Non-thyroidal illness syndrome and SARS-CoV-2-associated multisystem inflammatory syndrome in children.

PURPOSE: COVID-19 disease may result in a severe multisystem inflammatory syndrome in children (MIS-C), which in turn may alter thyroid function (TF). We assessed TF in MIS-C, evaluating its impact on disease severity. METHODS: We retrospectively considered children admitted with MIS-C to a single pediatric hospital in Milan (November 2019-January 2021). Non-thyroidal illness syndrome (NTIS) was defined as any abnormality in TF tests (FT3, FT4, TSH) in the presence of critical illness and absence of a pre-existing hormonal abnormality. We devised a disease severity score by combining severity scores for each organ involved. Glucose and lipid profiles were also considered. A principal component analysis (PCA) was performed, to characterize the mutual association patterns between TF and disease severity. RESULTS: Of 26 (19 M/7F) patients, median age 10.7 (IQR 5.8-13.3) years, 23 (88.4%) presented with NTIS. A low FT3 level was noted in 15/23 (65.3%), while the other subjects had varying combinations of hormone abnormalities (8/23, 34.7%). Mutually correlated variables related to organ damage and inflammation were represented in the first dimension (PC1) of the PCA. FT3, FT4 and total cholesterol were positively correlated and characterized the second axis (PC2). The third axis (PC3) was characterized by the association of triglycerides, TyG index and HDL cholesterol. TF appeared to be related to lipemic and peripheral insulin resistance profiles. A possible association between catabolic components and severity score was also noted. CONCLUSIONS: A low FT3 level is common among MIS-C. TF may be useful to define the impact of MIS-C on children's health and help delineate long term follow-up management and prognosis.

Centred radio-frequency hyperthermia in solid tumours.

After some notions on the mechanisms of action of radio-waves on solid tumours, the treatise illustrates the results achieved in the first 125 cases of malignant tumours treated with this method, its results are definitely encouraging, even in cases apparently with no hope. It also describes briefly the histologic modifications induced by this therapeutic method on neoplastic masses and discusses the criteria of the directions of thermotherapy, alone or combined, which is obviously the fifth weapon against tumours.

Caudal anesthesia in pediatrics: an update.

AIM: Caudal anesthesia is one of the most used-popular regional blocks in children. This technique is a useful adjunct during general anesthesia and for providing postoperative analgesia after infraumbilical operations. The quality and level of the caudal blockade is dependent on the dose, volume, and concentration of the injected drug. Although it is a versatile block, one of the major limitations of the single-injection technique is the relatively short duration of postoperative analgesia. The most frequently used method to further prolong postoperative analgesia following caudal block is to add different adjunct drugs to the local anesthetics solution. Only few studies evaluated quality and duration of caudal block against the volume of the local anaesthetic applied. After reviewing recent scientific literature, the authors compare the duration of postoperative analgesia in children scheduled for hypospadia repair when 2two different volumes and concentrations of a fixed dose of ropivacaine are used. METHODS: After informed parental consent, 30 children (ASA I, 1-5 years old) were enrolled in a multicentre, perspective, not randomized, observational study conducted in two 2 children hospitals. After premedication with midazolam, anesthesia was induced with thiopental and maintained with sevoflurane in oxygen/air. After induction, patients received a caudal blockade either with ropivacaine 0.375% at 0.5 mL/kg (Low Volume High Concentration Group, LVHC; n = 15), or ropivacaine 0.1% at 1.8 mLl/kg (High Volume Low Concentration Group, HVLC; n = 15). Surgery was allowed to begin 10ten minutes after performing the block. MAC-hour was calculated. In the recovery room, pain was assessed using the Children's Hospital of Eastern Ontario Pain Scale (CHEOPS). In addition, the motor block was scored. After transferral to the ward, the patients were observed for 24 hours for signs of postoperative pain. The time period to first supplemental analgesic demand, i.e., from establishment of the block until the first registration of a CHEOPS score = or > 9, was considered the primary endpoint of the study. The time periods were compared using analysis of variance adjusted for age, weight and duration of surgical procedure as covariates. RESULTS: All patients were judged to have sufficient intraoperative analgesia, and none of them received additional analgesics intraoperatively. Patients' characteristics were similar, besides the age (32+/-10 vs 24 +/- 9 months; P < 0.05) and weigh (15.13 +/- 3.92 vs 11.93 +/- 1.83; P = 0.08). Analgesics were needed after 520 +/- 480 min in the LVHC and 952 +/- 506 min in the HVLC group (P < 0.05). Motor block was less in the HVLC group. CONCLUSIONS: In children undergoing hypospadia repair, caudal block with a ''high volume, low concentration'' regimen produces prolonged analgesia and less motor block, compared to a ''low volume, high concentration'' regimen.

Use of protein C concentrate in pediatric patients with sepsis.

AIM: Protein C (PC) is a plasma glycoprotein implicated in modulating coagulation and inflammation. Its levels decrease in sepsis and related diseases, where it has also proved to be a prognostic indicator of outcome. Infusion of exogenous PC, although not able to decrease mortality in severe sepsis and septic shock, can safely resolve the coagulation imbalances related to these pathological states. METHODS: A retrospective study was performed about utilisation of PC in severe sepsis and septic shock patients in three italian PICUs during a one-year period. Data from 29 patients were analysed. Age, PIM 2, mortality and length of stay were compared between treated and non treated patients. Treated patients were also analysed for PC dosage received, length of treatment, and modification of hemocoagulation parameters, before PC infusion and every 24 hours. RESULTS: In treated patients, the activity of PC, PT and PTT activity and fibrinogen improved significantly from basal to day 5 (p<0.05). Diminution of d-dimer was not quite significant (p=0.0514). Rise in platelets count and antithrombin III activity was not significant. No adverse reactions related to Protein C concentrate were observed. No difference in mortality was observed between the two groups. CONCLUSIONS: Although PC is included in guidelines for management of severe sepsis and septic shock, only 38%, of observed patients received PC treatment. Even in the treated group, patients received a lower dosage of PC, and for a shorter period, than recommended. In accordance to previous studies, we did not observe differences in mortality between treated and untreated patients. Our results showed a significant increase in plasma PC activity, following infusion of PC concentrate. This increase in PC appeared sufficient to restore some, but not all, of the abnormalities in the coagulation system. A large randomized, phase 3, placebo-controlled trial in children with severe sepsis and septic shock is advisable to establish effective role of therapy with PC in reducing mortality of these patients.

[Sedation with magnetic resonance imaging in pediatric patients]. / Tracheostomia in età pediatrica.

219 children (ASA I-II, age 30 days-12 yrs), underwent deep sedation with intravenous thiopental for magnetic resonance imaging in a hospital setting. Sedation strategies and monitoring are described. The procedure showed to be safe for the patients and cause low artefacts by movements.