WorldCat Identities

Valero, Ricard

Overview
Works: 13 works in 22 publications in 3 languages and 25 library holdings
Roles: Author, Other, Contributor, Publishing director
Publication Timeline
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Most widely held works by Ricard Valero
TRANSPLANT COORDINATION MANUAL by VALERO RICARD( Book )

4 editions published between 2007 and 2015 in English and held by 4 WorldCat member libraries worldwide

Donants d'òrgans a cor parat recirculació normotèrmica i refredament corporal amb derivació cardiopulmonar com a mètode d'obtenció d'òrgans : estudi clínic i experimental by Ricard Valero i Castell( )

5 editions published between 2000 and 2020 in Catalan and Spanish and held by 4 WorldCat member libraries worldwide

"Els donants a cor parat (OCP) són aquells que es troben en procés d'aturada cardiorespiratòria irrecuperable, amb un temps d'isquèmia calenta suficientment reduït que permeti l'extracció d'òrgans i teixits aptes per a trasplantament. Entenem per temps d'isquèmia calenta el temps transcorregut des del moment de l'aturada cardiocirculatòria fins a Ia perfusió de l'òrgan. El procediment d'obtenció d'òrgans OCP s'inicia un cop diagnosticada Ia mort per aturada cardiorespiratòria, moment en el qual es considera el cadàver com a donant potencial. Aleshores es valora el temps d 'isquèmia calenta i es du a terme Ia cateterització de l'artèria i vena femoral per poder iniciar Ia preservació dels òrgans. En el cas concret dels ronyons, originalment la perfusió s'assolia mitjançant la injecció de líquid fred a travès de l'artèria femoral (perfusió in situ), amb l'objectiu de disminuir-ne ràpidament Ia temperatura i limitar el metabolisme cel·lular i el dany provocat per Ia isquèmia calenta. Posteriorment s'han anat dissenyant tècniques per a Ia perfusió dels òrgans de DCP amb sistemes de derivació cardiopulmonar. S'ha assajat favorablement un procediment consistent en el refredament corporal amb circulació extracorpòria, que entre d'altres avantatges permet una hipotèrmia més suau i progressiva, amb una pressió de perfusió més elevada, cosa que és important per poder valorar la viabilitat de l'ús dels òrgans obtinguts per a trasplantaments. Per altra banda, el problema més important per Ia utilització dels òrgans de DCP és una major incidència de retard del funcionament i de fallada primària de l'empelt. En el cas del trasplantment renal, la disfunció inicial pot ser substituïda per Ia diàlisi fins que l'òrgan o bé recupera Ia funció o bé es practica un altre trasplantament. Per contra,el trasplantarnent hepàtic ha d'assegurar de manera immediata Ia funcionalitat de l'òrgan, perquè no es disposa de cap teràpia substitutiva. Es per això que els estudis que s'estan realitzant actualment van adreçats a valorar Ia viabilitat del fetge abans del trasplantament i a millorar-ne Ia funció mitjançant Ia modificació de les tècniques d'obtenció i preservació dels empelts fins al trasplantament." -- TDX
Estètica Miró by Ricard Valero( Book )

2 editions published in 2003 in Spanish and Catalan and held by 3 WorldCat member libraries worldwide

Manual de coordinación de trasplantes( Book )

2 editions published in 2005 in Spanish and held by 2 WorldCat member libraries worldwide

Preoperative bedside ultrasound assessment of gastric volume and evaluation of predisposing factors for delayed gastric emptying: a case-control observational study by Helena Valero Castañer( )

1 edition published in 2020 in English and held by 2 WorldCat member libraries worldwide

Long-term outcomes of endoscopic endonasal approach for skull base surgery: a prospective study by Elena Rioja( )

1 edition published in 2015 in English and held by 2 WorldCat member libraries worldwide

A randomized comparison of the Ambu AuraGain versus the LMA supreme in patients undergoing gynaecologic laparoscopic surgery by Ana M Lopez( )

1 edition published in 2016 in English and held by 2 WorldCat member libraries worldwide

Trasplante hepático experimental en el cerdo con donante a corazón parado by Pilar Santos Cidón( )

1 edition published in 2009 in Spanish and held by 1 WorldCat member library worldwide

Developing standardised advanced training in neuroanaesthesia( )

1 edition published in 2017 in English and held by 1 WorldCat member library worldwide

Advanced multimodal neuromonitoring : applicability for the pathophysiological study of intracranial pressure plateau waves by Nicolás Gonzalo De Riva Solla( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

INTRODUCTION Multimodal neuromonitoring increases the knowledge of the physiopathology underlying the pathological slow vasogenic waves known as ‘plateau waves' of intracranial pressure (ICP). The transcranial Doppler (TCD) pulsatility index (PI) describes changes in the morphology of the blood flow velocity (FV) waveform and is classically consider a descriptor of the distal cerebrovascular resistance (CVR). Critical closing pressure (CCP) or zero-flow pressure denotes a threshold of arterial blood pressure (ABP) at which small cerebral vessels collapse and cerebral blood flow (CBF) ceases increasing the ischemic risk. The difference between CCP and ICP is explained by the tone of the small cerebral vessels, so-called wall tension (WT). Although it has inspired theoretical interest, its clinical applicability is limited for methodological reasons. HYPOTHESIS 1) PI is a complex function determined by the interaction of multiple haemodynamic variables, and is not solely determined by distal CVR; 2) CCP and WT estimated with a cerebrovascular impedance model, could accurately define the pathophysiological changes during plateau waves. AIMS 1) to clarify the relationship between PI and CVR; to define which factors truly influence PI; 2) to calculate CCP and arterial WT with a novel multiparametric mathematical model in order to examine the proposed vasodilatory pathophysiology of plateau waves; to evaluate its possible clinical appliance. SUBJECTS AND METHODS Recordings from patients with severe head-injury undergoing monitoring of ABP, ICP, cerebral perfusion pressure (CPP), and TCD assessed CBF velocities (FV) were analysed. The Gosling PI was compared between baseline and ICP plateau waves (n = 20 patients) or short-term (30–60 min) hypocapnia (n = 31). In addition, a modeling study was conducted with the ‘‘spectral'' PI (calculated using fundamental harmonic of FV) resulting in a theoretical formula expressing the dependence of PI on balance of cerebrovascular impedances. Multimodality neuromonitoring integrated with bio-informatics analysis (ICM+™ Software, www.neurosurg.cam.ac.uk/icmplus). Both studies are based in a multiparametric method new model of cerebrovascular impedance; first a retrospective study of 2 opposing physiological conditions comparing basal PI to: a) plateau waves (n= 20 patients, 38 plateau waves); and b) moderate hyperventilation (n=31); next CCP was calculated in the plateau waves group (n= 20). According to Burton's model, wall tension was estimated as: WT = CCP-ICP. RESULTS 1) PI increased significantly (p< 0.001) while CVR decreased (p< 0.001) during plateau waves. During hypocapnia both PI and CVR increased (p< 0.001). The modeling formula explained more than 65 % of the variability of Gosling PI and 90% of the variability of the ‘spectral' PI (R=0.81 and R=0.95, respectively); 2) During the vasodilatory loop of the plateau waves, there is a rise in CCP and reduction in WT (both significant, p < 0.001). Change in CCP was correlated to ICP changes (R=0.80, p<0.001). Cerebral arterial WT decrement (a 34.3%) confirms its vasodilatatory origin. However, the effect of rising ICP is more pronounced than the corresponding vasodilatatory response decreasing WT. All results were significant with both traditional and multi-parameter methods of calculation. The "safety collapsing margin" (ABP-CCP) decreased significantly (p < 0.001) from baseline ICP to plateau levels, indicating that the probability for brain vessels to collapse. CONCLUSIONS 1) TCD- PI is usually misinterpreted as a descriptor of distal CVR. The presented mathematical model describes PI as a product of the interplay between CPP, the fundamental harmonic of ABP, CVR, compliance of the cerebral arterial bed and the heart rate; 2) During plateau waves, CCP increases significantly while active vasomotor tone, represented by WT, decreases due to vasodilation. A new mathematical model to estimate CCP based on the impedance methodology disallows non-physiologic negative values and provides a more physiological interpretation. -- TDX
ProSeal Laryngeal Mask Airway Attenuates Systemic and Cerebral Hemodynamic Response During Awakening of Neurosurgical Patients( )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

Abstract : Background: Extubation and emergence from anesthesia may lead to systemic and cerebral hemodynamic changes that endanger neurosurgical patients. We aimed to compare systemic and cerebral hemodynamic variables and cough incidence in neurosurgery patients emerging from general anesthesia with the standard procedure (endotracheal tube [ETT] extubation) or after replacement of the ETT with a laryngeal mask airway (LMA). Materials and Methods: Forty-two patients undergoing supratentorial craniotomy under general anesthesia were included in a randomized open-label parallel trial. Patients were randomized (sealed envelopes labeled with software-generated randomized numbers) to awaken with the ETT in place or after its replacement with a ProSeal LMA. We recorded mean arterial pressure as the primary endpoint and heart rate, middle cerebral artery flow velocity, regional cerebral oxygen saturation, norepinephrine plasma concentrations, and coughing. Results: No differences were found between groups at baseline. All hemodynamic variables increased significantly from baseline in both groups during emergence. The ETT group had significantly higher mean arterial pressure (11.9 mm Hg; 95% confidence interval [CI], 2.1-21.8 mm Hg) (P =0.017), heart rate (7.2 beats/min; 95% CI, 0.7-13.7 beats/min) (P =0.03), and rate-pressure product (1045.4; 95% CI, 440.8-1650) (P =0.001). Antihypertensive medication was administered to more ETT-group patients than LMA-group patients (9 [42.9%] vs. 3 [14.3%] patients, respectively; P =0.04). The percent increase in regional cerebral oxygen saturation was greater in the ETT group by 26.1% (95% CI, 9.1%-43.2%) (P =0.002), but no between-group differences were found in MCA flow velocity. Norepinephrine plasma concentrations rose in both groups between baseline and the end of emergence: LMA: from 87.5±7.1 to 125.6±17.3 pg/mL; and ETT: from 118.1±14.1 to 158.1±24.7 pg/mL (P =0.007). The differences between groups were not significant. The incidence of cough was higher in the ETT group (87.5%) than in the LMA group (9.5%) (P <0.001). Conclusions: Replacing the ETT with the LMA before neurosurgical patients emerge from anesthesia results in a more favorable hemodynamic profile, less cerebral hyperemia, and a lower incidence of cough
 
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Alternative Names
Ricard Valero wetenschapper

Valero i Castell, Ricard

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