Prognostic value of the pulse pressure amplitudes, time to reach the plateau and the slope obtained in the lumbar infusion test for the study of idiophatic normal pressure hydrocephalus
| Autor: | Juan Carlos Roa Montes de Oca, Pablo Sousa Casasnovas, Alejandra Garrido Ruiz, Daniel Ángel Arandia Guzmán, Andoni García Martín, Álvaro Otero Rodríguez, Luis Torres Carretero |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
medicine.medical_specialty
Infusion test Intracranial Pressure business.industry Blood Pressure General Medicine medicine.disease Plateau (mathematics) Prognosis Adenosine Monophosphate Hydrocephalus Normal Pressure Pulse pressure Amplitude Lumbar Cerebrospinal fluid Normal pressure hydrocephalus Internal medicine Cardiology Medicine Humans business Shunt (electrical) Retrospective Studies |
| Zdroj: | Neurocirugia (English Edition). |
| ISSN: | 2529-8496 |
| Popis: | Background and objective To study the prognostic value of the resistance to the cerebrospinal fluid outflow (Rout) obtained in the lumbar infusion test in idiopathic normal pressure hydrocephalus (iNPH), as well as the pulse pressure amplitudes in the different periods of the test and other new variables extracted by Neuropicture® software. Material and methods Patients with ‘probable iNPH’ who underwent a lumbar infusion test were retrospectively revised. The positive predictive values (PPV) of the cutoff point of the best prognostic accuracy of the Rout, the basal pulse pressure amplitude (AMPo), the pulse pressure amplitude during the first 10 min (AMP10min), the plateau pulse pressure amplitude (AMPmes), the Rout pulse pressure amplitude (AMPRout), the time to reach the plateau (T), and the slope until reaching the plateau were determined. Patients were categorized either as responders or non-responders. Results The study included 64 responders patients and 16 non-responders patients. The PPV of Rout > 15 mmHg/mL/min was 91.7%; AMPo > 2.34 mmHg: 91.3%; AMP10 min > 4.34 mmHg: 83.3%; AMPmes > 12.44 mmHg: 84.6%; AMPRout > 6.34 mmHg: 85%; T 0.040 mmHg/s: 96.3%. Conclusions Rout is a valid criterion to indicate a ventricular shunt. Pulse pressure amplitudes in the different periods of the lumbar infusion test, in addition to T and P, are other variables whose positivity is indicative of shunt response and should be considered in the diagnostic protocol of the iNPH. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect