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Lopes LGA, Lopes FC, Quintana KG, Costa PG, de Martinez Gaspar Martins C, Souza MM. Biomineralization biomarkers to assess microplastics toxic effects in the freshwater snail Pomacea canaliculata. Comp Biochem Physiol C Toxicol Pharmacol 2023; 268:109585. [PMID: 36858139 DOI: 10.1016/j.cbpc.2023.109585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 01/28/2023] [Accepted: 02/21/2023] [Indexed: 03/02/2023]
Abstract
Microplastics (MPs) pollution has increased the number of reports on the toxic effects on biota, especially aquatic organisms. Recently, studies highlighted changes in ion transport and concentration, especially Ca2+, in organisms exposed to MPs. For calcifying organisms, such as mollusks, Ca2+ homeostasis is critical for their shells construction. We investigated the effects of polyethylene (PE) MPs at 20 μg/L on biomineralization biomarkers (Ca2+ATPase, carbonic anhydrase, hemolymph [Ca2+], and shell regeneration) of the freshwater gastropod Pomacea canaliculata. Two experimental sets were performed: (1) animals in physiological condition and (2) animals with their shells excised. The results of the first set showed that within 24 h, the hemolymph [Ca2+] decreased, and the Ca2+ATPase activity increased in the mantle edge. For carbonic anhydrase (CA), the activity decreased in the gland and increased in the mantle. By 72 h, the hemolymph [Ca2+] had not changed, whereas both enzymes had increased in both tissues. In the second set, the hemolymph [Ca2+] increased after 72 h, whereas Ca2+ATPase activity decreased in both tissues. For AC, the opposite results were observed. At 120 h, calcium pumping was still reduced and CA values increased in the digestive gland. Additionally, MPs exposure increased the capacity of the gastropods to recover their shells. Based on this, our work provides novel data associating PE microplastic exposures (at 20 μg/L) and their potential to stimulate biomineralization enzymes of P. canaliculata, as well as increase shell regeneration in excised animal; a good prerogative for further investigations on both subjects that still lacks of more robust evidence.
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Affiliation(s)
- Luiz Gustavo Alves Lopes
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Biologia de Ambientes Aquáticos Continentais, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil.
| | - Fernanda Chaves Lopes
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Ciências Fisiológicas, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil
| | - Karine Gularte Quintana
- Universidade Federal do Rio Grande, Graduação em Oceanologia, Instituto de Oceanologia, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil
| | - Patrícia Gomes Costa
- Fundação Espírito-santense de Tecnologia - FEST. Av. Fernando Ferrari, 845 - Goiabeiras, Vitória, ES, Brazil
| | - Camila de Martinez Gaspar Martins
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Biologia de Ambientes Aquáticos Continentais, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil; Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Ciências Fisiológicas, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil
| | - Marta Marques Souza
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Biologia de Ambientes Aquáticos Continentais, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil; Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Ciências Fisiológicas, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil
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Chaves Lopes F, Rosa de Castro M, Caldas Barbosa S, Primel EG, de Martinez Gaspar Martins C. Effect of the UV filter, Benzophenone-3, on biomarkers of the yellow clam (Amarilladesma mactroides) under different pH conditions. Mar Pollut Bull 2020; 158:111401. [PMID: 32753186 DOI: 10.1016/j.marpolbul.2020.111401] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 06/10/2020] [Accepted: 06/20/2020] [Indexed: 05/20/2023]
Abstract
This work aimed to investigate effects of the ocean contamination by the sunscreen Benzophenone-3 (BP3) and acidification, caused by CO2 enrichment, to the yellow clam, Amarilladesma mactroides. Biochemical biomarkers were analyzed in tissues (gills, digestive gland, and mantle) of clams exposed to the environmental concentration of 1 μg/L BP3, at seawater natural pH (pH 8.1) and at lower pH (pH 7.6). The tissues responded in different ways considering their physiological roles. In general, BP3 altered activity of the enzymes, glutathione-S-transferase (GST) and glutathione cysteine ligase (GCL); but mostly increased the level of glutathione (GSH). These effects were enhanced by acidification, without augmenting lipid peroxidation (LPO). Carbonic anhydrase activity (CA) increased after BP3 exposure in the digestive gland and decreased in the gills at pH 7.6, while Ca2+-ATPase activity was affected by acidification only. Changing levels of these enzymes can alter shell formation and affect the bivalve maintenance in impacted environments.
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Affiliation(s)
- Fernanda Chaves Lopes
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Ciências Fisiológicas, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil
| | - Micheli Rosa de Castro
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Ciências Fisiológicas, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil
| | - Sergiane Caldas Barbosa
- Universidade Federal do Rio Grande, Escola de Química e Alimentos, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil.
| | - Ednei Gilberto Primel
- Universidade Federal do Rio Grande, Escola de Química e Alimentos, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil
| | - Camila de Martinez Gaspar Martins
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Ciências Fisiológicas, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil.
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Lopes FC, Junior ASV, Corcini CD, Sánchez JAA, Pires DM, Pereira JR, Primel EG, Fillmann G, Martins CDMG. Impacts of the biocide chlorothalonil on biomarkers of oxidative stress, genotoxicity, and sperm quality in guppy Poecilia vivipara. Ecotoxicol Environ Saf 2020; 188:109847. [PMID: 31732268 DOI: 10.1016/j.ecoenv.2019.109847] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 10/16/2019] [Accepted: 10/19/2019] [Indexed: 06/10/2023]
Abstract
Chlorothalonil is a fungicide present in antifouling paints and other formulations used in agriculture, although studies have shown this chemical to be toxic to fish species. To clarify the deleterious effects of chlorothalonil for these non-target organisms, the present study evaluated the toxic effects of this biocide for the estuarine guppy Poecilia vivipara in terms of an acute mortality test (96 h) and the analysis of biomarkers of oxidative stress, genotoxicity, and sperm quality. The LC50 calculated for P. vivipara was 40.8 μg/L of chlorothalonil. For the analysis of biomarkers, fish were exposed (96 h) to 1 and 10 μg/L of chlorothalonil. It was observed that chlorothalonil alters the levels of pro- and antioxidants towards oxidative stress. In the gills, a negative effect on total antioxidant capacity (ACAP) was detected, while there was a reduction in the activity of glutathione S-transferase (GST) in the liver. However, levels of glutathione (GSH) and the activity and glutamate-cysteine-ligase (GCL) increased in both tissues, as a possible detoxification response. Following chlorothalonil exposure, oxidative damage measured by lipoperoxidation (LPO) significantly increased at the cellular level only (red blood cells (RBCs) and sperm cells). An increase in fluidity of membranes, reactive oxygen species concentration and micronuclei (MNs) incidence were also seen in RBCs. In sperm cells, LPO increased, while membrane and mitochondrial functionality as well as sperm motility decreased. Based on these results, chlorothalonil can be considered as a toxic compound for fish, causing genotoxicity and affecting the RBCs physiology and the fertility of males of P. vivipara.
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Affiliation(s)
- Fernanda Chaves Lopes
- Programa de Pós-Graduação Em Biologia de Ambientes Aquáticos Continentais, Instituto de Ciências Biológicas, Universidade Federal Do Rio Grande, Av. Itália Km 8, CEP. 96203-900, Rio Grande, RS, Brazil
| | - Antonio Sergio Varela Junior
- Programa de Pós-Graduação Em Biologia de Ambientes Aquáticos Continentais, Instituto de Ciências Biológicas, Universidade Federal Do Rio Grande, Av. Itália Km 8, CEP. 96203-900, Rio Grande, RS, Brazil; Programa de Pós-Graduação Em Veterinária. Faculdade de Veterinária. Universidade Federal de Pelotas. Caixa Postal 354, CEP. 96001-970, Pelotas, RS, Brazil
| | - Carine Dahl Corcini
- Programa de Pós-Graduação Em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal Do Rio Grande, Av. Itália Km 8, CEP. 96203-900, Rio Grande, RS, Brazil; Programa de Pós-Graduação Em Veterinária. Faculdade de Veterinária. Universidade Federal de Pelotas. Caixa Postal 354, CEP. 96001-970, Pelotas, RS, Brazil
| | - Jessica Andrea Albañil Sánchez
- Programa de Pós-Graduação Em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal Do Rio Grande, Av. Itália Km 8, CEP. 96203-900, Rio Grande, RS, Brazil
| | - Diego Martins Pires
- Programa de Pós-Graduação Em Veterinária. Faculdade de Veterinária. Universidade Federal de Pelotas. Caixa Postal 354, CEP. 96001-970, Pelotas, RS, Brazil
| | - Jéssica Ribeiro Pereira
- Programa de Pós-Graduação Em Biologia de Ambientes Aquáticos Continentais, Instituto de Ciências Biológicas, Universidade Federal Do Rio Grande, Av. Itália Km 8, CEP. 96203-900, Rio Grande, RS, Brazil
| | - Ednei Gilberto Primel
- Escola de Química e Alimentos, Universidade Federal Do Rio Grande, Av. Itália Km 8, CEP. 96203-900, Rio Grande, RS, Brazil
| | - Gilberto Fillmann
- Programa de Pós-Graduação Em Oceanologia, Instituto de Oceanografia, Universidade Federal Do Rio Grande, Av. Itália Km 8, CEP. 96203-900, Rio Grande, RS, Brazil
| | - Camila De Martinez Gaspar Martins
- Programa de Pós-Graduação Em Biologia de Ambientes Aquáticos Continentais, Instituto de Ciências Biológicas, Universidade Federal Do Rio Grande, Av. Itália Km 8, CEP. 96203-900, Rio Grande, RS, Brazil; Programa de Pós-Graduação Em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal Do Rio Grande, Av. Itália Km 8, CEP. 96203-900, Rio Grande, RS, Brazil.
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Lopes FC, Roperto R, Akkus A, de Queiroz AM, Francisco de Oliveira H, Sousa-Neto MD. Effect of carbodiimide and chlorhexidine on the bond strength longevity of resin cement to root dentine after radiation therapy. Int Endod J 2019; 53:539-552. [PMID: 31715008 DOI: 10.1111/iej.13252] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 11/11/2019] [Indexed: 11/28/2022]
Abstract
AIM To evaluate the effect of carbodiimide (EDC) and chlorhexidine (CHX) on the bond strength (BS) of resin cement to root dentine of teeth submitted to radiotherapy. METHODOLOGY One hundred and twenty extracted maxillary canines were selected and assigned to 2 groups (n = 60): nonirradiated and irradiated (30 cycles of 2 Gy, total 60 Gy). Roots lengths were standardized, and canals were prepared and filled. Post spaces were then prepared, and the samples were redistributed according to dentine treatment (n = 20): saline solution (SF); CHX 2%; or EDC 0.5M. After drying the post space, fibreglass posts were cemented. Cross-sectioned slices were obtained, and in half of the specimens of each subgroup (n = 10), the analysis was performed immediately; the others (n = 10) were stored for 10 months before analyses. The most cervical slice of each third was subjected to a push-out test and failure pattern analysis (n = 10), and the most apical slice submitted to the analysis of the adhesive interface by SEM (n = 5). The bond strength data were submitted to anova and Tukey tests, the adhesive interface adaptation was submitted to Kruskal-Wallis and Dunn's tests, and the Chi-square test was used to evaluate the type of failure. RESULTS The irradiated specimens had significantly lower bond strength (13.8 ± 4.3) than the nonirradiated (18.1 ± 3.1; P < 0.001). For the irradiated teeth, the bond strengths were significantly lower in the SF and CHX groups (P < 0.001). Also, the bond strengths reduced significantly after 10 months in the SF and CHX groups (P < 0.001). Cohesive failures occurred in dentine for irradiated specimens. Poorer interface adaptation, dentine fractures and microfractures were observed in irradiated specimens, and better adaptation was observed for specimens after EDC treatment. CONCLUSIONS Radiotherapy was associated with lower bond strength and worse interface adaptation. Dentine treatment with EDC contributed to adhesive interface longevity during the cementation of glass fibre posts in nonirradiated and irradiated teeth.
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Affiliation(s)
- F C Lopes
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - R Roperto
- Department of Comprehensive Care, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - A Akkus
- Department of Comprehensive Care, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, USA.,Department of Macromolecular Science and Engineering, School of Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - A M de Queiroz
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - H Francisco de Oliveira
- Department of Internal Medicine, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - M D Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
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Fernandes TM, Lopes FC, Santana GCOM, Oliveira MKS, Freitas MO, Freitas CIA. Identification and mapping of real acupoints in the anatomical topography of Boa constrictor. BRAZ J BIOL 2018; 79:243-247. [PMID: 29995135 DOI: 10.1590/1519-6984.179631] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Accepted: 09/29/2017] [Indexed: 11/21/2022] Open
Abstract
Acupuncture is a therapy of the traditional Chinese medicine technique, which over the years has been widespread in the West. Defined as a needle-point treatment technique (acupoints), exactly preconfigured in the body to produce a specific physiological reaction to restore the balance between the function of conflicting states and homeostasis, alternating states of energy and thus maintain the ideal organ and body organization. Thus, the objective of this study was to map and describe the main points of acupuncture in the species Boa constrictor , and their indications to promote the balance of this species. The unprecedented result of the mapping was the discovery of specific acupoints with individual location indications without distribution in specific meridians and dispersedly distributed in the body.
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Affiliation(s)
- T M Fernandes
- Laboratório de Estudos em Imunologia e Animais Silvestres, Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido - UFERSA, BR 110, Km 47, Bairro Presidente Costa e Silva, CEP 59625-900, Mossoró, RN, Brasil
| | - F C Lopes
- Laboratório de Estudos em Imunologia e Animais Silvestres, Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido - UFERSA, BR 110, Km 47, Bairro Presidente Costa e Silva, CEP 59625-900, Mossoró, RN, Brasil
| | - G C O M Santana
- Laboratório de Estudos em Imunologia e Animais Silvestres, Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido - UFERSA, BR 110, Km 47, Bairro Presidente Costa e Silva, CEP 59625-900, Mossoró, RN, Brasil
| | - M K S Oliveira
- Laboratório de Estudos em Imunologia e Animais Silvestres, Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido - UFERSA, BR 110, Km 47, Bairro Presidente Costa e Silva, CEP 59625-900, Mossoró, RN, Brasil
| | - M O Freitas
- Laboratório de Estudos em Imunologia e Animais Silvestres, Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido - UFERSA, BR 110, Km 47, Bairro Presidente Costa e Silva, CEP 59625-900, Mossoró, RN, Brasil
| | - C I A Freitas
- Laboratório de Estudos em Imunologia e Animais Silvestres, Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido - UFERSA, BR 110, Km 47, Bairro Presidente Costa e Silva, CEP 59625-900, Mossoró, RN, Brasil
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Yamin PA, Pereira RD, Lopes FC, Queiroz AM, Oliveira HF, Saquy PC, Sousa-Neto MD. Longevity of bond strength of resin cements to root dentine after radiation therapy. Int Endod J 2018; 51:1301-1312. [PMID: 29729026 DOI: 10.1111/iej.12945] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 04/26/2018] [Indexed: 12/13/2022]
Abstract
AIM To evaluate the bond strength and adhesive interface between several resin cements and root dentine immediately and 6 months after radiotherapy. METHODOLOGY Sixty maxillary canines were selected and randomly assigned to two groups (n = 30): one group was not irradiated and the other one was subjected to a cumulative radiation dose of 60 Gy. The teeth were sectioned to obtain roots 16 mm long and the canals were prepared with the Reciproc system (R50) and filled using a lateral condensation technique with an epoxy resin sealer. Each group was divided into three subgroups (n = 10) according to the resin cement used for fibreglass fibre post cementation: RelyX-U200, Panavia-F2.0 and RelyX ARC. The posts were cemented in accordance with the manufacturer's recommendations. Three 1-mm-thick dentine slices were then obtained from each root third. The first two slices in the crown-apex direction of each third were selected for the push-out test. The failure mode after debonding was determined with a stereo microscope. The third slice from each root third was selected for scanning electron microscopy (SEM) analyses to examine the resin cement-dentine interface with 100, 1000, 2000 and 4000× magnification. Bond strength data were analysed by anova and Tukey's test (α = 0.05). RESULTS Significantly lower bond strength (P < 0.0001) was obtained after irradiation compared to nonirradiated teeth. RelyX-U200 cemented fibre posts had the higher bond strength (15.17 ± 5.89) compared with RelyX ARC (P < 0.001) and Panavia-F2.0 (P < 0.001). The evaluation after 6 months revealed lower bond strength values compared to the immediate values (P < 0.001) for irradiated and nonirradiated teeth. Cohesive failures occurred in the irradiated dentine. SEM revealed fractures, microfractures and fewer collagen fibres in irradiated root dentine. RelyX-U200 and Panavia-F2.0 were associated with a juxtaposed interface of the cement with the radicular dentine in irradiated and nonirradiated teeth, and for RelyX ARC, hybrid layer formation and tags were observed in both irradiated and nonirradiated teeth. CONCLUSION Radiation was associated with a decrease in the push-out bond strength and with lower resin cement/root dentine interface adaptation. Self-adhesive resin cement was a better alternative for fibre post cementation in teeth subjected to radiation therapy. The bond strength decreased after 6 months.
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Affiliation(s)
- P A Yamin
- Department of Restorative Dentistry, University of São Paulo, Ribeirão Preto, Brazil
| | - R D Pereira
- Department of Restorative Dentistry, University of São Paulo, Ribeirão Preto, Brazil
| | - F C Lopes
- Department of Restorative Dentistry, University of São Paulo, Ribeirão Preto, Brazil
| | - A M Queiroz
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, Ribeirão Preto, Brazil
| | - H F Oliveira
- Department of Internal Medicine, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - P C Saquy
- Department of Restorative Dentistry, University of São Paulo, Ribeirão Preto, Brazil
| | - M D Sousa-Neto
- Department of Restorative Dentistry, University of São Paulo, Ribeirão Preto, Brazil
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Abstract
Histamine release induced by plant lectins was studied with emphasis on the carbohydrate specificity, external calcium requirement, metal binding sites, and mast cell heterogeneity and on the importance of antibodies bound to the mast cell membrane to the lectin effect. Peritoneal mast cells were obtained by direct lavage of the rat peritoneal cavity and guinea pig intestine and hamster cheek pouch mast cells were obtained by dispersion with collagenase type IA. Histamine release was induced with concanavalin A (Con A), lectins from Canavalia brasiliensis, mannose-specific Cymbosema roseum, Maackia amurensis, Parkia platycephala, Triticum vulgaris (WGA), and demetallized Con A and C. brasiliensis, using 1-300 microg/ml lectin concentrations applied to Wistar rat peritoneal mast cells, peaking on 26.9, 21.0, 29.1, 24.9, 17.2, 10.7, 19.9, and 41.5%, respectively. This effect was inhibited in the absence of extracellular calcium. The lectins were also active on hamster cheek pouch mast cells (except demetallized Con A) and on Rowett nude rat (animal free of immunoglobulins) peritoneal mast cells (except for mannose-specific C. roseum, P. platycephala and WGA). No effect was observed in guinea pig intestine mast cells. Glucose-saturated Con A and C. brasiliensis also released histamine from Wistar rat peritoneal mast cells. These results suggest that histamine release induced by lectins is influenced by the heterogeneity of mast cells and depends on extracellular calcium. The results also suggest that this histamine release might occur by alternative mechanisms, because the usual mechanism of lectins is related to their binding properties to metals from which depend the binding to sugars, which would be their sites to bind to immunoglobulins. In the present study, we show that the histamine release by lectins was also induced by demetallized lectins and by sugar-saturated lectins (which would avoid their binding to other sugars). Additionally, the lectins also released histamine from Rowett nude mast cells that are free of immunoglobulins.
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Affiliation(s)
- F C Lopes
- Departamento de Farmacologia, Instituto de Biociências, Universidade Estadual Paulista, 18618-000 Botucatu, SP, Brasil
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Secca MF, Vilela P, Ferreira JL, Lopes FC, Goulão A. Endovascular Pressure Measurements: Validation with a Pulsatile Flow Model and Haemodynamic Assessment of Brain AVMs. Interv Neuroradiol 2004; 10:281-91. [PMID: 20587211 PMCID: PMC3463287 DOI: 10.1177/159101990401000401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2004] [Accepted: 11/07/2004] [Indexed: 11/16/2022] Open
Abstract
SUMMARY Intravascular pressure measurements for several types of endovascular catheters were obtained in an in vitro model to validate the pressure readings obtained during the interventional procedures of brain AVM embolization. An experimental model was used where the beat rate, flow and pressures were as close as possible to the average human values of interest. It is shown that the corrections increase with the decreasing inner diameter of the catheter used and with increasing vascular pressure. We have also shown that there were no differences between measurements made with the catheter in the direction of flow or against it. An average pressure reading corrections for the various microcatheters to compensate the readings obtained during in vivo monitoring is presented. The haemodynamic assessment of 81 brain AVMs was performed using the endovascular measurement of arterial pressure in 389 feeding arteries during embolization. Mostly, the feeders' arterial median pressure was half the systemic arterial pressure but there was a wide variability of AV shunts in brain AVMs not only from one brain AVM to another but also within the same brain AVM. Measurement of arterial feeder pressure is an inexpensive, quick and accurate tool to evaluate the type of AV shunts within brain AVM.
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Affiliation(s)
- M Forjaz Secca
- Physics Department, Science and Technology Faculty (CeFITeC), Lisbon University (Univ. Nova de Lisboa, UNL); Portugal -
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Affiliation(s)
- F C Lopes
- Department of Microbiology and Immunology, Biosciences Institute, UNESP, Botucatu, SP, Brazil
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