Ana Rivas-Paterna

Dr. Ana Rivas-Paterna

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Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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4 May 2023 in Heliyon
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Journal Article
Open access
TLTrinidad Díaz Luengo
Trinidad Díaz Luengo
ARAna Rivas-Paterna
Ana Rivas-Paterna
ELElena Loureido
Elena Loureido
ECEmilio Vargas Castrillón
Emilio Vargas Castrillón
To investigate preoperative anxiety in parents of paediatric surgical patients, testing whether the provision of information (using video and story books) regarding the surgical process can impact on reducing anxiety. Analyse if any personal factors influence the reduction of anxiety. Attending a surgical theatre generates anxiety, especially in the case of children. The effect of different preoperative intervention procedures in children that attempt to reduce their anxiety level have been studied a great deal. However, although their parents also suffer high levels of anxiety, potential intervention to reduce their levels has not received the same attention. Randomised Clinical trial. One hundred and twenty-five parents of children (8–12 y.o.) undergoing surgery in a public hospital were randomly assigned to the control group CG (34 individuals) or one of the 3 experimental groups EG (91). In this Randomised Controlled Study, children and parents of the experimental groups were provided with a story book, a video with additional information of nursing, or both. Prior to the surgical intervention, the State Anxiety, S-A, and Trait Anxiety, T-A, of the parents and children were measured using the STAI and STAIC questionnaires respectively. Data collection was carried out for 12 months starting in October 2016. Parents' S-A in the control group was higher than in the experimental groups. A linear model explains the parents’ S-A using as regressors: children S-A, age and T-A of the parents, and children age. Providing information about the surgical process (through stories or videos) to which a child is going to be subjected can reduce the anxiety of the parents. Given their close connection to the patient and the potential effects on the children of their psychological situation, healthcare professionals should consider paying greater attention to communicating with the parents.

20 October 2022 in Nursing Open
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Journal Article
Open access
AMAlfonso Meneses-Monroy
Alfonso Meneses-Monroy
ARAna Rivas-Paterna
Ana Rivas-Paterna
EOElena Orgaz‐Rivas
Elena Orgaz‐Rivas
FGFrancisco J. García‐González
Francisco J. García‐González
MGMaría J. González‐Sanavia
María J. González‐Sanavia
EPE Pacheco
E Pacheco
Aim: To evaluate the impact of an educational intervention focused on teaching students to create infographics to improve pharmacology learning. Design: This is a comparative study. Methods: The population was 250 nursing students who had to create two infographics in groups related to the content that had been addressed in pharmacology in two different moments. Students and professors evaluated the infographics through a 5-point Likert scale. Scores from the official exam of the pharmacology subject were obtained. Results: Most of the students scored below 50% for the "excellent" and "good" categories. Intraclass correlation and kappa correlations among students and professors' evaluations were low. The comparison between both times of students' evaluations only yields significant correlation values for the criterion "Understanding of information" (r = .039, p = .024) and the "Visual presentation of information" (r = .041, p = .019). No correlation was obtained between the test and evaluations values of the infographic.

1 January 2021 in BioMed Research International
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Journal Article
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EAEsther Aleo
Esther Aleo
APAmanda López Picado
Amanda López Picado
BABelén Joyanes Abancens
Belén Joyanes Abancens
CBCarmen Soto Beauregard
Carmen Soto Beauregard
NSNuria Tur Salamanca
Nuria Tur Salamanca
BUBorja San Pedro de Urquiza
Borja San Pedro de Urquiza
Surgical procedures can generate significant preoperative anxiety (POA) in as much as 70% of the paediatric population. The role of hydroxyzine and distractive techniques such as clowns in the management of anxiety is controversial. Our main objective was to evaluate the effect of hydroxyzine on the control of POA. The secondary objective was to assess the potential additive effect of hydroxyzine and distracting techniques. We performed a randomized double‐blind, controlled clinical trial in children aged 2–16 years undergoing outpatient surgery (n = 165). Subjects were randomized to hydroxyzine (group 1) or placebo (group 2). For the secondary objective, two further groups were made by allocation by chance to hydroxyzine plus accompaniment with clowns (group 3) and placebo plus clowns (group 4). All patients were accompanied by their parents as the standard procedure. POA was determined by a modified Yale scale of POA (m‐YPAS). Compliance of children during induction of anesthesia (Induction Compliance Checklist (ICC)) was also assessed. No differences (p = 0.788) were found in POA control at the time of induction measured by m‐YPAS (group 1: 39.2 ± 27.9; group 2: 37.0 ± 26.1; group 3: 34.7 ± 25.5; group 4: 32.4 ± 20.5). No differences were found in the level of ICC between the different treatment arms (group 1: 1.8 ± 3.4; group 2: 1.5 ± 3.0; group 3: 1.2 ± 2.4; group 4: 1.5 ± 2.7). The combination of all treatments (group 3) was the only effective strategy to contain the progression of anxiety. In conclusion, hydroxyzine was not effective to control POA in children. The combination of hydroxyzine and clowns avoided the progression of POA in our patients. This trial is registered with ClinicalTrials.gov identifier: NCT03324828 (registered 21 September 2017, subject recruitment started on 12th January 2018).

3 January 2022 in Obesity Facts
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Journal Article
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APAntonio Portoles
Antonio Portoles
ARAna Rivas-Paterna
Ana Rivas-Paterna
APAndrés Sánchez Pernaute
Andrés Sánchez Pernaute
AGAntonio José Torres García
Antonio José Torres García
CLCarmen Moreno Lopera
Carmen Moreno Lopera
ECEmilio Vargas Castrillón
Emilio Vargas Castrillón
Introduction: The prevalence of obesity is increasing globally. The principal aim was to evaluate whether gastric bypass surgery modifies the bioavailability and pharmacokinetic (PK) parameters of omeprazole. Methods: Controlled, open-label, bioavailability clinical trial in patients undergoing Roux-en-Y gastric bypass (RYGB). Healthy patients with obesity (body mass index >35) were included and assessed for omeprazole PKs before and after RYGB (1 and 6 months). PK sampling was done at baseline and several times up to 12 h after drug dosing. Pre- and post-surgery parameters were compared using paired ANOVA or Wilcoxon tests, and control versus cases using ANOVA or Mann-Whitney tests. Given the post-surgery change in body weight, parameters were corrected by dose/body weight. Results: Fourteen case and 24 control subjects were recruited; 92% were women (N = 35/38). In patients who underwent RYGB, maximum plasma concentration (Cmax) was significantly reduced at 1 and 6 months after surgery compared with presurgery values (p = 0.001). Regarding the AUC, the values are lower at 1 and 6 months after surgery than at baseline (p < 0.001). The drug clearance was also increased in the first month after surgery. No differences were found between patients 6 months after surgery and controls. Cmax and AUC corrected by dose/body weight were significantly different between the baseline surgery subjects and controls. Discusion/Conclusions: Omeprazole bioavailability is reduced in patients with obesity at 1 and 6 months after RYGB. However, omeprazole PK parameters 6 months after RYGB are similar to control subjects, and thus no dose correction is required after RYGB for a given indication.

26 February 2025 in Pharmaceuticals
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CPCarmen Portolés-Díez
Carmen Portolés-Díez
MBMaría del Rosario Salas Butrón
María del Rosario Salas Butrón
ARAna Ascaso del Río
Ana Ascaso del Río
ARAna Rivas-Paterna
Ana Rivas-Paterna
LVLeonor Laredo Velasco
Leonor Laredo Velasco
APAntonio Portoles
Antonio Portoles
Background/Objectives: Using a combination of analgesics allows for the use of lower doses of each, therefore, lowering risk of side effects. The study aims to estimate the bioavailability (pharmacokinetics of enantiomers and metabolites, as well as linearity and sex-related effects) of fixed doses combinations of Ibuprofen/Tramadol via an intravenous (IV) vs. oral route, and it is interesting to bridge the gap of equipotent doses by different routes. Methods: This was a randomized, open-label, crossover, five-period pharmacokinetics clinical trial, in which a single dose of each formulation [four different strengths of Ibuprofen 400 mg/Tramadol HCl (30, 31.5, 33, 37.5 mg), intravenous; Ibuprofen/Tramadol HCl 400 mg/37.5 mg, granules for oral solution], were administered to healthy volunteers. Enantiomers of Ibuprofen, of Tramadol, and of its main active metabolite O-desmethyl-Tramadol (M1) were measured, and pharmacokinetic parameters (maximal concentration (Cmax) and area under the concentration curve (AUC)) were estimated. Given the exploratory nature of the study, the sample size was small to provide sufficient power for comparisons of differences across all subgroups. The study was registered at Spanish register of clinical trials (REec), EudraCT code: 2017-001303-77. Results: Twelve subjects were recruited. Different patterns of rate and amount of the studied analytes are shown for oral and the several strengths of IV drugs tested. Ibuprofen, with an absolute oral bioavailability of 91%, showed an equivalent AUC of oral and IV administration. Tramadol showed an absolute oral bioavailability of 80%. Conclusions: Intravenous administration of Tramadol produces higher bioavailability (Cmax and AUClast) of the parent drug and lower of M1, than oral route. Dose normalized Cmax and AUClast of Tramadol and M1 were into the bioequivalence interval. Upon our pharmacokinetics study results, the intravenous dose of Tramadol should not be reduced when switching from oral dosing. No significant differences attributable to sex, once corrected by weight, were found.

24 September 2025 in Pharmaceutics
Verified
Journal Article
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MBMaría del Rosario Salas Butrón
María del Rosario Salas Butrón
LVLeonor Laredo Velasco
Leonor Laredo Velasco
ARAna Rivas-Paterna
Ana Rivas-Paterna
AGAránzazu González-Corchon
Aránzazu González-Corchon
MMMario Fernando Muñoz-Guerra
Mario Fernando Muñoz-Guerra
APAntonio Portoles
Antonio Portoles
Background: Drug combinations with complementary mechanisms of action are able to achieve effective analgesia at lower doses, thereby reducing the risk of adverse effects (AEs). This study evaluated the analgesic efficacy and tolerability of two fixed-dose combinations (FDCs) of ibuprofen/tramadol (IBU/TRA) compared with tramadol and a placebo. Methods: This multicenter, randomized, double-blind, dose-finding, pilot clinical trial compared IBU/TRA (400/37.5 mg and 400/75 mg) with 100 mg of tramadol and a placebo in patients with moderate-to-severe pain following dental surgery. The primary endpoints were pain intensity at 6 h (PI6h) and the pain intensity difference from baseline to 6 h (PID6h). PID7h, the sum of pain intensity differences from baseline to 7 h (SPID0–7h), pain relief (PAR7h), total pain relief (TOTPAR7h), the use of rescue medication and AEs were also assessed. Results: Seventy-two patients were randomized and evaluated. Both FDCs showed superiority over the placebo for PI6h and PID6h (p < 0.05) but were not significantly different from 100 mg of tramadol. The statistical superiority of FDCs over the placebo was observed for PID7h, SPID0–7h, PAR7h and TOTPAR7h. The percentage of patients receiving rescue medication was higher in the placebo (94.1%) and tramadol (52.6%) groups than the FDC groups (35.3% and 36.8% for 400/37.5 mg and 400/75 mg, respectively). A post hoc analysis showed that the FDCs had a superior analgesic efficacy to 100 mg of tramadol in the SPID0–4h (p < 0.005). The incidence of AEs was comparable between treatment groups. Conclusions: Both FDCs of IBU/TRA provided superior analgesic efficacy compared to the placebo. We propose using SPID0–4h as the preferred variable for evaluating the efficacy of this type of drug combination.