An Alternative and Up-To-Date Recommendation for a Proper Site for Parathyroid Transplantation: The Omentum.

OBJECTIVES: Various sites have been used for parathyroid allotransplant, such as injection into the forearm, sternocleidomastoid, or deltoid muscles. However, transplant efficiency in these regions varies according to the results reported in the literature and also obtained from our previous studies. Using the omentum "as a natural incubator" for composite tissue-derived cell transplants to increase transplant success is possible. MATERIALS AND METHODS: To examine the efficiency of transplant sites for parathyroid allotransplant, we compared clinical cases from the literature and our experience with 23 cases. The omental transplant process is performed under general anesthesia by laparoscopic intervention. The abdominal cavity is visualized with an endocamera from a 5-mm trocar. With the help of a flexible catheter from another 5-mm trocar, microencapsulated or naked parathyroid cells are deposited on the omentum in approximately 30 mL of isotonic saline. The trocar sites are then sutured, and the surgery is terminated. Recipients were followed for 6 months with examination of biochemical parameters (parathormone, calcium, and phosphorus levels), medication use, and clinical scoring. RESULTS: In the 23 patients who received parathyroid allotransplants over the omentum, 7 recipients did not exhibit any changes according to the scoring system criteria. However, on average, serum calcium and phosphorus levels remained within the healthy reference range. In addition, use of oral medications among patients decreased, indicating successful transplant survival. These results were consistent with a significant decrease in hypocalcemia symptoms among patients. CONCLUSIONS: In the 23 patients, the success rate was 69.5% for the first 6-month period after transplant. Recent developments and large cohorts are needed to demonstrate the higher efficacy of parathyroid allotransplant over the omentum.

The Challenge of Preoperative Panel Reactive Antibody Positivity in Parathyroid Transplantation.

OBJECTIVES: Identifying suitable recipient criteria and matching recipients with appropriate donors are required to increase survival for parathyroid transplant. This study was undertaken to evaluate transplant survival rates while comparing preoperative panel reactive antibody positivity. MATERIALS AND METHODS: The study included 14 hypoparathyroidism patients who presented to our clinic for parathyroid transplant. Preoperative ABO compatibility and negative cross-match tests were prioritized for recipient-donor matching, and panel reactive antibody screening tests were performed. During the 24-month follow-up, we evaluated medication use and serum calcium, phosphorus, and parathormone levels of patients. RESULTS: Preoperative panel reactive antibody positivity was assessed in 3 groups. The HLA class I-positive group (mean fluorescence intensity range, 179-1770) showed decreased medication use and stability in serum calcium levels. The HLA class IIpositive (mean fluorescence intensity range, 85-3959) showed decreased medication use by 25% to 50% and returned to their former prescription doses after 12 months. An opposite pattern was observed in 2 patients with panel reactive antibody positivity for both HLA classes (mean fluorescence intensity range, 462-2289), with 1 patient requiring medication for continuing symptoms and the other patient occasionally taking additional magnesium supplementation, despite decreased medication doses after 12 months. Serum calcium levels remained normal, and parathormone and phosphorus levels were elevated. CONCLUSIONS: Improving patient symptoms and having no requirement for intravenous calcium replacement are priorities, and monitoring serum levels is the next important step. Varied panel reactive antibody positivities and survival rates indicate a requirement, and each HLA class could require a proper limitation for the mean fluorescence intensity. Preoperative mean fluorescence intensity cut-off value should be <900. Higher mean fluorescence intensity values in panel reactive antibody screenings could increase risk of short-term graft survival after parathyroid transplant. Further studies should include immunological risk assessments by individualizing the outcome with donor-specific antibodies.

Conservative kidney management and kidney supportive care: core components of integrated care for people with kidney failure.

Integrated kidney care requires synergistic linkage between preventative care for people at risk for chronic kidney disease and health services providing care for people with kidney disease, ensuring holistic and coordinated care as people transition between acute and chronic kidney disease and the 3 modalities of kidney failure management: conservative kidney management, transplantation, and dialysis. People with kidney failure have many supportive care needs throughout their illness, regardless of treatment modality. Kidney supportive care is therefore a vital part of this integrated framework, but is nonexistent, poorly developed, and/or poorly integrated with kidney care in many settings, especially in low- and middle-income countries. To address this, the International Society of Nephrology has (i) coordinated the development of consensus definitions of conservative kidney management and kidney supportive care to promote international understanding and awareness of these active treatments; and (ii) identified key considerations for the development and expansion of conservative kidney management and kidney supportive care programs, especially in low resource settings, where access to kidney replacement therapy is restricted or not available. This article presents the definitions for conservative kidney management and kidney supportive care; describes their core components with some illustrative examples to highlight key points; and describes some of the additional considerations for delivering conservative kidney management and kidney supportive care in low resource settings.

Risk factors for high fall risk in elderly patients with chronic kidney disease.

PURPOSE: Patients with chronic kidney disease (CKD) usually represent an aging population, and both older age and CKD are associated with a higher risk of falling. Studies on risk factors among subjects with CKD are lacking. METHODS: Records of outpatients from one geriatric clinic in Turkey were retrospectively reviewed. A result of ≥ 13.5 s on the timed up and go (TUG) test was accepted as a high risk of falls. Independent predictors of an increased risk of falls among subjects with CKD (estimated glomerular filtration rate of < 60 mL/min/1.73 m2) were identified using logistic regression models. RESULTS: Patients with CKD (n = 205), represented the 20.2% of the entire cohort and was identified as an independent predictor of increased fall risk (OR 2.59). Within the CKD cohort, serum folic acid levels and frailty were independent predictors of an increased risk of falls. The CKD/fall risk group was older, had a lower median years of education, lower vitamin D levels, and lower serum folic acid levels than the CKD/non-fall risk group. In addition to higher serum creatinine and potassium levels, the only significant difference between patients with CKD/fall risk and a matched non-CKD/fall risk was a lower median folic acid level in the former group. CONCLUSIONS: Frailty and low folic acid levels are independently associated with an increased risk of falls among elderly outpatients with CKD. Prevention of frailty may reduce the risk of falls in these subjects. Possible benefit of folic acid supplementation requires further studies.

Hemodialysis Experience of a Large Group of Syrian Refugees in Turkey: All Patients Deserve Effective Treatment.

BACKGROUND/AIMS: Refugee dialysis is a worldwide growing dilemma with limited experience. This report presents the largest hemodialysis (HD) patient registry data of Syrian refugees in Turkey. METHODS: Demographic, clinical, laboratory, and dialysis practice data of 345 Syrian HD patients during one year were collected and analyzed. RESULTS: There were 345 prevalent Syrian HD patients at the end of 2016. Majority of the patients were placed in the Southeast Anatolian Region. The majority of the patients (74.8%) are in the age range of 20-64 years. Dialysis vintage in Turkey is less than 12 months in 20.8% and less than one month in 29.3% of patients. The vascular access was arteriovenous fistula in the majority of patients (72.5%). Kt/V is over 1.7 in 57%, serum albumin is above 35 g/L in 65.8% and hemoglobin level is more than 100 g/L in %65.2 of the patients. The ratio of patients with serum phosphorus level of 1.13-1.77 mmol/L was 56.2%. Twenty Syrian HD patients (14 male, 6 female) died within the year 2016 and annual mortality rate was 5.7%. CONCLUSION: This study with the largest number of Syrian refugees undergoing maintenance hemodialysis showed good dialysis practices, acceptable values for dialysis adequacy and biochemical parameters along with lower mortality compared to native HD population of Turkey. Longer follow up will enrich the knowledge related to care of refugee population in all over the world.

Factors effective on peritoneal phosphorus transport and clearance in peritoneal dialysis patients
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AIMS: Transport characteristics of phosphorus are different from other small solutes that are evaluated in routine peritoneal equilibration test (PET) in peritoneal dialysis (PD) patients. We aimed to evaluate peritoneal phosphorus clearance and permeability, and their relationship with peritoneal membrane transport type and creatinine clearance as well as factors affecting peritoneal phosphorus clearance. METHODS: 70 adult patients on a PD program were included in our study. Phosphorus transport status was classified according to dialysate/plasma (D/P) phosphorus at the 4th hour of PET as slow transporter (< 0.47), slow-average transporter (0.47 - 0.56), fast-average transporter (0.57 - 0.67), and fast transporter (> 0.67). We evaluated the relationship of peritoneal phosphorus clearance and transport type with PD regime, phosphorus level, and presence of residual renal function in addition to investigating factors that are effective on peritoneal phosphorus clearance. RESULTS: D/P phosphorus and peritoneal phosphorus clearance were positively correlated with D/P creatinine and peritoneal creatinine clearance, respectively. Automated PD and continuous ambulatory PD patients were similar regarding phosphorus and creatinine clearances and transport status based on D/P phosphorus. The major determinant of peritoneal phosphorus clearance was anuria status. Anuric patients had higher dialysate volume (11.6 ± 3.0 L vs. 8.4 ± 2.1 L, p < 0.001) and therefore higher peritoneal phosphorus clearance (61.7 ± 15.1 L/week/1.73 m2 vs. 48.4 ± 14.0 L/week/1.73 m2, p = 0.001). Hyperphosphatemia was present in 40% and 11% of anuric patients and those with residual renal function, respectively (p = 0.005). CONCLUSIONS: Peritoneal phosphorus transport characteristics are similar to that of creatinine. Although increased dialysis dose may increase peritoneal phosphorus clearance, it may be insufficient to prevent hyperphosphatemia in anuric patients.
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The efficacy of n-acetylcysteine in preventing contrast-induced nephropathy in type 2 diabetic patients without nephropathy.

BACKGROUND: N-acetylcysteine (NAC) is reported to have potential for prevention of contrast-induced nephropathy(CIN), however, there is not enough data related to its effects on diabetic patients without nephropathy. METHODS: A total of 45 diabetic patients without nephropathy undergoing a computerized tomography (CT) investigation and who would be receiving radio-opaque medication (300 mg iohexaol/100 mL) were enrolled. They were randomized to have either high-dose NAC (1200 mg) plus saline hydration (Group 1, n=25) or only saline hydration (Group 2; n=20). Serum creatinine levels were determined 72 hours post-contrast. CIN was defined as 0.3 mg/dL elevation of creatinine from baseline and/or an increment of 20% over baseline creatinine and/or 20% decrement of estimated GFR. RESULTS: In Group 1, serum creatinine decreased from 0.83 to 0.79 mg/dL, whereas serum creatinine increased from 0.81 to 0.94 mg/dL in Group 2 (not significant for both groups). However there was a significant difference between the creatinine variation of two groups (p=0.031). Furthermore, the groups were analyzed according to overall incidence of CIN. The increase of serum creatinine and decrement of estimated GFR in Group 2 were significantly higher than in Group 1. CONCLUSION: Adding NAC to saline hydration seems more beneficial than saline hydration alone in preventing contrast-induced renal function deterioration in type 2 diabetic patients without nephropathy.

Treatment modalities and outcome of the renal victims of the Marmara earthquake.

BACKGROUND/AIMS: Treatment of renal problems during natural catastrophes is highly complicated both for medical and logistic reasons. The therapeutic interventions applied to and the outcome of 639 victims with acute renal problems during the catastrophic Marmara earthquake have been the subject of this study. METHODS: Questionnaires regarding information about 63 clinical and laboratory variables were sent to 35 reference hospitals that treated the victims. Information considering therapeutic interventions and outcome obtained through these questionnaires was submitted to analysis. RESULTS: At least one form of renal replacement therapy was administered to 477 (74.6%) of the 639 victims. Of these, 437, 11, and 4 were treated solely by intermittent hemodialysis, continuous renal replacement therapy, and peritoneal dialysis, respectively; 25 victims needed more than one dialysis modality. In total, 5,137 hemodialysis sessions were performed. Also, 2,981, 2,837 and 2,594 units of blood, fresh frozen plasma, and human albumin were administered, respectively. Transfusion of these products was usually associated with higher rates of dialysis needs and mortality. Ninety-seven patients (15.2%) died. The mortality rate of dialyzed victims was higher as compared to nondialyzed ones (17.2 vs. 9.3%, p = 0.015). CONCLUSIONS: Massive amounts of dialysis treatment as well as blood and blood product transfusions can be necessary in the treatment of catastrophic earthquake victims with nephrological problems. Despite the potential risk of a high mortality, in the case of appropriate and energetic medical interventions, reasonable final outcomes can be achieved.