Objectives A large percentage of children with autism spectrum disorders (ASD) have bedtime and sleep disturbances. However, the treatment of these disturbances has been understudied. The purpose of our study was to develop a manualized behavioral parent training (BPT) program for parents of young children with ASD and sleep disturbances and to test the feasibility, fidelity, and initial efficacy of the treatment in a small randomized controlled trial (RCT). Participants and methods Parents of a sample of 40 young children diagnosed with ASD with an average age of 3.5 years were enrolled in our study. Participants were randomized to either the BPT program group or a comparison group who were given nonsleep-related parent education. Each was individually administered a 5-session program delivered over the 8-week study. Outcome measures of feasibility, fidelity, and efficacy were collected at weeks 4 and 8 after the baseline time point. Children’s sleep was assessed by parent report and objectively by actigraphy. Results Of the 20 participants in each group, data were available for 15 participants randomized to BPT and 18 participants randomized to the comparison condition. Results supported the feasibility of the manualized parent training program and the comparison program. Treatment fidelity was high for both groups. The BPT program group significantly improved more than the comparison group based on the primary sleep outcome of parent report. There were no objective changes in sleep detected by actigraphy. Conclusions Our study is one of few RCTs of a BPT program to specifically target sleep disturbances in a well-characterized sample of young children with ASD and to demonstrate the feasibility of the approach. Initial efficacy favored the BPT program over the comparison group and suggested that this manualized parent training approach is worthy of further examination of the efficacy within a larger RCT.

Many medical conditions are characterized by undesired or pathological peripheral neurological activity. The local delivery of high-frequency alternating currents (HFAC) has been shown to be a fast acting and quickly reversible method of blocking neural conduction and may provide a treatment alternative for eliminating pathological neural activity in these conditions. This work represents the first formal study of electrode design for high-frequency nerve block, and demonstrates that the interpolar separation distance for a bipolar electrode influences the current amplitudes required to achieve conduction block in both computer simulations and mammalian whole nerve experiments. The minimal current required to achieve block is also dependent on the diameter of the fibers being blocked and the electrode–fiber distance. Single fiber simulations suggest that minimizing the block threshold can be achieved by maximizing both the bipolar activating function (by adjusting the bipolar electrode contact separation distance) and a synergistic addition of membrane sodium currents generated by each of the two bipolar electrode contacts. For a rat sciatic nerve, 1.0–2.0 mm represented the optimal interpolar distance for minimizing current delivery.

In this large ICU population, intensive monitoring of UO was associated with improved detection of AKI and reduced 30-day mortality in patients experiencing AKI, as well as less fluid overload for all patients. Our results should help inform clinical decisions and ICU policy about frequency of monitoring of UO, especially for patients at high risk of AKI or fluid overload, or both.

This study investigates a novel technique for blocking a nerve using a combination of direct and high frequency alternating currents (HFAC). HFAC can produce a fast acting and reversible conduction block, but cause intense firing at the onset of current delivery. We hypothesized that a direct current (DC) block could be used for a very brief period in combination with HFAC to block the onset firing, and thus establish a nerve conduction block which does not transmit onset response firing to an end organ. Experiments were performed in rats to evaluate (1) nerve response to anodic and cathodic DC of various amplitudes, (2) degree of nerve activation to ramped DC, (3) a method of blocking onset firing generated by high frequency block with DC, and (4) prolonged non-electrical conduction failure caused by DC delivery. The results showed that cathodic currents produced complete block of the sciatic nerve with a mean block threshold amplitude of 1.73 mA. Ramped DC waveforms allowed for conduction block without nerve activation; however, down ramps were more reliable than up ramps. The degree of nerve activity was found to have a non-monotonic relationship with up ramp time. Block of the onset response resulting from 40 kHz current using DC was achieved in each of the six animals in which it was attempted; however, DC was found to produce a prolonged conduction failure that likely resulted from nerve damage.

Objective We sought to investigate if the chloride content of fluids used in resuscitation was associated with short and long-term outcomes. Design We identified patients who received large volume fluid resuscitation (LVR), defined as greater than 60ml/kg over a 24 hour period. Chloride load was determined for each patient based on the chloride ion concentration of the fluids they received during LVR multiplied by the volume of fluids. We compared the development of hyperchloremic acidosis (HCA), AKI and survival among those with higher and lower chloride loads. Setting University Medical Center Patients Patients admitted to intensive care units (ICUs) from 2000–2008 Interventions None Main Results Among 4,710 patients receiving LVR HCA was documented in 523 (11%). Crude rates of HCA, AKI and hospital mortality all increased significantly as chloride load increased (p<0.001). However, chloride load was no longer associated with HCA or AKI after controlling for total fluids, age, and baseline severity. Conversely, each 100 mEq increase in chloride load was associated with a 5.5% increase in the hazard of death even after controlling for total fluid volume, age and severity (p=0.0015) over one year. Conclusions Chloride load is associated with significant adverse effects on survival out to one year even after controlling for total fluid load, age and baseline severity of illness. However the relationship between chloride load and development of HCA or AKI is less clear and further research is needed to elucidate the mechanisms underlying the adverse effects of chloride load on survival.

Many diseases are characterized by undesired or pathological neural activity. The local delivery of high frequency currents has been shown to be an effective method for blocking neural conduction in peripheral nerves and may provide a therapy for these conditions. To date, all studies of high frequency conduction block have utilized extraneural (cuff) electrodes to achieve conduction block. In this study we show that high frequency conduction block is feasible using intrafascicular electrodes.

Background and purpose The purpose of this study was to compare two parent completed questionnaires, the Modified Simonds & Parraga Sleep Questionnaire (MSPSQ), and the Children’s Sleep Habits Questionnaire (CSHQ), used to characterize sleep disturbances in young children with autism spectrum disorders (ASD). Both questionnaires have been used in previous work in the assessment and treatment of children with ASD and sleep disturbance. Participants and methods Parents/caregivers of a sample of 124 children diagnosed with ASD with an average age of six years completed both sleep questionnaires regarding children’s sleep behaviors. Internal consistency of the items for both measures was evaluated as well as the correlation between the two sleep measures. A Receiver Operating Characteristics (ROC) curve analysis was also conducted to examine the predictive power of the MSPSQ. Results More than three quarters of the sample (78%) were identified as poor sleepers on the CSHQ. Cronbach’s alpha for the items on the CSHQ was 0.68 and Cronbach’s alpha for items on the MSPSQ was 0.67. The total scores for MSPSQ and CSHQ were significantly correlated (r =.70, p<.01). After first identifying the poor sleepers based on the CSHQ, an area under the curve was 0.89 for the MSPSQ. Using a cut off score of 56 on the MSPSQ, sensitivity was .86 and specificity was .70. Conclusions In this sample of children with ASD, sleep disturbances were common across all cognitive levels. Preliminary findings suggest that, similar to the CSHQ, the MSPSQ has adequate internal consistency. The two measures were also highly correlated. A preliminary cut off of 56 on the MSPSQ offers high sensitivity and specificity commensurate with the widely used CSHQ.

CLD patients have a high incidence of AKI. Compared with creatinine criteria alone, incorporating UO into the diagnostic criteria increased the measured incidence of AKI. Stage 2-3 AKI-UO has a high negative impact on hospital mortality. (Hepatology 2017;66:1592-1600).