[Utility of computerized vascular access monitoring: a pilot study].

The surveillance of a vascular access (VA) is of primary importance for its outcome and for the patients' survival. However, there is still confusion about its usefulness, who should make it (physician or nurse) and when, and what is the best functional test to use. This retrospective analysis reports our experience of VA monitoring; it is based on the collaboration between concept doctors and nurses and on parameters integration, realized with the help of a software for vascular access monitoring (SMAV) designed by us. The analysis confronts the data gathered on a group of 100 patients, 13 months before the adoption of the SMAV, and another 100 patients, 19 months after. Of these patients, 13 belonged to both groups and were "controls of themselves". The number of thrombosis and angioplasties (PTA) plummeted in the 19 months in which the SMAV was used, from 10 (10%; 0.008 thrombosis/patient month) to 1 (1%; 0.0005 thrombosis/patient month) (p <0.01) and from 49 (49%; 0.037 PTA/patient month) to 27 (27%; 0.014PTA/patient month) (p <0.05) respectively. In the 13 control patients, a reduction of 70% in the number of PTA (from 26 to 8) was observed. SMAV allowed us to integrate the many functional parameters, making it easy to share information, encouraging teamwork, strengthening professional skills, and favouring the best management of AVs. The result was a reduction in thrombotic events and, surprisingly, a reduction of the need for PTA, most likely thanks to the higher level of attention in the evaluation and puncture of AV.

[Covid-19 in patients on dialysis: infection prevention and control strategies].

Covid-19 is a disease caused by a new coronavirus presenting a variability of flu-like symptoms including fever, cough, myalgia and fatigue; in severe cases, patients develop pneumonia, acute respiratory distress syndrome, sepsis and septic shock, that can result in their death. This infection, which was declared a global epidemic by the World Health Organization, is particularly dangerous for dialysis patients, as they are frail and more vulnerable to infections due to the overlap of multiple pathologies. In patients with full-blown symptoms, there is a renal impairment of various degrees in 100% of the subjects observed. However, as Covid-19 is an emerging disease, more work is needed to improve prevention, diagnosis and treatment strategies. It is essential to avoid nosocomial spread; in order to control and reduce the rate of infections it is necessary to strengthen the management of medical and nursing personnel through the early diagnosis, isolation and treatment of patients undergoing dialysis treatment. We cover here a series of recommendations for the treatment of dialysis patients who are negative to the virus, and of those who are suspected or confirmed positive.

[The ambiguous concept of predialysis: proposal for a model]. / L'ambiguita' del concetto di predialisi: proposta di un modello.

In 2009, 90% of nephrology centers in Lombardy declared to have a ''predialysis'' outpatient department, without, however, specifying its meaning. Research carried out in 2008 among nephrology centers in Piemonte showed how ambiguous this term was. According to the 2007 EDTA-ERA Registry, about 68% of European nephrology centers stated that they had an outpatient department for stage 4-5 CKD patients, but no information was available about the role of patients in the choice of dialysis. It is known that when the predialysis phase is poorly managed, the patient's rehabilitation will be more difficult. Dissatisfaction with dialysis often leads to withdrawal from dialysis, as several registries have shown. For this reason, we created a predialysis course at our center, involving a nephrologist, a nurse, and a dietician. The nephrologist helps the patient choose the most suitable therapeutic strategy, which means that doctor and patient share the responsibility for the treatment choice. The offered options are hemodialysis, peritoneal dialysis, preemptive kidney transplant, and a conservative dietary-pharmacological program. The nurse plans at least 4 meetings: 1) to talk with the patient in order to get to know him or her and his/her family; 2) to provide information about the dialysis procedure and establish the patient's preferences; 3) to clear any doubts about the treatment and deliver a booklet with information about the chosen dialysis procedure; 4) to explain the chosen dialysis procedure; 5) to meet the patient after their preparation for dialysis (vascular access or peritoneal catheter). The dietician manages the dietary programs both for patients who are close to starting dialysis and those on a longlasting conservative program. The predialysis course includes a meeting among all those involved with the patient (nephrologists, nurses, dieticians) to exchange information with the purpose of shared evaluation and decision-making.