Publications by authors named "Maria Teresa Dionísio"

3 Publications

  • Page 1 of 1

[Ultrasound Assessment of Ventilator-induced Diaphragmatic Dysfunction in Paediatrics].

Acta Med Port 2019 Aug 1;32(7-8):520-528. Epub 2019 Aug 1.

Serviço de Cuidados Intensivos Pediátricos. Hospital Pediátrico de Coimbra. Centro Hospitalar e Universitário de Coimbra. Coimbra. Portugal.

Introduction: Invasive mechanical ventilation contributes to ventilator-induced diaphragmatic dysfunction, delaying extubation and increasing mortality in adults. Despite the possibility of having a higher impact in paediatrics, this dysfunction is not routinely monitored. Diaphragm ultrasound has been proposed as a safe and non-invasive technique for this purpose. The aim of this study was to describe the evolution of diaphragmatic morphology and functional measurements by ultrasound in ventilated children.

Material And Methods: Prospective exploratory study. Children admitted to Paediatric Intensive Care Unit requiring mechanical ventilation > 48 hours were included. The diaphragmatic thickness, excursion and the thickening fraction were assessed by ultrasound.

Results: Seventeen cases were included, with a median age of 42 months. Ten were male, seven had comorbidities and three in seventeen had malnutrition at admission. The median time under mechanical ventilation was seven days. The median of the initial and minimum diaphragmatic thickness was 2.3 mm and 1.9 mm, respectively, with a median decrease in thickness of 13% under pressure-regulated volume control. Diaphragmatic atrophy was observed in 14/17 cases. Differences in the median thickness variation were found between patients with sepsis and without (0.70 vs 0.25 mm; p = 0.019). During pressure support ventilation there was a tendency to increase diaphragmatic thickness and excursion. Extubation failure occurred for diaphragmatic thickening fraction ≤ 35%.

Discussion: Under pressure-regulated volume control there was a tendency for a decrease in diaphragmatic thickness. In the pre-extubation stage under pressure support, there was a tendency for it to increase. These results suggest that, by titrating ventilation using physiological levels of inspiratory effort, we can reduce the diaphragmatic morphological changes associated with ventilation.

Conclusion: The early recognition of diaphragmatic changes may encourage a targeted approach, namely titration of ventilation, in order to reduce ventilator-induced diaphragmatic dysfunction and its clinical repercussions.
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August 2019

[Paediatric visceral leishmaniasis: experience of a paediatric referral center 1990-2009].

Acta Med Port 2011 May-Jun;24(3):399-404. Epub 2011 Aug 12.

Serviços de Cardiologia Pediátrica e de Pediatria. Hospital Pediátrico de Coimbra, Coimbra.

Introduction: Visceral Leishmaniasis (VL) is a systemic infection, endemic in many parts of the world, including Portugal. The aim is to review all cases of VL admitted to our hospital.

Patients And Methods: Retrospective analysis of all cases of VL admitted to a Level III Paediatric Hospital, between January 1990 and December 2009 (20 years). Demographic, epidemiological, clinical, laboratorial, therapeutic and follow-up data were analysed.

Results: During the study period, 54 children were admitted with VL, three of which were excluded from the study due to incomplete clinical records. The mean age was 27 months (seven months - twelve years) and 53% were female. Two thirds of the cases were diagnosed during Spring and Summer. The mean time for diagnosis was 31 days (2-188 days). The most common clinical findings were splenomegaly (100%), fever (96%), pallor (90%) and hepatomegaly (82%). Bone marrow aspiration was performed in all children, with amastigotes identified in 73% of the cases. Indirect immunofluorescence was performed in 30 cases, being positive in 29 (97%). All were treated with meglumine antimoniate. Three children relapsed during the first year after the initial episode. A 17 months-old child died due to cardiac failure.

Conclusions: The early diagnosis of VL is essential to carry out prompt management and prevent potential fatal complications. In our analysis, the management with meglumine antimoniate resulted in an overall favourable outcome.
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February 2012

Descending necrotizing mediastinitis presenting as cardiac tamponade.

Rev Port Cardiol 2011 Feb;30(2):243-8

Serviço de Cardiologia Pediátrica do Hospital Pediátrico de Coimbra, Coimbra, Portugal.

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February 2011