Original Articles
Monitoring of Breathing Pattern at Rest by Electrical Impedance Tomography
Marco Ballezaa,b,
, Jaume Fornosb, Núria Calafa, Teresa Feixasa, Mercedes Gonzáleza, Daniel Antónb, Pere Riub, Pere Casana
Corresponding author
jballeza@santpau.es
Correspondence: Dr. M. Balleza. Unitat de Funció Pulmonar. Hospital de la Santa Creu i Sant Pau. Antoni Maria Claret, 167. 08025 Barcelona. España
Correspondence: Dr. M. Balleza. Unitat de Funció Pulmonar. Hospital de la Santa Creu i Sant Pau. Antoni Maria Claret, 167. 08025 Barcelona. España
Read
5666
Timeswas read the article
1781
Total PDF
3885
Total HTML
Share statistics
array:23 [ "pii" => "S1579212907600743" "issn" => "15792129" "doi" => "10.1016/S1579-2129(07)60074-3" "estado" => "S300" "fechaPublicacion" => "2007-01-01" "aid" => "60074" "copyright" => "Sociedad Española de Neumología y Cirugía Torácica (SEPAR)" "copyrightAnyo" => "2007" "documento" => "article" "crossmark" => 0 "subdocumento" => "fla" "cita" => "Arch Bronconeumol. 2007;43:300-3" "abierto" => array:3 [ "ES" => false "ES2" => false "LATM" => false ] "gratuito" => false "lecturas" => array:2 [ "total" => 3879 "formatos" => array:3 [ "EPUB" => 78 "HTML" => 3091 "PDF" => 710 ] ] "itemSiguiente" => array:18 [ "pii" => "S1579212907600755" "issn" => "15792129" "doi" => "10.1016/S1579-2129(07)60075-5" "estado" => "S300" "fechaPublicacion" => "2007-01-01" "aid" => "60075" "copyright" => "Sociedad Española de Neumología y Cirugía Torácica (SEPAR)" "documento" => "article" "crossmark" => 0 "subdocumento" => "fla" "cita" => "Arch Bronconeumol. 2007;43:304-8" "abierto" => array:3 [ "ES" => false "ES2" => false "LATM" => false ] "gratuito" => false "lecturas" => array:2 [ "total" => 2497 "formatos" => array:3 [ "EPUB" => 89 "HTML" => 1699 "PDF" => 709 ] ] "en" => array:10 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Original Articles</span>" "titulo" => "Usefulness of Computed Tomography in Determining Risk of Recurrence After a First Episode of Primary Spontaneous Pneumothorax: Therapeutic Implications" "tienePdf" => "en" "tieneTextoCompleto" => 0 "tieneResumen" => array:2 [ 0 => "en" 1 => "es" ] "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "304" "paginaFinal" => "308" ] ] "contieneResumen" => array:2 [ "en" => true "es" => true ] "contienePdf" => array:1 [ "en" => true ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "David Martínez-Ramos, Vicente Ángel-Yepes, Javier Escrig-Sos, Juan Manuel Miralles-Tena, José Luis Salvador-Sanchís" "autores" => array:5 [ 0 => array:2 [ "nombre" => "David" "apellidos" => "Martínez-Ramos" ] 1 => array:2 [ "nombre" => "Vicente" "apellidos" => "Ángel-Yepes" ] 2 => array:2 [ "nombre" => "Javier" "apellidos" => "Escrig-Sos" ] 3 => array:2 [ "nombre" => "Juan Manuel" "apellidos" => "Miralles-Tena" ] 4 => array:2 [ "nombre" => "José Luis" "apellidos" => "Salvador-Sanchís" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1579212907600755?idApp=UINPBA00003Z" "url" => "/15792129/0000004300000006/v1_201305150319/S1579212907600755/v1_201305150319/en/main.assets" ] "itemAnterior" => array:18 [ "pii" => "S1579212907600731" "issn" => "15792129" "doi" => "10.1016/S1579-2129(07)60073-1" "estado" => "S300" "fechaPublicacion" => "2007-01-01" "aid" => "60073" "copyright" => "Sociedad Española de Neumología y Cirugía Torácica (SEPAR)" "documento" => "simple-article" "crossmark" => 0 "subdocumento" => "edi" "cita" => "Arch Bronconeumol. 2007;43:297-9" "abierto" => array:3 [ "ES" => false "ES2" => false "LATM" => false ] "gratuito" => false "lecturas" => array:2 [ "total" => 2008 "formatos" => array:3 [ "EPUB" => 85 "HTML" => 1282 "PDF" => 641 ] ] "en" => array:8 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Editorial</span>" "titulo" => "Anticholinergics in the Management of COPD" "tienePdf" => "en" "tieneTextoCompleto" => 0 "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "297" "paginaFinal" => "299" ] ] "contienePdf" => array:1 [ "en" => true ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Inmaculada Alfageme Michavila" "autores" => array:1 [ 0 => array:2 [ "nombre" => "Inmaculada Alfageme" "apellidos" => "Michavila" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1579212907600731?idApp=UINPBA00003Z" "url" => "/15792129/0000004300000006/v1_201305150319/S1579212907600731/v1_201305150319/en/main.assets" ] "en" => array:14 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Original Articles</span>" "titulo" => "Monitoring of Breathing Pattern at Rest by Electrical Impedance Tomography" "tieneTextoCompleto" => 0 "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "300" "paginaFinal" => "303" ] ] "autores" => array:1 [ 0 => array:4 [ "autoresLista" => "Marco Balleza, Jaume Fornos, Núria Calaf, Teresa Feixas, Mercedes González, Daniel Antón, Pere Riu, Pere Casan" "autores" => array:8 [ 0 => array:4 [ "nombre" => "Marco" "apellidos" => "Balleza" "email" => array:1 [ 0 => "jballeza@santpau.es" ] "referencia" => array:3 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff1" ] 1 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff2" ] 2 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">*</span>" "identificador" => "cor1" ] ] ] 1 => array:3 [ "nombre" => "Jaume" "apellidos" => "Fornos" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff2" ] ] ] 2 => array:3 [ "nombre" => "Núria" "apellidos" => "Calaf" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff1" ] ] ] 3 => array:3 [ "nombre" => "Teresa" "apellidos" => "Feixas" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff1" ] ] ] 4 => array:3 [ "nombre" => "Mercedes" "apellidos" => "González" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff1" ] ] ] 5 => array:3 [ "nombre" => "Daniel" "apellidos" => "Antón" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff2" ] ] ] 6 => array:3 [ "nombre" => "Pere" "apellidos" => "Riu" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff2" ] ] ] 7 => array:3 [ "nombre" => "Pere" "apellidos" => "Casan" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff1" ] ] ] ] "afiliaciones" => array:2 [ 0 => array:3 [ "entidad" => "Unitat de Funció Pulmonar, Departament de Pneumologia, Hospital de la Santa Creu i Sant Pau, Facultat de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain" "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff1" ] 1 => array:3 [ "entidad" => "Departament d'Enginyeria Electrònica, Universitat Autònoma de Barcelona, Barcelona, Spain" "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff2" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor1" "etiqueta" => "*" "correspondencia" => "Correspondence: Dr. M. Balleza. Unitat de Funció Pulmonar. Hospital de la Santa Creu i Sant Pau. Antoni Maria Claret, 167. 08025 Barcelona. España" ] ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2006-08-29" "fechaAceptado" => "2006-09-26" "PalabrasClave" => array:2 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Key words" "identificador" => "xpalclavsec154889" "palabras" => array:3 [ 0 => "Electrical Impedance Tomography" 1 => "Breathing pattern" 2 => "Pneumotachometer" ] ] ] "es" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Palabras clave" "identificador" => "xpalclavsec154888" "palabras" => array:3 [ 0 => "Tomografía por impedancia eléctrica" 1 => "Patrón ventilatorio" 2 => "Neumotacómetro" ] ] ] ] "tieneResumen" => true "resumen" => array:2 [ "en" => array:1 [ "resumen" => "<span class="elsevierStyleSectionTitle">OBJECTIVE</span><p class="elsevierStyleSimplePara elsevierViewall">Electrical impedance tomography (EIT) involves the application of a small alternating current to produce a series of chest images that can be used to monitor breathing pattern. The relation between chest images and tidal volume has not been sufficiently validated. The aim of the present study was to analyze the correlation between EIT images and the volume–time signal measured with a pneumotachometer in 13 healthy volunteers.</p> <span class="elsevierStyleSectionTitle">MATERIAL AND METHODS</span><p class="elsevierStyleSimplePara elsevierViewall">The following measurement devices were used: <span class="elsevierStyleItalic">a)</span> MedGraphics preVent™ Pneumotach, with special software for recording the volume–time signal (reference test), and <span class="elsevierStyleItalic">b)</span> EIT-4, a fourth-generation prototype unit designed by the Department of Electronic Engineering at the Universidad Politécnica de Cataluña, Spain that records the volume–time signal and produces a graphic depiction of a cross section of the thorax at the sixth intercostal space.</p> <span class="elsevierStyleSectionTitle">RESULTS</span><p class="elsevierStyleSimplePara elsevierViewall">The mean (SD) tidal volume measured by the pneumotachometer and the EIT-4 was 0.523 (0.102) L and 0.527 (0.106) L, respectively (<span class="elsevierStyleItalic">P</span> value not significant). The linear correlation coefficient between the 2 measurements was 0.923 (<span class="elsevierStyleItalic">P</span> =.001), and the mean of the differences between the 2 procedures was –0.003 L (95% confidence interval, –0.045 to 0.038). The greatest differences were associated with female gender, body mass index, and chest circumference. In view of these differences, a different equation based on these variables was needed for calibration of the EIT-4.</p> <span class="elsevierStyleSectionTitle">CONCLUSIONS</span><p class="elsevierStyleSimplePara elsevierViewall">The EIT-4 provides an alternative means of monitoring breathing pattern, although a number of issues related to the circumference of the rib cage need to be resolved.</p>" ] "es" => array:1 [ "resumen" => "<span class="elsevierStyleSectionTitle">OBJETIVO</span><p class="elsevierStyleSimplePara elsevierViewall">La tomografía por impedancia eléctrica (TIE) permite realizar un seguimiento del patrón ventilatorio a partir de una secuencia de imágenes torácicas obtenidas por la captación de una corriente alterna de baja intensidad. La relación entre las imágenes torácicas y el volumen circulante no está suficientemente validada. El propósito del presente estudio ha sido comparar, en un grupo de 13 voluntarios sanos, la correspondencia entre las imágenes de la TIE y la señal volumen/tiempo obtenida mediante un neumotacómetro.</p> <span class="elsevierStyleSectionTitle">MATERIAL Y MÉTODOS</span><p class="elsevierStyleSimplePara elsevierViewall">Los equipos que se utilizaron para las mediciones fueron: <span class="elsevierStyleItalic">a)</span> MedGraphics prevent TM™ Pneumotach, implementando el <span class="elsevierStyleItalic">software</span> adecuado para registrar las señales volumen/tiempo (prueba de referencia), y <span class="elsevierStyleItalic">b)</span> TIE-4, cuarta versión de un equipo diseñado por el Departamento de Ingeniería Electrónica de la Universidad Politécnica de Cataluña, que permite tanto el registro de la señal volumen/tiempo como una representación gráfica de la sección transversal situada en el sexto espacio intercostal.</p> <span class="elsevierStyleSectionTitle">RESULTADOS</span><p class="elsevierStyleSimplePara elsevierViewall">La media ± desviación estándar de volumen circulante obtenida mediante el neumotacómetro fue de 0,523 ± 0,102 l, y con la TIE-4, de 0,527 ± 0,106 l (p no significativa). El coeficiente de correlación lineal entre ambas determinaciones fue de 0,923 (p = 0,001). La media de las diferencias entre ambos procedimientos fue de –0,003 l (intervalo de confianza del 95%, –0,045 a 0,038). Las mayores diferencias estaban relacionadas con el sexo femenino, el índice de masa corporal y el contorno torácico, lo que obligó a una ecuación diferente para calibrar la TIE-4 en función de estas variables.</p> <span class="elsevierStyleSectionTitle">CONCLUSIONES</span><p class="elsevierStyleSimplePara elsevierViewall">La TIE-4 se presenta como un método alternativo para realizar el seguimiento del patrón ventilatorio, aunque deben resolverse aspectos relacionados con la conformación de la caja torácica.</p>" ] ] "bibliografia" => array:2 [ "titulo" => "REFERENCES" "seccion" => array:1 [ 0 => array:1 [ "bibliografiaReferencia" => array:7 [ 0 => array:3 [ "identificador" => "bib1" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:1 [ "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "JE Cotes" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Libro" => array:5 [ "edicion" => "5th ed." "titulo" => "Lung function. Assessment and application in medicine" "fecha" => "1993" "editorial" => "Blackwell Scientific Publications" "editorialLocalizacion" => "Oxford" ] ] ] ] ] ] 1 => array:3 [ "identificador" => "bib2" "etiqueta" => "2" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Measurement of the separate volume changes of rib cage and abdomen during breathing" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "K Konno" 1 => "J Mead" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "J Appl Physiol" "fecha" => "1967" "volumen" => "22" "paginaInicial" => "407" "paginaFinal" => "422" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/4225383" "web" => "Medline" ] ] ] ] ] ] ] ] 2 => array:3 [ "identificador" => "bib3" "etiqueta" => "3" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Use of electrical impedance tomography (EIT) for the assessment of unilateral pulmonary function" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "E Serrano" 1 => "B de Lema" 2 => "O Casas" 3 => "T Feixas" 4 => "N Calaf" 5 => "V Camacho" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "Physiol Meas" "fecha" => "2002" "volumen" => "23" "paginaInicial" => "211" "paginaFinal" => "220" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/11876236" "web" => "Medline" ] ] ] ] ] ] ] ] 3 => array:3 [ "identificador" => "bib4" "etiqueta" => "4" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Applications of applied potential tomography (APT) in respiratory medicine" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "ND Harris" 1 => "AJ Sugget" 2 => "DC Barber" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "Clin Phys Physiol Meas" "fecha" => "1987" "volumen" => "8" "paginaInicial" => "155" "paginaFinal" => "165" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/3568565" "web" => "Medline" ] ] ] ] ] ] ] ] 4 => array:3 [ "identificador" => "bib5" "etiqueta" => "5" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Tomografía por impedancia eléctrica. Estandarización del procedimiento para su aplicación en neumología" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "B de Lema" 1 => "P Casan" 2 => "PJ Riu" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "Arch Bronconeumol" "fecha" => "2006" "volumen" => "42" "paginaInicial" => "299" "paginaFinal" => "301" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/16827979" "web" => "Medline" ] ] ] ] ] ] ] ] 5 => array:3 [ "identificador" => "bib6" "etiqueta" => "6" "referencia" => array:1 [ 0 => array:1 [ "referenciaCompleta" => "Calverley PMA. Control of breathing. Lung function testing. In: Gosselink R, Stam H, editors. European respiratory monograph. 2005;10;44–56." ] ] ] 6 => array:3 [ "identificador" => "bib7" "etiqueta" => "7" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "A parametric model of the relationship between EIT and total lung volume" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:5 [ 0 => "N Coulombe" 1 => "H Gagnon" 2 => "F Marquis" 3 => "Y Skrobik" 4 => "R Guardo" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1088/0967-3334/26/4/006" "Revista" => array:6 [ "tituloSerie" => "Physiol Meas" "fecha" => "2005" "volumen" => "26" "paginaInicial" => "401" "paginaFinal" => "411" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/15886435" "web" => "Medline" ] ] ] ] ] ] ] ] ] ] ] ] ] "idiomaDefecto" => "en" "url" => "/15792129/0000004300000006/v1_201305150319/S1579212907600743/v1_201305150319/en/main.assets" "Apartado" => null "PDF" => "https://static.elsevier.es/multimedia/15792129/0000004300000006/v1_201305150319/S1579212907600743/v1_201305150319/en/main.pdf?idApp=UINPBA00003Z&text.app=https://archbronconeumol.org/" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1579212907600743?idApp=UINPBA00003Z" ]
| Year/Month | Html | Total | |
|---|---|---|---|
| 2024 November | 6 | 2 | 8 |
| 2024 October | 33 | 28 | 61 |
| 2024 September | 27 | 15 | 42 |
| 2024 August | 44 | 33 | 77 |
| 2024 July | 31 | 19 | 50 |
| 2024 June | 41 | 23 | 64 |
| 2024 May | 50 | 25 | 75 |
| 2024 April | 25 | 22 | 47 |
| 2024 March | 30 | 16 | 46 |
| 2024 February | 33 | 20 | 53 |
| 2023 March | 3 | 4 | 7 |
| 2023 February | 14 | 20 | 34 |
| 2023 January | 15 | 23 | 38 |
| 2022 December | 14 | 25 | 39 |
| 2022 November | 16 | 13 | 29 |
| 2022 October | 22 | 22 | 44 |
| 2022 September | 13 | 22 | 35 |
| 2022 August | 22 | 45 | 67 |
| 2022 July | 19 | 37 | 56 |
| 2022 June | 14 | 23 | 37 |
| 2022 May | 31 | 27 | 58 |
| 2022 April | 18 | 29 | 47 |
| 2022 March | 18 | 47 | 65 |
| 2022 February | 19 | 32 | 51 |
| 2022 January | 12 | 29 | 41 |
| 2021 December | 15 | 37 | 52 |
| 2021 November | 14 | 47 | 61 |
| 2021 October | 17 | 41 | 58 |
| 2021 September | 11 | 60 | 71 |
| 2021 August | 8 | 23 | 31 |
| 2021 July | 9 | 24 | 33 |
| 2021 June | 22 | 27 | 49 |
| 2021 May | 15 | 24 | 39 |
| 2021 April | 16 | 63 | 79 |
| 2021 March | 13 | 14 | 27 |
| 2021 February | 8 | 16 | 24 |
| 2021 January | 9 | 13 | 22 |
| 2020 December | 7 | 7 | 14 |
| 2020 November | 3 | 9 | 12 |
| 2020 October | 4 | 4 | 8 |
| 2020 September | 0 | 2 | 2 |
| 2020 August | 7 | 11 | 18 |
| 2020 July | 15 | 12 | 27 |
| 2020 June | 6 | 2 | 8 |
| 2020 May | 5 | 8 | 13 |
| 2020 April | 11 | 17 | 28 |
| 2020 March | 7 | 7 | 14 |
| 2020 February | 4 | 9 | 13 |
| 2020 January | 8 | 10 | 18 |
| 2019 December | 8 | 10 | 18 |
| 2019 November | 14 | 9 | 23 |
| 2019 October | 5 | 6 | 11 |
| 2019 September | 12 | 12 | 24 |
| 2019 August | 5 | 10 | 15 |
| 2019 July | 14 | 13 | 27 |
| 2019 June | 4 | 5 | 9 |
| 2019 May | 8 | 7 | 15 |
| 2019 April | 13 | 13 | 26 |
| 2019 March | 8 | 23 | 31 |
| 2019 February | 8 | 15 | 23 |
| 2019 January | 2 | 5 | 7 |
| 2018 December | 6 | 15 | 21 |
| 2018 November | 14 | 6 | 20 |
| 2018 October | 25 | 19 | 44 |
| 2018 September | 7 | 5 | 12 |
| 2018 May | 1 | 0 | 1 |
| 2018 April | 4 | 6 | 10 |
| 2018 March | 5 | 6 | 11 |
| 2018 February | 6 | 9 | 15 |
| 2018 January | 2 | 6 | 8 |
| 2017 December | 7 | 5 | 12 |
| 2017 November | 6 | 5 | 11 |
| 2017 October | 4 | 8 | 12 |
| 2017 September | 4 | 7 | 11 |
| 2017 August | 3 | 8 | 11 |
| 2017 July | 4 | 9 | 13 |
| 2017 June | 7 | 39 | 46 |
| 2017 May | 6 | 6 | 12 |
| 2017 April | 2 | 8 | 10 |
| 2017 March | 4 | 5 | 9 |
| 2017 February | 0 | 2 | 2 |
| 2017 January | 3 | 4 | 7 |
| 2016 December | 1 | 1 | 2 |
| 2016 November | 4 | 6 | 10 |
| 2016 October | 5 | 14 | 19 |
| 2016 September | 8 | 7 | 15 |
| 2016 August | 8 | 8 | 16 |
| 2016 July | 4 | 6 | 10 |
| 2016 March | 2 | 0 | 2 |
| 2015 December | 2 | 0 | 2 |
| 2015 October | 109 | 16 | 125 |
| 2015 September | 93 | 15 | 108 |
| 2015 August | 103 | 9 | 112 |
| 2015 July | 148 | 11 | 159 |
| 2015 June | 84 | 6 | 90 |
| 2015 May | 105 | 20 | 125 |
| 2015 April | 94 | 14 | 108 |
| 2015 March | 134 | 8 | 142 |
| 2015 February | 107 | 4 | 111 |
| 2015 January | 78 | 10 | 88 |
| 2014 December | 71 | 7 | 78 |
| 2014 November | 105 | 9 | 114 |
| 2014 October | 92 | 14 | 106 |
| 2014 September | 76 | 9 | 85 |
| 2014 August | 61 | 13 | 74 |
| 2014 July | 94 | 21 | 115 |
| 2014 June | 100 | 14 | 114 |
| 2014 May | 109 | 14 | 123 |
| 2014 April | 104 | 8 | 112 |
| 2014 March | 122 | 10 | 132 |
| 2014 February | 101 | 11 | 112 |
| 2014 January | 75 | 9 | 84 |
| 2013 December | 83 | 10 | 93 |
| 2013 November | 85 | 10 | 95 |
| 2013 October | 64 | 9 | 73 |
| 2013 September | 94 | 9 | 103 |
| 2013 August | 65 | 13 | 78 |
| 2013 July | 64 | 11 | 75 |
| 2013 June | 68 | 9 | 77 |
| 2013 May | 72 | 8 | 80 |
| 2013 April | 51 | 10 | 61 |
| 2013 March | 15 | 4 | 19 |
Show all
