Cognitive load in 3d and 2d minimally invasive colorectal surgery.

BACKGROUND: Three-dimensional (3d) laparoscopy has been introduced to enhance depth perception and facilitate surgical operations. The aim of this study was to compare cognitive load during 3d and 2d laparoscopic procedures. METHODS: Two subjective questionnaires (the Simulator Sickness Questionnaire and the NASA task load index) were used to prospectively collect data regarding cognitive load in surgeons performing 2d and 3d laparoscopic colorectal resections. Moreover, the perioperative results of 3d and 2d laparoscopic operations were analyzed. RESULTS: A total of 313 patients were included: 82 in the 2d group and 231 in the 3d group. The NASA TLX results did not reveal significantly major cognitive load differences in the 3d group compared with the 2d group; the SSQ results were better in the 3d group than in the 2d group in terms of general discomfort, whereas difficulty concentrating, difficulty focusing, and fatigue were more frequent in 3d operations than in 2d operations (p = 0.001-0.038). The results of age, sex, and ASA score were comparable between the two groups (p = 0.299-0.374). The median operative time showed no statistically significant difference between the 3d and 2d groups (median, IQR, 2d 150 min [120-180]-3d 160 min [130-190] p = 0.611). There was no statistically significant difference in the risk of severe complications between patients in the 3d group and in the 2d group (2d 7 [8.54%] vs 3d 21 [9.1%], p = 0.271). The median hospitalization time and the reoperation rate showed no difference between the 2d and 3d operations (p = 0.417-0.843). CONCLUSION: The NASA TLX did not reveal a significant difference in cognitive load between the 2d and 3d groups, whereas data reported by the SSQ showed a mild risk of cognitive load in the 3d group. Furthermore, 3d laparoscopic surgery revealed the same postoperative results as 2d standard laparoscopy.

Microwave ablation for large benign thyroid nodules: a proposal for a new approach: "the fluid-motion technique".

INTRODUCTION: Most thyroid nodules are benign, and treatment is primarily indicated for patients with symptoms or cosmetic concerns related to nodular volume. Recently, there has been growing interest in nonsurgical and minimally invasive techniques for the treatment of symptomatic benign thyroid nodules, including microwave ablation (MWA). AIMS: This study aims to evaluate the effectiveness, efficacy, and safety of ultrasound-guided uncooled MWA in the treatment of benign symptomatic thyroid nodules, using a new ablation technique called the "fluid-motion technique." MATERIALS AND METHODS: From April 2021 to February 2023, a total of 150 patients with benign thyroid nodules were treated using MWA at the Endocrine Surgery Unit of Pederzoli Hospital, Peschiera del Garda (Italy), with 102 of them being followed-up for at least 6 months. RESULTS: Before treatment, the mean major diameter was 38.4 ± 10.0 mm, and the mean volume was 13.6 ± 10.5 mL. At 1 month, the mean volume was 6.8 ± 6.2 mL, and at 3 months, it was 4.6 ± 4.1 mL. The mean Volume Reduction Rate (VRR) at 3 months was 61.1 ± 22.0%. Of the nodules, 17 (17%), 65 (66%), and 20 (19%) had volumes ≤ 10, 10.1-20, and ≥ 20.1 mL, respectively. For these nodules, the mean VRR at 3 and 6 months was 55.3 ± 16%, 63.4 ± 24.8%, 72 ± 26.9% and 68.0 ± 11.2%, 73.5 ± 18.3%, and 81.6 ± 15.8%, respectively. CONCLUSION: Our study shows that ultrasound-guided MWA is an effective and safe minimally invasive treatment for benign thyroid nodules. The goal is to achieve a VRR that can reduce symptoms and improve cosmetic appearance.

Behavioral aspects of Lutzomyia longipalpis (Diptera: Psychodidae) in urban area endemic for visceral leishmaniasis.

The study of some of the behavioral aspects of the main vector of Leishmania infantum chagasi Cunha & Chagas in the Americas, Lutzomyia longipalpis (Lutz & Neiva), such as dispersion, population size, and vector survival rates, is important for the elucidation of the mechanisms of visceral leishmaniasis transmission. These parameters were studied by means of capture-mark-release-recapture experiments in an urban area of Campo Grande municipality, an endemic area of visceral leishmaniasis, situated in Mato Grosso do Sul state, Brazil. Six capture-mark-release-recapture experiments were undertaken between November 2009 and November 2010 and once in January 2012 with a view to assessing the population size and survival rate of Lu. longipalpis. The insects were released in a peridomicile surrounded by 13 residences. The recaptures were undertaken with automatic light traps for four consecutive weeks after release in the surrounding area. In total, 3,354 sand flies were captured, marked, and released. The overall recapture rate during the capture-mark-release-recapture experiments was 4.23%, of which 92.45% were recaptured at the release site, indicating limited dispersal. The greatest distance recorded from the release site was 165 m for males and 241 m for females. The male daily survival rate, calculated on the basis of regressions from the numbers of marked recaptured insects during the 15 successive days after release was 0.897. The estimated male population size measured by the Lincoln Index was 10,947.127. Though Lu. longipalpis presented a limited dispersion the physical barriers typical of urban environments did not prevent the sand flies from flying long distances.

[Dermatologic diseases and healthcare pathway among pregnant women]. / Lésions dermatologiques et parcours de soins chez la femme enceinte.

OBJECTIVE: Make an inventory of skin lesions during pregnancy and obtain visibility on healthcare pathway among these women in order to identify more precisely the role of the general practitioner (GP). METHODS: Prospective, observational study, using a self-administered questionnaire among all women in immediate postpartum period between April 2021 and August 2021, relating to pre-existing skin lesions or rashes that appeared during pregnancy, and the description of the healthcare pathway among these women. RESULTS: The questionnaire was collected in 377 women with a mean age of 30.6±3.7 years, 88.6% had fair skin and 14.6% were smokers. Among them, 35 (9.3%) declared skin diseases prior to pregnancy, of which 22 had a history of atopic eczema. During pregnancy, 136 women (36.1%) declared having skin lesions, the most frequent of which were stretch marks (63.2%) and hyperpigmentation (26.5%), and mainly during the 2nd trimester (47.0%). Among these 136 women, only 59 (43.4%) referred it to a health care professional who was in 47.4% of cases (28/59) their GP and in 76.3% (45/59) of cases during a pregnancy follow-up appointment. CONCLUSION: This study showed that skin lesions during pregnancy were frequent and that the majority of these women consulted their GP.

Reduction of the emergency activity, during the Covid 19 Italian lockdown, what's the lesson to learn?

The COVID 19 pandemic was declared on the 9th of March 2020. The health crisis affected the whole world with a very high and unexpected number of infected people. The situation forced the declaration of lockdown and a worldwide health system reorganization. Surprisingly, the social distancing laws caused a reduction of urgent hospital activities not COVID 19 related. The aim of this manuscript is to analyze the reasons why fewer emergencies were described during the 2020 Italian lockdown. The Data reporting urgent Emergency Room (ER) activity, during the first three weeks of the Italian lockdown (Group 1), were analyzed and compared with the same period in 2019 (Group 2). During the study period in 2020, there was a 46,5% reduction in ER activity compared to that in 2019. Nevertheless, the hospitalization rate was higher in the 2020 then in 2019 (p<0.05). The present data showed that almost half of the basic ER activity araised from mild health problems that could be followed by territorial health services. The strengthening of territorial medical services would allow hospitals to handle critical situations more easily and to focus activity by reducing the waiting list.

Use of biological mesh in trans-anal treatment for recurrent recto-urethral fistula.

PURPOSE: To report the author's experience on a mini-invasive technique using bioprosthetic plug and a rectal wall flap advancement in the treatment of recurrent recto-urethral fistula. MATERIALS AND METHODS: Between 2013 and 2015, seven patients with recurrent recto-urethral fistula were referred to the Pederzoli Hospital, Peschiera del Garda, Verona, Italy. Intraoperatively all patients were found to have a rectal wall lesion and were treated with urinary and fecal diversion. For the persistence of the fistula, all the patients underwent a mini-invasive treatment consisting on placement of a bioprosthetic plug in the fistula covered by an endorectal advancement flap through a trans-anal and trans-urethral combined technique. RESULTS: Median operative time was 48 min with a median blood loss of 30 ml. Median hospital stay was 3 days (IQR 1-3). No case of fistula recurrence or plug migration was described. None of the patients experienced fecal or urinary incontinence. All patients obtained complete fistula healing. CONCLUSIONS: Recurrent recto-urethral fistula is a challenging postsurgical complication for surgeons and urologists, and its best treatment is still unknown. Our method seems to be feasible and effective for the treatment of complex recto-urethral fistula.

Nycthemeral Rhythm of Phlebotominae (Diptera: Psychodidae) in a Craggy Region, Transitioning Between the Wetland and the Plateau, Brazil.

Recording the nycthemeral rhythm of sand flies allows the evaluation of the daily activity in different ecotypes, the period of greatest activity, and their degree of anthropophily. We investigated the fauna and the rhythm of sand fly activity in an ecotourism region in Mato Grosso do Sul (MS) state, Brazil. Sand flies were captured monthly, using a Shannon trap for 24 h periods between July 2012 and June 2014. We collected 1,815 sand flies, in which Lutzomyia whitmani (=Nyssomyia whitmani, sensu Galati) and Lutzomyia longipalpis were the most abundant species during the dry season, with activity from 5 p.m.-7 a.m. and 6 p.m.-5 a.m., respectively. Both species require particular attention as vectors of Leishmania (Viannia) braziliensis and Leishmania (Leishmania) infantum in several regions of Brazil, including MS. However, Lutzomyia dispar was more anthropophilic, and was most active between January and March, from 5 p.m. to 5 a.m. Lutzomyia misionensis (=Pintomyia misionensis, sensu Galati) was present throughout both years, active from 4 p.m. to 5 a.m. Other species were active from 5 p.m. to 6 a.m. Due to intense tourism in the months that coincide with a high number of vectors for leishmaniases in Piraputanga, it is essential to determine vector-monitoring strategies in the area by investigating sand fly rhythm while not neglecting other periods of the year when the insects are present.

[Effect of probiotic administration on colic anastomosis healing]. / Influenza della somministrazione di probiotici nella guarigione delle anastomosi coliche.

Colic anastomoses are still affected by a high incidence of leakage. We speculate that a supply of fibres and probiotic bacteria improves the healing of colic anastomoses due to a higher production of short-chain fatty acids. These are known to improve the anastomotic healing of colic sutures. Sixty Lewis rats, weighing from 250 g to 350 g, were divided into 6 groups. Groups A + A1 were fed with a low-fibre diet (less than 0.1%), Groups B + B1 with normal rat chow and groups C + C1 with normal rat chow + Lactobacillus plantarum 299v. Transections and re-anastomosis of the distal colon were performed. Groups A1, B1 and C1 were sacrificed after 3 days, and groups A, B, and C after 7 days. The bursting pressure of colic anastomoses was measured. All data are expressed as mean (+/- S.D.). The pH of the colon contents was evaluated by means of a fine needle plastic electrode only in groups A1, B1 and C1. The results were studied by analysis of variance followed by the Student Newman Keuls test for multiple comparisons (significance level P < 0.05). Three days postoperatively, the pH of the colic lumen was lower in animals fed with a normal diet (pH 7.1 +/- 0.3 without Lp supplementation, 6.5 +/- 0.2 with Lp supplementation) than in animals fed with a low-fibre diet (pH 8.0 +/- 0.3). Bursting pressures were significantly higher in the groups fed with fibre and fibre + Lactobacilli than in animals on a low-fibre diet, both on day 3 and day 7. On the basis of these data there seems to be no support for the belief that a supply of fibre-rich food might impair healing and promote development of anastomotic leakage. On the contrary, short-chain fatty acids and fibres would seem to facilitate the healing of colic anastomoses.

Intraoperative and percutaneous radiofrequency thermal ablation in the treatment of hepatocellular carcinoma.

AIMS AND BACKGROUND: The aim of the study was to evaluate feasibility, survival rate, complications and length of hospital stay in 47 patients with hepatocellular carcinoma (HCC) treated by radiofrequency thermal ablation (RFTA). Though the treatment of choice for HCC is surgical resection, the strong association of this disease with cirrhosis often rules out this procedure. Many investigations have been conducted in order to identify alternative therapies. Preliminary studies of radiofrequency thermal ablation have shown that the technique is effective and safe, achieving a predictable area of tumor tissue coagulative necrosis and sparing the surrounding cirrhotic parenchyma, without any significant side effects. In addition, this technique, which can be performed percutaneously, allows very short hospital stays. PATIENTS AND METHODS: We report the results of a series of 47 cirrhotic patients with 52 HCC nodules (mean diameter 2.9 cm, range 1-6 cm) treated in our Institute between May 1997 and June 1999 by RFTA using an expandable needle with four hooks at its tip. All patients had hepatic cirrhosis (32 Child A, 13 Child B and two Child C). We treated patients with both unifocal (35 patients) and multifocal HCC (12 patients); 33 patients underwent percutaneous RFTA (54 passes), while in 14 cases RFTA was performed during laparotomy (22 passes). RESULTS: The mean number of passes to achieve complete necrosis was 1.43 in 28 patients with unifocal HCC treated by percutaneous RFTA, 1.7 in 7 patients with unifocal HCC treated by intraoperative RFTA, 2.8 in 5 patients with multifocal HCC treated by percutaneous RFTA and 1.43 in 7 patients with multifocal HCC treated by intraoperative RFTA. No deaths related to the procedure or major complications occurred. Post-treatment dynamic CT was performed in all patients. All patients but one were followed-up for a mean period of 11.8 months (1-25 months). Six patients died during the follow-up (three Child A, two Child B and one Child C. The actuarial survival, computed by the Kaplan-Meier method, was 83% at 24 months. The mean hospital stay was 3.4 days in patients treated by percutaneous RFTA and 11.2 days in those treated by intraoperative RFTA. CONCLUSIONS: In our opinion RFTA is an effective, safe technique capable of achieving good results in the conservative therapy of small HCC. We believe that curative ablation is possible for HCC nodules measuring up to 3 cm in diameter. Further studies of longer duration are necessary.

[The Bengmark tube in surgical practice and in the critically ill patient]. / Il sondino di Bengmark nella pratica chirurgica e nel paziente critico.

Enteral nutrition (EN) is increasingly used to minimize the rate of septic complications related to bacterial translocation, due to its effectiveness and low cost. Bengmark's self-propelling auto-positioning feeding tube (SPT) absorbs and uses gut motility for rapid transport to the upper small intestine, thereby allowing uninterrupted EN both in surgical and critically ill patients. We report on our experience with 175 SPTs applied over the period from December 1996 to February 2000, and analyse the safety, compliance, and indications of SPT in surgical and ICU practice. Open study: feasibility of insertion, time and rate of placement, compliance and complications related to the tube or to EN were studied. SPTs were successfully placed in 40 patients before liver resection, in 32 patients before extensive maxillo-facial surgery MFS and prior to colon resections in 10 cases. SPTs were also applied in 56 patients with acute vascular neurological diseases, 22 in pancreatic diseases and in another 15 critically ill patients. 92.5% of SPT's crossed the pylorus, while only 7.5% stopped in the stomach and 3.4% in the duodenum; 89.14% reached the first jejunal loop. The tip of the tube reached its final position within a mean period of 5.2 hours, 8% instantly and all within 24 hours. Enteral nutrition was started immediately after introduction of the tube into the stomach. The compliance was excellent, even in maxillo-facial surgery patients: only 2/76 patients (2.6%) showed poor compliance. There were no cases of aspiration pneumonia or other complications related to SPT. Polymeric nutrition was usually supplied at a starting flow rate of 45 ml/hour and rapidly increasing over the following 48 h. Eleven patients experienced diarrhoea and 6 abdominal distension, leading to a temporary reduction of the EN flow rate. Clogging of the SPT occurred in 13 patients: 7/13 were cleansed with pancreatic enzymes, but 6 had to be replaced. SPT is ideal for intensive EN and is characterised by minimal complications and excellent patient compliance.

The safety of radiofrequency thermal ablation in the treatment of liver malignancies.

INTRODUCTION: Radiofrequency ablation (RFA) has become widely accepted as an important adjunct, and sometimes a viable alternative, to liver surgery. The aims of this study are to assess the risks associated with percutaneous RFA and to discuss the indications and contraindications to its use. PATIENTS AND METHODS: This is a review of 130 consecutive patients who were treated for primary (n = 92) and metastatic (n = 38) liver tumours. Only complications after percutaneous RFA (83 patients) were evaluated. Interesting case studies are included to highlight potential complications following RFA and their management. RESULTS: One patient died of perforation of the colon and five others had major complications. There were 15 minor complications. Local recurrence rates reached 30% overall, and a further 25 patients developed a new hepatic lesion, different from the one treated by RFA. Median disease-free survival was 13 months. Overall survival rates at 1, 2 and 5 years were 85.3%, 71.3% and 57.6%, respectively. CONCLUSION: Percutaneous RFA is a safe and efficient technique but not free of complications and with potential fatal outcome. It is also associated with significant local recurrence rates. The procedure should only be performed following adequate training and the indication should always be discussed in multidisciplinary meetings. Patient's liver function and general health as well as tumour size and position must be considered. Intraoperative or video laparoscopic RFA is useful for superficial tumours in order to avoid damage to viscera surrounding the liver surface.

Surgical resection versus radiofrequency ablation in the treatment of small unifocal hepatocellular carcinoma.

BACKGROUND: Hepatocellular carcinoma (HCC) has a high worldwide prevalence and mortality. While surgical resection and transplantation offers curative potential, donor availability and patient liver status and comorbidities may disallow either. Interventional radiological techniques such as radiofrequency ablation (RFA) may offer acceptable overall and disease-free survival rates. MATERIALS AND METHODS: Sixty-eight cirrhotic patients matched for age, sex, tumor size, and Child-Pugh grade with small (1-5 cm) unifocal HCC were studied retrospectively to find determinants of overall and disease-free survival in those treated with surgical resection and RFA between 1991 and 2003. RESULTS: Multivariate analysis using Cox proportional regression modeling showed that overall survival was related to tumor recurrence (p = 0.010), tumor diameter (p = 0.002), and treatment modality (p = 0.014); overall p = 0.008. Recurrence was independently related to the use of RFA over surgery (p = 0.023) on multivariate analysis; overall p = 0.034. CONCLUSION: Surgical resection offers longer disease-free survival and potentially longer overall survival than RFA in patients with small unifocal HCC.

Treatment of recurrent hepatocellular carcinoma by radiofrequency thermal ablation.

BACKGROUND AND AIMS: The treatment of choice for hepatocellular carcinoma is surgical resection. Recurrence occurs in most patients. Aggressive treatment of liver recurrence increases patients' survival, but most frequently, these patients are not suitable for surgery. The aim of this study was to analyze the indications for and results of radiofrequency thermal ablation (RFTA) in the treatment of intrahepatic recurrences of hepatocellular carcinoma after surgical resection or after RFTA. PATIENTS AND METHODS: Seventy-nine patients with HCC were treated by RFTA (17 during laparotomy, 1 in video-laparoscopic surgery, and 61 percutaneously). Five (5/79) of these patients had recurrences after surgical resection and 1 patient had a recurrence (new lesion) after percutaneous RFTA. Fifteen of the 79 patients were treated for recurrence after transarterial chemoembolization (TACE) and, for the remaining 58 patients, RFTA was the first treatment. We used a radiofrequency generator with an expandable needle with four, seven, or nine hooks at its end. We followed up all patients with enhanced computed tomography (CT) scans and alpha-fetoprotein sampling 1 month after RFTA, and then every 4 months. RESULTS: All 5 patients treated for recurrence after resection are alive, after a mean period of 43 months from liver resection. One patient is disease-free, 1 patient has controlled disease, and 3 patients are in progression. The patient treated for recurrence after RFTA is disease-free after 4 months. CONCLUSIONS: We treated all our patients with intrahepatic recurrence after surgical resection by a multimodal approach. We regard RFTA as the treatment of first choice in the management of intrahepatic recurrence. For superficial tumors, surgical resection is still the best treatment. For multifocal recurrence, TACE is needed. RFTA can be useful as a complementary technique for lesions not completely treated by TACE.

Lactobacillus plantarum reduces infection of pancreatic necrosis in experimental acute pancreatitis.

BACKGROUND: Infection is the commonest cause of death in acute pancreatitis. Early reduction of commensal flora (particularly Lactobacillus species) and, at the same time, overgrowth of Enterobacteriaceae, especially Escherichia coli, have recently been described during acute pancreatitis. Lactobacillus plantarum has been shown to be effective in reducing the egress of endotoxin and microbial translocation in several experimental models such as chemically induced hepatitis and ulcerative colitis. AIM: The aim of the study was to determine whether L. plantarum 299v (Lp 299v) is capable of effectively reducing microbial translocation in experimental pancreatitis. METHODS: Acute pancreatitis was induced by isolation and ligation of the biliopancreatic duct in Lewis rats weighing 250-350 g. The animals were divided into 3 groups: group A, sham operation; group B, induction of pancreatitis and no further treatment, and group C, induction of pancreatitis + daily administration by gavage of a 5-ml/day suspension of Lp 299v at 0.5-1.0 x 10(9) bacteria/ml for 8 days, 4 days before and 4 days after induction of pancreatitis. All animals were sacrificed after 96 h. Histological studies and microbiological analyses were performed. RESULTS: At sacrifice, 40/55 animals showed signs of severe pancreatitis. Since acute pancreatitis was the specific disease investigated, only these animals were subjected to further study. In group B, we found pathogenic micro-organisms in the mesenteric lymph nodes in 14/20 animals and in the pancreatic tissue in 10/20. The bacterial flora consisted predominantly of E. coli, Enterococcus faecalis, Pseudomonas and Proteus species. In contrast, when the animals were kept under an 'umbrella' of Lp 299v, growth of E. faecalis or E. coli were detected only in 4/20 mesenteric lymph node cultures and in 3/20 pancreatic tissue cultures. CONCLUSIONS: Lp 299v is effective in reducing microbial translocation in experimental pancreatitis. Treatment with probiotic bacteria seems to be a promising alternative to antibiotic therapy.