Evidence map›Paper›PMID 34439590›Full record

ArticleBrain sciences2021

Intracranial Compliance Assessed by Intracranial Pressure Pulse Waveform.

Sérgio Brasil, Davi Jorge Fontoura Solla, Ricardo de Carvalho Nogueira, Manoel Jacobsen Teixeira, Luiz Marcelo Sá Malbouisson, Wellingson Silva Paiva

Abstract read
In one paragraph

Article in Brain sciences, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

39 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  5. Impaired Intracranial Compliance: A New Hypertension-Mediated Brain Organ Damage?High blood pressure & cardiovascular prevention : the official journal of the Italian Society of Hypertension · 2026
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  8. Observational
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  20. Evolving concepts in intracranial pressure monitoring - from traditional monitoring to precision medicine.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2025
    Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Sérgio BrasilDepartment of Neurology, School of Medicine, University of São Paulo, São Paulo 05508-070, Brazil.ORCID 0000-0003-2397-9947
Davi Jorge Fontoura SollaDepartment of Neurology, School of Medicine, University of São Paulo, São Paulo 05508-070, Brazil.
Ricardo de Carvalho NogueiraDepartment of Neurology, School of Medicine, University of São Paulo, São Paulo 05508-070, Brazil.
Manoel Jacobsen TeixeiraDepartment of Neurology, School of Medicine, University of São Paulo, São Paulo 05508-070, Brazil.ORCID 0000-0002-7974-6045
Luiz Marcelo Sá MalbouissonDepartment of Intensive Care, School of Medicine, University of São Paulo, São Paulo 05508-070, Brazil.
Wellingson Silva PaivaDepartment of Neurology, School of Medicine, University of São Paulo, São Paulo 05508-070, Brazil.ORCID 0000-0002-5165-7040

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMorphological alterations in intracranial pressure (ICP) pulse waveform (ICPW) secondary to intracranial hypertension (ICP >20 mmHg) and a reduction in intracranial compliance (ICC) are well known indicators of neurological severity. The exclusive exploration of modifications in ICPW after either the loss of skull integrity or surgical procedures for intracranial hypertension resolution is not a common approach studied. The present study aimed to assess the morphological alterations in ICPW among neurocritical care patients with skull defects and decompressive craniectomy (DC) by comparing the variations in ICPW features according to elevations in mean ICP values.

methodsPatients requiring ICP monitoring because of acute brain injury were included. A continuous record of 10 min-length for the beat-by-beat analysis of ICPW was performed, with ICP elevation produced by means of ultrasound-guided manual internal jugular vein compression at the end of the record. ICPW features (peak amplitude ratio (P2/P1), time interval to pulse peak (TTP) and pulse amplitude) were counterweighed between baseline and compression periods. Results were distributed for three groups: intact skull (exclusive burr hole for ICP monitoring), craniotomy/large fractures (group 2) or DC (group 3).

results57 patients were analyzed. A total of 21 (36%) presented no skull defects, 21 (36%) belonged to group 2, whereas 15 (26%) had DC. ICP was not significantly different between groups: ±15.11 for intact, 15.33 for group 2 and ±20.81 mmHg for group 3, with ICP-induced elevation also similar between groups (

conclusionIn the present study, intracranial pressure pulse waveform analysis indicated that intracranial compliance was significantly more impaired among decompressive craniectomy patients, although ICPW indicated DC to be protective for further influences of ICP elevations over the brain. The analysis of ICPW seems to be an alternative to real-time ICC assessment.

Indexed as

acute brain damagedecompressive craniectomyintracranial complianceintracranial pressure

Identifiers

PMID34439590
PMCPMC8392489

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.