Low-Cost Robotic Assessment of Visuo-Motor Deficits in Alzheimer's Disease

A low-cost robotic interface was used to assess the visuo-motor performance of patients with Alzheimer's disease (AD). Twenty AD patients and twenty age-matched controls participated in this work. The battery of tests included simple reaction times, position tracking, and stabilization tasks performed with both hands. The regularity, velocity, visual and haptic feedback were manipulated to vary movement complexity. Reaction times and movement tracking error were analyzed. Results show a marked group effect on a subset of conditions, in particular when the patients could not rely on the visual feedback of hand movement. The visuo-motor performance correlated with the measures of global cognitive functioning and with different memory-related abilities. Our results support the hypothesis that the ability to recall and use visuo-spatial associations might underlie the impairment in complex motor behavior that has been reported in AD patients. Importantly, the patients had preserved learning effects across sessions, which might relate to visuo-motor deficits being less evident in every-day life and clinical assessments. This robotic assessment, lasting less than 1 h, provides detailed information about the integrity of visuo-motor abilities. The data can aid the understanding of the complex pattern of deficits that characterizes this pervasive disease.

ViibraTip for Testing Vibration Perception to Detect Diabetic Peripheral Neuropathy: A NICE Medical Technology Guidance

VibraTip™ was selected by the Medical Technologies Advisory Committee (MTAC) to undergo evaluation through the National Institute for Health and Care Excellence (NICE). VibraTip™ provides a vibratory stimulus for the purpose of detecting diabetic peripheral neuropathy (DPN) in patients with type 1 or 2 diabetes mellitus, and is intended to replace the current practice of using the 128 Hz tuning fork or 10 g monofilament (comparators). The sponsor (McCallan Medical) provided clinical and economic submissions which were evaluated by an External Assessment Centre (EAC). Of six diagnostic studies identified, the EAC considered that only one was directly relevant to the assessment. This study indicated VibraTip™ had a sensitivity of 0.79 (95 % CI 0.69-0.90) and specificity of 0.82 (95 % CI 0.74-0.90) for DPN using a neurothesiometer at 25 V as a reference standard. This was non-inferior to the comparators, but the sample size (n = 141) was too small to draw unequivocal conclusions and it is unclear how generalisable results were to clinical practice. The sponsor presented a de facto cost-minimisation model that in the base case showed minimal cost savings and, in sensitivity analysis which assumed diagnostic superiority of VibraTip™, showed large savings. The EAC appraised this model and concluded it was flawed as it was not evidence based and costs were likely to be unrealistic. The MTAC considered that the technology showed promise but decided the case for adoption was not proven, and therefore made a research recommendation as is reflected in NICE Medical Technology Guidance 22.

Kathleen Mears Memorial Lecture: personal accountability: your key to survival in health care reform

Over the past thirty years the rising cost of healthcare has produced changes in reimbursement strategies. Continually, pressures are placed on the practitioners to reduce the length of the patient hospital stay and provide services in a high quality, risk free, cost effective manner. Following the implementation of diagnostic related groups (DRGs) in the 1980s and Managed Care in the 1990s we are now faced with embracing and surviving the Affordable Health Care Act-H.R.3590 (HHS 2013) that is linking reimbursement to quality outcomes. In short, financial constraints in the funding of health care will once more alter the patterns of delivery and challenge the practitioners to maintain superior care. As Neurodiagnostic Professionals this new reform offers another opportunity to review our process of care and the Neurodiagnostic labs role in the delivery of healthcare. For success, close examination of routine workflows, recognizing and solving existing delivery limitations, developing team care coordination, and increasing the neurodiagnostic professionals profile within the work environment will be required. Embracing your role in this overall process will most likely demand more paperwork, changing protocols, learning and implementing new policies, accepting new work schedules, implementing new quality standards, and pursuing additional education or credentials. Unlike never before more emphasis will be placed on measuring and reporting on the quality of the care we deliver in our labs, intensive care units, and operating rooms.

[Economical basis for neurologic services and the system for health insurance: diagnosis procedure combinations and insurance scores of neurophysiological tests]

The Social Insurance Union of Societies Related to Internal Medicine and the Social Insurance Union of Societies Related to Surgical Medicine have pushed for revisions of the medical service fee against the Medical Economics Division of Insurance Department, Ministry of Health, Labor and Welfare. About neurological diseases, Japanese Society of Neurology, Japanese Society of Neurological Therapeutics, Japanese Society of Clinical Neurolphysiology, and Japanese Society of Child Neurology are involved in this movement. The examination fee of the electrical encephalography and the nerve conduction study was accepted. I review the process of the comprehensive medicine, and the revision of DPC (Diagnosis Procedure Combination) and medical service fee.

Cost assessment of headache in childhood and adolescence: preliminary data

Headache, and in particular migraine, is a common disturbance in childhood and adolescence. The disabling nature of headache, evident in the adult, together with its effects on family life and reduction in performance of scholastic activity, make it a disease with an elevated social economic impact. We present preliminary results of a prospective study conducted over 6 months on a population of headache sufferers in childhood and adolescence who referred to our Juvenile Neuropsychiatry Centre of the Hospital of Perugia. Our objective was to quantify the direct and indirect costs associated with juvenile headache.

The role of neuroimaging in dementia

Potential new therapies for the treatment of Alzheimer's disease demand early and accurate diagnosis. Although clinical evaluation is generally sufficient when the disease is well established, neuroimaging tools are helpful to detect the earliest changes of Alzheimer's disease or differentiate Alzheimer's disease from the other forms of dementia. This article reviews the basic concepts of brain imaging and clinical application. It concludes with a brief discussion of future directions in neuroimaging for the diagnosis and longitudinal follow-up of Alzheimer's disease.

How often does routine pediatric EEG have an important unexpected result?

BACKGROUND

Electroencephalogram recordings are requested for the assessment of many childhood disorders. To assess the utility of the EEG in children, we studied how often routine EEG results can be correctly predicted from the EEG requisition.

METHOD

Five hundred consecutive initial EEG requests from the IWK Grace Health Centre from two time epochs were examined. All EEGs were 16 channel (10-20 electrode system). Based only on the requisition (patient demographics, referring physician, and reason for EEG), we coded our prediction of the result and then the actual result. When results were discordant from prediction, a judgment was made about the potential importance of the result.

RESULTS

Overall, EEG results were correctly predicted in 81%. Prediction for all nonepilepsy reasons was accurate in 91% (n=320) and 96% for paroxysmal nonepileptic events (n=158) but only 59% for epileptic disorders (n=141) (p<0.0001). Neurologists ordered 45% of EEGs, pediatricians 32%, and GP's 17%. Predictions were least accurate for neurologists' requests (p<0.006) however, neurologists were more likely to request EEG for epileptic disorders (p<0.0001). Age of the child and urban versus rural address did not affect the accuracy of prediction.

CONCLUSION

Results of routine pediatric EEG for most nonepilepsy reasons appear highly predictable and therefore, possibly of little value to an experienced clinician. When requested for epilepsy, this "ancient" test remains full of surprises.

Dementia diagnostic guidelines: methodologies, results, and implementation costs

OBJECTIVE

To facilitate the diagnostic process for dementia. Five guidelines and four consensus statements on specific diagnostic recommendations, specialist referral recommendations, and costs of recommended diagnostic procedures were compared and summarized.

DATA SOURCES AND SELECTION

A MEDLINE search from 1984 to 1999 and queries to experts yielded 14 guidelines and consensus statements that addressed the diagnosis of dementia. Only nine documents which had national or international scopes were reviewed.

METHODS

Comparisons were made on the specific diagnostic criteria for patient history, clinical examination, functional assessment, laboratory tests, neuroimaging, and other diagnostic tests, as well as specialist referral recommendations and costs for the recommended diagnostic procedures. The first three authors reviewed independently each document and completed a table on specific recommendations in each document. To settle disagreements about specific recommendations, they discussed them until they reached a consensus. To interpret the intent of vague statements, they used their best judgment.

RESULTS

The documents differed in content, recommendations, and development methodology. They were based on either expert opinion or scientific evidence, or both. Although the nine documents were nearly unanimous in several recommendations, including assessing the presenting problem, taking a medical history, conducting physical and neurological examinations, and assessing the patient's mental and cognitive status, considerable differences in recommendations were common. Such differences led to large differentials in the estimated costs (range, $190 to $2,001) for recommended diagnostic assessments.

CONCLUSIONS

A systematic approach to diagnostic recommendations for dementia may induce greater consistency among guidelines and consensus statements. The current approach leads to considerable variability in recommendations and estimated costs.

Improved health care resource utilization following video-EEG-confirmed diagnosis of nonepileptic psychogenic seizures

The economic burden of epilepsy is well recognized. However, empirical investigation establishing costs associated with the diagnosis and treatment of non-epileptic psychogenic seizures (NEPS) is lacking. We studied 20 patients with video/EEG monitoring-confirmed NEPS to determine the effect of definitive diagnosis and treatment on medical costs and utilization. A medical resource utilization questionnaire and inpatient medical chart review were employed to calculate utilization information. Medication usage, outpatient visits, emergency room admissions, and diagnostic testing over a 6-month pre-diagnosis and a 6-month post-diagnosis period were compared. There was an 84% average reduction in total seizure-related medical charges in the 6 months following NEPS diagnosis. Average diagnostic testing charges declined 76%, average medication charges decreased 69%, outpatient clinic visits declined 80%, and emergency room visits reduced by 97%. A majority of patients obtaining a definitive inpatient video/EEG-seizure-monitoring-confirmed NEPS diagnosis experience substantial reductions in health care utilization and dollar costs.