Changes in renal papillary density after hydration therapy in calcium stone formers.

BACKGROUND: Previous studies have shown that, compared with non-stone formers, stone formers have a higher papillary density measured with computer tomography (CT) scan. The effect of increased hydration on such papillary density in idiopathic calcium stone formers is not known. METHODS: Patients with recurrent calcium oxalate stones undergoing endourological procedures for renal stones at our Institution from June 2013 to June 2014 were considered eligible for enrolment. Enrolled patients underwent a baseline unenhanced CT scan before the urological procedure; after endoscopic removal of their stones, the patients were instructed to drink at least 2 L/day of a hypotonic, oligomineral water low in sodium and minerals (fixed residue at 180 °C < 200 mg/L) for at least 12 months. Finally, the patients underwent a follow-up unenhanced CT scan during hydration regimen. RESULTS: Twenty-five patients were prospectively enrolled and underwent baseline and follow-up CT scans. At baseline, mean papillary density was 43.2 ± 6.6 Hounsfield Units (HU) (43.2 ± 6.7 for the left kidney and 42.8 ± 7.1 HU for the right kidney). At follow-up and after at least 12 months of hydration regimen, mean papillary density was significantly reduced at 35.4 ± 4.2 HU (35.8 ± 5.0 for the left kidney and 35.1 ± 4.2 HU for the right kidney); the mean difference between baseline and follow-up was - 7.8 HU (95% confidence interval - 10.6 to - 5.1 HU, p < 0.001). CONCLUSIONS: Increased fluid intake in patients with recurrent calcium oxalate stones was associated with a significant reduction in renal papillary density. TRIAL REGISTRATION: NCT03343743 , 15/11/2017 (Retrospectively registered).

Bilateral Ureteral Stent Removal after 15 Years: A Case Report.

We present the first reported case of a patient with a forgotten ureteral stent. A 68-year-old woman had undergone radical hysterectomy for cervical cancer in 1997, at which time bilateral ureteral stents were placed. She was admitted to our hospital with stranguria, dysuria, and lower back pain of 10 days duration. Preoperative radiologic evaluation revealed the presence of ureteral stents, which had been in place since 1997. With the patient under general anesthesia, the bilateral stents were removed by urethral cystoscopy. No stone formation was noted. The procedure was easy and fast, and no intraoperative complications occurred.

The Risk of Chronic Kidney Disease Associated with Urolithiasis and its Urological Treatments: A Review.

PURPOSE: Urolithiasis can impair kidney function. This literature review focuses on the risk of kidney impairment in stone formers, the specific conditions associated with this risk and the impact of urological surgery. MATERIALS AND METHODS: The PubMed® and Embase® databases were searched for publications on urolithiasis, its treatment, and the risk of chronic kidney disease, end stage renal disease and nephrectomy in stone formers. RESULTS: In general, renal stone formers have twice the risk of chronic kidney disease or end stage renal disease, and for female and overweight stone formers the risk is even higher. Patients with frequent urinary tract infections, struvite stones, urinary malformations and diversions, malabsorptive bowel conditions and some monogenic disorders are at high risk for chronic kidney disease/end stage renal disease. Shock wave lithotripsy or minimally invasive urological interventions for stones do not adversely affect renal function. Declines in renal function generally occur in patients with preexisting chronic kidney disease or a large stone burden requiring repeated and/or complex surgery. CONCLUSIONS: Although the effect size is modest, urolithiasis may cause chronic kidney disease and, thus, it is mandatory to assess patients with renal stones for the risk of chronic kidney disease/end stage renal disease. We suggest that all guidelines dealing with renal stone disease should include assessment of this risk.

OnabotulinumtoxinA injection therapy in men with LUTS due to primary bladder-neck dysfunction: objective and patient-reported outcomes.

OBJECTIVE: To determine efficacy and safety of OnabotulinumtoxinA (BoNT-A) injection therapy in medically refractory patients with lower urinary tract symptoms (LUTS) due to primary bladder-neck dysfunction (PBND). MATERIALS AND METHODS: Thirty-five consecutive ambulatory males diagnosed with PBND and refractory to medical therapy, with IPSS > 15, Qmax < 15 ml/sec, and total prostate volume < 30 cm(3), were screened from January 2010 to December 2011. Eligible patients underwent transurethral bladder-neck injection of BoNT-A (200 U, 50 U/ml × 4 sites) and were assessed at baseline, 2-, 6-, 9-, and 12-month postprocedure and until duration of clinical response. The primary outcome was the change from baseline in total IPSS, and secondary outcome were storage- and voiding-IPSS, QoL score, Qmax, and postvoiding residual volume (PVR), patient-reported outcomes. Adverse effects were also recorded, including ejaculatory dysfunctions. RESULTS: Of 30 enrolled patients (mean age 33.8 years), 29 (96.7%) completed the study. A statistically significant improvement of total IPSS was observed from 21.9 at baseline, to 7.8, 10.3, and 16.6 at 2, 6, and 9 months, respectively (P < 0.000). Statistically significant improvements from baseline of storage- and voiding-IPSS, QoL score, Qmax, and PVR were also observed until 9-month postprocedure. The proportion of patients with overall satisfaction was favorable although decreasing from 80% at 2 months, to 44.8% at 12 months. No significant adverse effects or ejaculatory dysfunctions were noted. CONCLUSIONS: BoNT-A injection therapy appears effective and safe in medically refractory men with PBND, although repeated procedures are required for long-term sustained benefit. Randomized controlled trials are warranted in order to corroborate these results.

When to suspect a genetic disorder in a patient with renal stones, and why.

Nephrolithiasis is a common disorder, with a rising prevalence in the general population. Its pathogenesis is still unclear, but a role for genetics has long been recognized, especially in cases of the more common calcium nephrolithiasis. Although relatively rare, monogenic causes of hypercalciuria and nephrolithiasis do exist and their timely recognition is important from a prognostic and therapeutic viewpoint. This article reviews the clinical and laboratory findings characterizing inherited causes of nephrolithiasis with a view to helping clinicians to recognize and manage these rare conditions.

Sexual outcomes after organ potency-sparing surgery and glans reconstruction in patients with penile carcinoma.

INTRODUCTION: Radical surgery is the "gold standard" for treatment of invasive penile carcinoma but very poor aesthetic, functional and psychological outcomes have been reported. Our purpose was to assess the impact of organ potency-sparing surgery in locally confined carcinoma of the penis. MATERIALS AND METHODS: We evaluated retrospectively 42 patients with early penile cancer (Ta,T1,T2), treated with glandulectomy and glanduloplasty with urethral mucosa and sparing of cavernosal apexes, or glandulectomy and limited apical resection in cases of Stage T2. Sexual function, ejaculation and libido were evaluated with an IIEF-15 questionnaire before the appearance of neoplasia (about three months before the surgery) and six months after surgery. Quality of life was evaluated by the Bigelow-Young questionnaire. The scores relating to two weeks prior to the surgery have been compared to those obtained six months after surgery. The statistical analysis was conducted using t-Student for repeated measures and analysis of variance. RESULTS: Six months after surgery 73% of patients reported spontaneous rigid erections, 60% coital activity while 76% of the group treated with urethral glanduloplasty reported normal ejaculation and orgasm, regained an average of 35 days after surgery. The average IIEF-15 scores reported in the entire series in the domains of erection, libido and coital activity of the pre-cancer period were not statistically different than those recorded six months after surgery. In the group treated with glandular reconstruction, pre-and postoperative IIEF-15 mean scores related to ejaculation and orgasm domains were not significantly different. Mean scores of Bigelow-Young questionnaires related to sexual pleasure, familial, social and professional relationships showed significant improvement after surgery. CONCLUSIONS: Potency sparing-sparing surgical treatments have a positive impact on a wide spectrum of the patient's life including family relationships, and social and working conditions.

Efficacy of an assisted low-intensity programme of perioperative pelvic floor muscle training in improving the recovery of continence after radical prostatectomy: a randomized controlled trial.

UNLABELLED: Study Type - Therapy (RCT) Level of Evidence 1b. What's known on the subject? and What does the study add? Peri-operative pelvic floor muscle training reduces urinary incontinence for men undergoing radical prostatectomy (RP). A preoperative biofeedback session, combined with postoperative pelvic floor muscle training, and assisted sessions on a monthly basis only, is an effective low-intensity programme to improve recovery of continence in patients undergoing RP. OBJECTIVE: To evaluate the efficacy of preoperative biofeedback (BFB) combined with an assisted low-intensity programme of postoperative perineal physiokinesitherapy in reducing the incidence, duration and severity of urinary incontinence (UI) in patients undergoing radical prostatectomy (RP). PATIENTS AND METHODS: A prospective, single-centre, randomized controlled clinical study was designed. • The intervention group received a training session with BFB, supervised oral and written instructions on Kegel exercises and a structured programme of postoperative exercises on the day before open RP. After RP, patients received control visits, including a session of BFB, at monthly intervals only. • The control group received, after catheter removal, only oral and written instructions on Kegel exercises to be performed at home. Patients received control visits at 1, 3 and 6 months after catheter removal. • At each visit the number of incontinence episodes, the number of pads used and patient-reported outcome measures (International Consultation on Incontinence Questionnaire on Urinary Incontinence [ICIQ-UI], [ICIQ]-Overactive Bladder [OAB], University of California, Los Angeles-Prostate Cancer Index [UCLA-PCI], International Prostate Symptom Score-Quality of Life [IPSS-QoL]) were assessed in both groups. All patients were followed-up for a period of at least 6 months after catheter removal. • The primary outcome was the recovery of continence, strictly defined as a ICIQ-UI score of zero. RESULTS: Overall, 34 consecutive patients were eligible and 32 were available for the final analysis: 16 patients for each study group. The two groups were homogeneous for all pre- and intraoperative features examined. • In the intervention group, continence had been achieved by six, eight and 10 patients at 1-, 3- and 6-month follow-ups, respectively, vs no patients (P= 0.02), one patient (P= 0.01) and one patient (P= 0.002) in the control group at each follow-up, respectively. • The analysis of the UCLA-PCI and ICIQ-OAB scores, the number of incontinence episodes per week and the number of pads per week showed significant differences in favour of patients in the intervention group at 3 and 6 months. • Patients in the intervention group reported better IPSS-QoL scores at all follow-up times but the difference did not reach statistical significance. CONCLUSIONS: Preoperative BFB combined with a postoperative programme of perineal physiokinesitherapy and assisted sessions on a monthly basis only, is a treatment strategy significantly more effective than the standard care in improving recovery of continence in patients undergoing RP. • The impact on QoL appeared less evident, although a trend for a better QoL was observed in the intervention group.

Patient-reported outcomes in men with lower urinary tract symptoms (LUTS) due to benign prostatic hyperplasia (BPH) treated with intraprostatic OnabotulinumtoxinA: 3-month results of a prospective single-armed cohort study.

UNLABELLED: Study Type--Therapy (prospective cohort) Level of Evidence 3a. What's known on the subject? and What does the study add? Several short-term studies have shown that intraprostatic injection of botulinum toxin (BTX) improves lower urinary tract symptoms and flow parameters in patients with BPH, but information on patient-reported outcomes is lacking. The present study provides useful data on patient-perceived level of improvement and effectiveness of intraprostatic injection of BTX, as well as on patient's satisfaction with this therapy. Short-term results are promising and comparable with those reported with standard pharmacological therapy. OBJECTIVE: • To evaluate patient-reported and objective outcomes after intraprostatic injection of OnabotulinumtoxinA (BTX-A) in men with lower urinary tract symptoms (LUTS) due to benign prostatic hyperplasia (BPH). PATIENTS AND METHODS: • A prospective single-armed cohort study was designed. • Patients diagnosed with LUTS due to BPH and unsatisfactory response to medical therapy, were recruited between November 2010 and July 2011. • Patients received transperineal injection of 200 U BTX-A in the transition zone, under transrectal ultrasonographic guidance. • The outcome assessment was performed at 3 months and included a patient-reported outcomes (PROs) questionnaire with questions on patient global impression of improvement (PGI-I, 0-6 point scale), of satisfaction (PGI-S, 0-5 point scale), and of efficacy (PGI-E, 0-5 point scale). RESULTS: • Of 75 screened patients, 64 with a mean (sd) age of 63 (9.3) years were available for the outcome assessment. • Patients reported a mean reduction of 49% in International Prostate Symptom Score (IPSS), which decreased from 19.7 (7.7) to 10 (7.1) (P < 0.001), and a mean reduction of 44% in IPSS-health-related quality of life item score, from 4.17 (1.2) to 2.3 (1.6) (P < 0.001). • There was a 33% increase in maximum urinary flow rate (P < 0.001) and an 80% reduction in postvoid residual urine volume (P < 0.001). • In all, 36 (56%) patients had a subjective improvement in LUTS (PGI-I ≥ 4), 43 (67%) reported satisfaction with the treatment (PGI-S ≥ 3), and 44 (68%) judged the treatment as effective (PGI-E ≥ 3). In all, 50 (79%) patients would repeat the same treatment under the same circumstances, while 54 (84%) would recommend the treatment to another person with the same diagnosis. • There was a statistically significant positive correlation between patients' satisfaction and both baseline IPSS (ρ 0.441, P < 0.001) and reduction rate of the IPSS (ρ 0.850, P < 0.001). CONCLUSIONS: • Intraprostatic injection of BTX-A in men with LUTS due to BPH provides clinically significant short-term subjective and objective benefit. • Increasing severity of baseline LUTS appears moderately associated with the patient-perceived benefit from the treatment. • Although the non-randomised design and short-term assessment limit the level of evidence of our study, intraprostatic BTX-A seems a promising, safe and minimally invasive option for patients with BPH with unsatisfactory response to standard drug therapy.

Imaging in prostate cancer staging: present role and future perspectives.

Despite recent improvements in detection and treatment, prostate cancer continues to be the most common malignancy and the second leading cause of cancer-related mortality. Thus, although survival rate continues to improve, prostate cancer remains a compelling medical health problem. The major goal of prostate cancer imaging in the next decade will be more accurate disease characterization through the synthesis of anatomic, functional, and molecular imaging information in order to plan the most appropriate therapeutic strategy. No consensus exists regarding the use of imaging for evaluating primary prostate cancer. However, conventional and functional imaging are expanding their role in detection and local staging and, moreover, functional imaging is becoming of great importance in oncologic management and monitoring of therapy response. This review presents a multidisciplinary perspective on the role of conventional and functional imaging methods in prostate cancer staging.

Complications of extracorporeal shock wave lithotripsy for urinary stones: to know and to manage them-a review.

To identify the possible complications after extracorporeal shock wave lithotripsy (SWL) and to suggest how to manage them, the significant literature concerning SWL treatment and complications was analyzed and reviewed. Complications after SWL are mainly connected to the formation and passage of fragments, infections, the effects on renal and nonrenal tissues, and the effects on kidney function. Each of these complications can be prevented adopting appropriate measures, such as the respect of the contraindications and the recognition and the correction of concomitant diseases or infection, and using the SWL in the most efficient and safe way, tailoring the treatment to the single case. In conclusion, SWL is an efficient and relatively noninvasive treatment for urinary stones. However, as with any other type of therapy, some contraindications and potential complications do exist. The strictness in following the first could really limit the onset and danger of the appearance of others, which however must be fully known so that every possible preventive measure be implemented.

Urological complications following inguinal hernioplasty.

Aim of this paper is to report a systematic review of the literature about the incidence and putative mechanisms of genital tract injuries following open and laparoscopic herniorraphy and their effects on sexual function and fertility and to point out the measures of prevention and of treatment. The most frequently described events have been intraoperative complications as bladder or spermatic cord structure damage, immediate postoperative complications as ischaemic orchitis, urinary retention, urinary tract infection, hydrocele or scrotal haematoma and bacterial orchitis, or long-term complications as chronic orchialgia, testis atrophy, sexual dysfunction and infertility. The evidence of literature shows that urological complication after hernioplasty are under-reported. Only a small number of studies to date have essentially dealt with sexual quality of life after inguinal hernia surgical repair. The sexual needs of patients with groin hernias are rarely discussed. Extensive laparoscopic procedures, due to the need of learning curve, have increased the risk of vas damage and infertility in young patients candidate to hernioplasty. Early diagnosis prevents urological complication as well as possible legal claims after hernia repair: it should be include careful history, objective and subjective symptoms and signs of uro-genital pathologies, lab data when necessary, immediate eco-color-Doppler imaging and urgent urological consultation. Despite the lack of prospective randomized trials, there is a growing evidence in literature about positive impact of hernioplasty on sexual function, encouraging future studies on this issue.

Hot topics in urological health economics. A mini review.

Urological diseases are becoming a major public health problem. In fact, they increasingly weigh on the economy of a country due to the high direct costs and the consequent significant loss of productivity. Prostate cancer represents 11% of the costs for the treatment of all cancers in the United States with $8 billion and a cost per-patient from diagnosis to death of $81,658. Instead bladder cancer has the higher costs per-patient in terms of medical care, from diagnosis until death (U.S. $ 96,553). In Italy, in a reference hospital, the average costs of non muscle-invasive forms treated with endoscopic resection (TURB) and infiltrating forms treated with radical cystectomy are approximately Euro 2242.20 and Euro 6860 respectively, but they increase due to the follow-up and the ancillary treatments. In the field of functional disease, in the U.S. the average annual expenditure per capita for incontinence, including inpatient and outpatient services is $1382. While for patients who had undergone surgery the average total spending rose to $3620. For overactive bladder the total cost in the United States is estimated at 12.02 billion U.S. dollars, with $9.17 billion allocated to the community costs and $ 2.85 billion for institutional costs. However, further pharmacoeconomic studies are required to better understand the net economic impact of any alternative strategies to those actually present. Stone disease is a highly prevalent and costly condition for which United States total health care expenditures, in the year 2000, were estimated to be almost $ 2.1 billion. Treatment of nephrolithiasis depends on stone size and location, but typically involves a surgical procedure such as extracorporeal shock wave lithotripsy (ESWL), ureteroscopic laser lithotripsy, percutaneous nephrostolithotomy (PCNL) or open stone surgery with an average expenditure per procedure of $2295, $1425, $3624, $2916 respectively.

Ureterorenoscopy: avoiding and managing the complications.

Retrograde exploration of the ureter and kidneys is currently a widely used and well-established procedure to deal with problems of a diagnostic and therapeutic nature with reduced invasiveness. The process of miniaturizing the instruments combined with the steady improvement in video quality has continuously amplified its potential applications, maintaining the procedure safe and rapid. During an operation, however, unexpected events may condition a change to the programme or determine the onset of even more serious complications. Our aim is to analyze such events and complications and recommend potential solutions to prevent and/or deal with such happenings.

Imaging in prostate cancer diagnosis: present role and future perspectives.

Prostate cancer (PCa) remains a major health concern for the male population. Detection and primary diagnosis of PCa are based on digital rectal examination, serum prostate-specific antigen levels, and transrectal ultrasound (TRUS)-guided random biopsy. Moreover, the gold standard for detecting PCa, systematic biopsy, lacks sensitivity as well as grading accuracy. This review summarizes recent developments of ultrasonography modalities and functional magnetic resonance imaging (MRI) in the diagnosis of PCa. A comparison between the different methods is presented, including their clinical value and usefulness. It is concluded that innovative ultrasound techniques (including ultrasound contrast agents, 3-D and 4-D sonography, elastography and harmonic sonography) promise benefits in comparison to standard TRUS to accurately diagnose PCa. Promising advances have been made in the detection of PCa with multiparametric MRI. The combination of conventional and functional MRI techniques (including diffusion-weighted imaging, dynamic contrast-enhanced MRI, and MR spectroscopy) can provide information for differentiating PCa from noncancerous tissue and can be used for MRI-guided biopsies, especially in patients with persistent elevation of serum prostate-specific antigen and previous negative TRUS-guided biopsies. However, functional MRI technique and MRI-guided biopsy remain expensive and complex tools presenting inherent challenges.

Imaging of renal cell carcinoma: state of the art and recent advances.

BACKGROUND AND AIM: Renal cell carcinoma (RCC) is the 13th most common cancer worldwide and accounts for 4% of all adult malignancies. Herein the state of the art and recent advances in cross-sectional radiological imaging applied to RCC are reviewed, including ultrasonography, computed tomography, magnetic resonance imaging, and positron emission tomography. METHODS: Literature search of peer-reviewed papers published by October 2010. RESULTS: In front of more conventional and widespread imaging tools, such as ultrasonography and computed tomography, an array of newer and attractive radiological modalities are under investigation and show promise to improve our ability to noninvasively detect renal tumors and its recurrences, accurately assess the extent of the disease, and reliably evaluate treatment response, particularly in the era of antiangiogenetic therapy. CONCLUSIONS: Recent major advances in radiological imaging techniques have considerably improved our ability to diagnose, stage and follow-up RCC. Further studies are needed to evaluate the potential of most recent and still investigational imaging tools.

Intensive intravesical mitomycin C therapy in non-muscle-invasive bladder cancer: a dose intensity approach.

OBJECTIVE: The aim of this work was to verify the tolerability and the preliminary clinical results of intensive intravesical instillations of a mitomycin C (MMC) regimen. PATIENTS AND METHODS: From September 2007 to November 2009, 40 consecutive evaluable patients with pathologically confirmed intermediate-risk non-muscle-invasive bladder cancer (NMIBC) were enrolled after complete transurethral resection of all visible tumors. The mean age of the patients was 64.5 years. 40 mg MMC diluted in 50 ml of saline was instilled in the bladder three times a week for 2 weeks. The median follow-up was 9 months. RESULTS: All patients fulfilled the scheduled treatment. The local adverse events seen were negligible, while no significant deviation from normal values was observed in blood counts for each patient. Twenty-three of 40 patients (57.5%) showed negative at the cystoscopic control which was performed every 3 months with normal spontaneous and washing cytological exams. CONCLUSION: MMC is a well-known chemotherapeutic agent for the intravesical therapy of NMIBC. With a view to improving its results, we changed the frequency and intensity of the instillations. No significant local or systemic toxicity was reported. Intensive intravesical instillations of MMC might become a tool in the management of NMIBC.

Calcium oxalate nephrolithiasis: urinary "medium size peptides"analysis using MALDI-TOF mass spectrometry.

OBJECTIVE: Urinary lithiasis is one of the most common benign urological diseases. The pathogenic mechanisms of renal stone formation are complex and not clearly defined. We have studied the urinary protein composition of patients affected by calcium oxalate (CaOx) nephrolithiasis in a range of molecular weight between 1 and 5 kDa (medium size peptides). These molecules seem to have a double role in limiting the crystal adhesion to renal cells and at the same time in facilitating the degradation of crystals once internalised in cells. Their daily excretion is high, approximately 2-7 mg/die, even if studies have reported higher values. Our aim in surveying the urinary peptides was to look for qualitative difference in the medium size range, possible indication of the presence of a biomarker or any predisposing factors in patients affected by calcium oxalate nephrolithiasis. MATERIALS AND METHODS: The urinary protein composition of 17 patients (11 male, 6 female; mean age 45 yrs +/- 14SD) affected by CaOx nephrolithiasis was assessed in comparison with 17 healthy subjects. It was performed a qualitative assay using MALDI-TOF mass spectrometry (MS) in a range of molecular weight between 1 and 5kDa (medium size peptides). RESULTS: No differences were detected in the mass spectrums between patients and control subjects: all peaks overlapped. In addition, the values of peak intensity were comparable in both patient and control subject mass spectrums. CONCLUSIONS: In the range of molecular weight between 1 and 5 kDa, we have not detected significant differences in the urinary composition between stone former patients and healthy subjects. Our results warrant further research in different molecular size peptides.

[Diagnostic and therapeutic approach in patients with urinary calculi]. / Percorso diagnostico-terapeutico per il paziente con calcolosi urinaria.

The natural history of urolithiasis includes the risk of recurrence and of the development of chronic kidney and/or bone disease, which is why a thorough clinical and metabolic evaluation of these patients is of the utmost importance at disease onset. This paper is aimed at identifying the type of urolithiasis, the related risk factors, and the corresponding treatment options. The diagnostic and therapeutic approach described here includes 1) accurate history taking to detect secondary nephrolithiasis and screen for the main risk factors for kidney and bone disease; 2) metabolic evaluation graded according to different complexity levels based on the severity of the disease and the presence of risk factors; 3) carrying out appropriate imaging procedures. The resulting information allows to plan treatment based either on general rules of lifestyle and diet, or on selected medical intervention, if necessary. This report, which is based on current guidelines, was produced by the Gruppo Italiano di Studio Multidisciplinare per la Calcolosi Renale. It is addressed to all professionals involved in the management of patients suffering from nephrolithiasis, first of all general practitioners, who often become involved immediately at the onset of the disease.

A diagnostic-therapeutic pathway for patients with kidney stone disease: 2020 update / Percorso diagnostico-terapeutico per il paziente con calcolosi renale: update 2020

The natural history of urinary kidney stone disease includes the risk of relapses and can be associated with the risk of chronic kidney disease, bone and cardiovascular disease. For this reason, a wide clinical-metabolic assessment of the kidney stone patient is of great importance since the first presentation of the stone, to set an appropriate preventive treatment. The proposed diagnostic-therapeutic pathway includes a careful medical history, in order to highlight a secondary kidney stone disease and the main risk factors for kidney stones, chronic renal disease, or cardiovascular and bone disease; a metabolic evaluation on multiple levels, according to the severity of the disease, and the presence or absence of risk factors, and appropriate instrumental investigations. Thus, the information collected makes it possible to set a preventive treatment consisting of general rules and, if necessary, specific pharmacological or nutritional interventions. This paper has been prepared by the Italian Multidisciplinary Study Group for Kidney Stone Disease, and it is addressed to the several professional figures involved in the management of patients suffering from nephrolithiasis, from the emergency doctor to the general practitioner, urologist, nephrologist, radiologist, and dietician. A diagnostic-therapeutic pathway for patients with kidney stone disease was first published on this Journal in 2010. The present contribution aims at amending and updating the article published exactly ten years ago, to serve as an easy-to-use reference and to guide good clinical practice in this field.

Human factors in surgery: from Three Mile Island to the operating room.

Human factors is a definition that includes the science of understanding the properties of human capability, the application of this understanding to the design and development of systems and services, the art of ensuring their successful applications to a program. The field of human factors traces its origins to the Second World War, but Three Mile Island has been the best example of how groups of people react and make decisions under stress: this nuclear accident was exacerbated by wrong decisions made because the operators were overwhelmed with irrelevant, misleading or incorrect information. Errors and their nature are the same in all human activities. The predisposition for error is so intrinsic to human nature that scientifically it is best considered as inherently biologic. The causes of error in medical care may not be easily generalized. Surgery differs in important ways: most errors occur in the operating room and are technical in nature. Commonly, surgical error has been thought of as the consequence of lack of skill or ability, and is the result of thoughtless actions. Moreover the 'operating theatre' has a unique set of team dynamics: professionals from multiple disciplines are required to work in a closely coordinated fashion. This complex environment provides multiple opportunities for unclear communication, clashing motivations, errors arising not from technical incompetence but from poor interpersonal skills. Surgeons have to work closely with human factors specialists in future studies. By improving processes already in place in many operating rooms, safety will be enhanced and quality increased.