury rate from 10% to less than 4% and that the incidence of nerve paralysis was 3 to 4 times greater in cases where the nerve was not exposed than in cases where was routinely exposed, then we understand the importance of a clear identification during every thyroid dissection MATERIALS AND METHODS: 880 Total Thyroidectomies during the last 4 years, since Jannuary 2007 until December 2010, (610 F, 270 M; mean age 44,5 years old, range 14-83). All patients were examined pre and postoperatively (1-6 months after) by direct laryngoscopy or laryngofibroscopy to check vocal cord mobility (medium follow up 25.5 months range 3-50 months). The Authors reviewed charts from two randomized groups, selected by a double blind, statistically designed study and again compared in a multivariate analysis (Stat 2004 ltd): 1) 480 total sutureless thyroidectomies, performed during the previous year with continuous intra-operative nerve monitoring using dedicated endotracheal tube with a last generation Nerve Integrity Monitor Pulse II (N.I.M. pulse II®) 2) 400 total sutureless thyroidectomies: performed with continuous intra-operative nerve monitoring using dedicated Laryngeal Electrode, a self-adhesive device designed to fit onto standard reinforced endotracheal tubes (Neurosign® 1040 - 4 Channel EMG) RESULTS: There were no statistically significative difference between the two groups for distribution of age, sex, epidemiological characteristics, type of pathology etc. The incidence of major complications in thyroid surgery in the first two groups (total Thyroidectomy performed by NIM and by Neurosign), as well as compared with the data of the literature are absolutely overimposable; only significative difference is a reduction of the costs in the second group (Neurosign). The 1st group (NIM) specificity is 90.2% (433/480). There were 6 cases of temporary RLN paralysis (temporary paralysis rate: 1.25 % of patients), 3 true positive and 3 false negative. Finally there were 3 cases of permanent RLN paralysis (0.75%), 2 truepositive and 1 false-negative developed after 10 days (demyelination by thermal injury). The 2nd group (Neurosign) specificity of 89 % (356/400). There were 6 cases of temporary RLN paralysis (rate: 1.5 %, p > 0.5), 2 true positive, 1 false positive and 4 false negative. Finally 2 cases of permanent RLN paralysis (0.5% p > 0.5), 2 true-positive. DISCUSSION AND CONCLUSION: Our data confirm a useful application of NIM and Neurosign in thyroid dissection nerve prevention. We don't believe that those procedures can be useful for learning thyroid gland surgery, because can't preserve from an accurate dissection and nerve identification technique, but can only support in nerve-at-risk thyroidectomy or during dissection can support expert surgeon's decision, having a clear pre-operative (post-anesthesiologist) and post-operative predictive value. Those procedures are anyway expensive and time consuming (25000-30000 € for the E.M.G. system and almost 200-250 € for each dedicated endotracheal tube in NIM group). So Neurosign group has over-imposable results in terms of complications specificity and accurancy (no statistically significative differences), but it's a much cheaper procedure!

Nerve sparing sutureless total thyroidectomy. Preliminary study.

AIM: In the present study the authors assess the advantages of new technologies in thyroid surgery: to prevent nerve injury by using an intra-operative continuous nerve-monitoring techniques and to compare the real advantages of advanced coagulation devices. MATERIALS AND METHODS: Among a series of 440 thyroidectomies (jan 2004-feb 2006) the Authors reviewed charts from two groups: (1) 240 total thyroidectomies performed using the traditional monopolar electrocautery, non-absorbable stitches for the principal vascular pedicles. (2) 140 total thyroidectomies performed using dedicated small bipolar electro thermal coagulator (ligasure-precise). (3) Since 2006 in a double blind group selection of 70, we've performed sutureless thyroidectomy with continuous intraoperative nerve monitoring using dedicated endotracheal tube. Mean operative time, post-operative bleeding, post-operative stay, incidence of transient or definitive laryngeal nerve lesions, incidence of permanent or transient hypocalcaemia, costs of the procedures were analyzed. RESULTS: Major complications in the first two groups compared with the data of the literature are absolutely over-imposable, except a reduction of incidence of transient hypocalcaemia in the Precise group, but if we compare data of the 3rd group (NIM), we find a significative reduction of transient and permanent laryngeal nerve palsy incidence. DISCUSSION AND CONCLUSION: This new technology offers several advantages: (1) atraumatic; (2) easy to use; (3) continuous monitoring and audio feedback to the surgeon (4) works outside the operation field (5) high sensitiveness. Cost-analysis confirm that NIM + ligasure have same or less cost and time and probably less complications than traditional Total Thyroidectomy.

Artificial intelligence against breast cancer (A.N.N.E.S-B.C.-Project).

INTRODUCTION: Our preliminary study examined the development of an advanced innovative technology with the objectives of--developing methodologies and algorithms for a Artificial Neural Network (ANN) system, improving mammography and ultra-sonography images interpretation;--creating autonomous software as a diagnostic tool for the physicians, allowing the possibility for the advanced application of databases using Artificial Intelligence (Expert System). MATERIALS AND METHODS: Since 2004 550 F patients over 40 yrs old were divided in two groups: 1) 310 pts underwent echo every 6 months and mammography every year by expert radiologists. 2) 240 pts had the same screening program and were also examined by our diagnosis software, developed with ANN-ES technology by the Engineering Aircraft Research Project team. The information was continually updated and returned to the Expert System, defining the principal rules of automatic diagnosis. RESULTS: In the second group we selected: Expert radiologist decision; ANN-ES decision; Expert radiologists with ANN-ES decision. The second group had significantly better diagnosis for cancer and better specificity for breast lesions risk as well as the highest percentage account when the radiologist's decision was helped by the ANN software. The ANN-ES group was able to select, by anamnestic, diagnostic and genetic means, 8 patients for prophylactic surgery, finding 4 cancers in a very early stage. DISCUSSION AND CONCLUSION: Although it is only a preliminary study, this innovative diagnostic tool seems to provide better positive and negative predictive value in cancer diagnosis as well as in breast risk lesion identification.

Thromboembolic tendency (TE) in IBD (Inflammatory bowel disease) patients.

BACKGROUND: The incidence of TE events in IBD patients is higher then in population control. The main reason of it, is the hypercoaugulable state. Our aim was to detect serum markers related to TE, that can assume preventing and prognostic meanings. MATERIALS AND METHODS: We performed a 3 years study on 71 patients with IBD, evaluating hypercoaugulability, and then we compared the results with a 71 patients non IBD group control. We also investigated patients of both groups concerning TE events occurred already. RESULTS: In IBD group we found out that 16 patients (22.5%) had history of TE versus >1% of group control. Nineteen of them, already had knowledge of their previous hypercoaugulating condition. 48 (67%) had increased markers value versus less then 6% detected in group control. In IBD group 43% ,20% and 4.2% had respectively 1, 1-3 or > 3 markers higher levels then normal range. Among the markers investigated, we detected increased levels of plated in 33%, homocysteine in 26.7%, d-dimero 25.3%, c3 in 15.4%, apcr in 5.6%. CONCLUSIONS: From our study we detected highest incidence of TE events, and hypercoaugulating status in IBD group. In our previous investigations, plated, homocysteine, d-dimero, c3, and apcr, seems to be the TE markers with higher sensibility. It seems reasonable, according our experience, to propose a new TE risk score index for IBD patients: low, mild and high risk respectively for patients with 1, 1-3 and >3 markers with higher serum levels then normal range. KEYWORDS: Inflammatory bowel disease, Thromboembolism risk score.

Verification of the effectiveness of silver dressings to prevent reinfection of skin ulcers after debridement.

OBJECTIVE: To test the usefulness of silver dressings in patients with skin ulcers in the healing phase after debridement. MATERIALS AND METHODS: After randomly selected a group of 30 patients and divided them into three groups (A, B and C) according to the type and severity of the ulcer, we used respectively for each group antiseptics-free dressings, hydrofiber dressings with a low or a high content of silver. Then we performed samples by aspiration from the bottom of the wound three times (zero time, after two weeks, after a month) to prepare bacterial cultures. RESULTS: In group A, 5 ulcers showed signs of critical colonization after two weeks and 2 of these showed evidence of infection without progression to healing after a month. In groups B and C, no ulcer showed signs of infection with negative cultures. In these two groups, wounds evolved towards healing. CONCLUSIONS: Silver dressings seem to be the best option for the prevention of reinfection of skin ulcers; silver concentration should vary according to the degree of ulcer contamination. Dressings with hydrofibers avoid the accumulation of secretions for bacterial growth which would compromise tissue repair.

Abdominal hypertension and venous insufficiency of lower limbs: is there a relationship?

OBJECTIVE: The purpose of our study is to understand the compression, by subcutaneous fat in obese patients, who present a chronic increase in abdominal pressure, and on the sapheno-femoral cross. Such increase would result in a chronic venous insufficiency (CVI) of lower limbs and, if possible, it will be quantified also according to the posture. MATERIAL AND METHODS: We studied two different groups of patients with CVI: obese and non-obese. The severity of CVI was classified with the CEAP classification or by the standards of recent classifications. Abdominal pressure, by means of Kron's method, and anterior-sagittal diameter were measured in some of the non-obese patients (4 males and 4 females) and in all the obese patients. The diameter of the femoral vein of both groups of patients in supine, sitting and standing positions was also measured. RESULTS: We found a higher incidence of CEAP 5-6 classes in the obese group than in the non-obese one; we also saw a higher incidence of classes 1-2 in the non-obese group than in the obese one. Moreover, Kron's method showed a significant difference in abdominal pressure in relation to the BMI and the increase in the femoral vein diameter appears to be related to the weight and to the position. DISCUSSION: It was clear that the clinical manifestations of CVI are more severe in obese than in non-obese patients. Obesity in our study clearly acts with a continuous compressive action on the veins of the abdomen and thereby on the femoral vein, further contributing to a retrograde flow. So we tried to quantify an entity that until now could only be assumed.