Computer analysis of electrical and mechanical activity of stomach, duodenum and caecum over long periods

Hiesinger, E.; Hoernicke, H.; Ehrlein, H. J.

doi:10.1007/978-94-017-4389-1_28

Cited by 8 publications

(5 citation statements)

References 3 publications

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“…2). The signal of each motility record was continuously examined on the occurrence of minimal and maximal values by two separate peak detectors as previously described by Hiesinger, Hornicke & Ehrlein (1978). The beginning of a contraction was detected when the voltage between two contractions was minimal and when afterwards voltage increased and exceeded a level of 50 mV.…”

Section: Discussionmentioning

confidence: 99%

Computer Analysis of Mechanical Activity of Gastroduodenal Junction in Unanaesthetized Dogs

Ehrlein

Hiesinger

1982

Exp Physiol

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SUMMARYIn four conscious dogs mechanical activity of the gastroduodenal junction was recorded with chronically implanted strain gauge transducers and induction coils. The data were evaluated by a computer. Analog circuits were used in order to reduce the data which were transferred to the computer. In the digestive state the contractions of the pyloric sphincter and duodenal bulb were correlated in such a way that the contractions of the duodenal bulb were inhibited when the gastric waves travelled across the antrum and that the bulb contracted once or twice when the peristaltic waves arrived at the gastroduodenal junction. However, the timing between pyloric and duodenal contractions was imperfect. Contraction maxima of the duodenal bulb often occurred before the pylorus was closed. This was due to the different inherent frequencies of the pyloric and duodenal contractions. In the interdigestive state the timing between the pyloric and duodenal contractions was as imperfect as during the digestive state. In phase III of the interdigestive activity, however, the strong antral contractions were regularly associated with inhibition of the duodenal bulb. This phenomenon can be interpreted as co-ordination between gastric and duodenal activity.

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Section: Discussionmentioning

confidence: 99%

Computer Analysis of Mechanical Activity of Gastroduodenal Junction in Unanaesthetized Dogs

Ehrlein

Hiesinger

1982

Exp Physiol

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“…In order to evaluate the results, it is important to describe the nature of the contractions of the sphincter. The de scription of this activity is most detailed in the opossum: The sphincter of Oddi is a highpressure zone with peristaltic activity, begin ning in the proximal segment and moving distally [11,18], The slow-wave control ac tivity has been confirmed by EMG. The ac tivity moves from the proximal to the distal part of the sphincter, and simultaneous pres sure measurements have demonstrated that the contraction waves are closely related to the slow waves [12],…”

Section: Discussionmentioning

confidence: 99%

“…As suming that the slow-wave activity is con stant, the distance between the contractions is equally constant, i.e. corresponding to slow-wave frequency or a multiple of this value [11,17],…”

Section: Discussionmentioning

confidence: 99%

“…In the antrum and duodenum, however, slow-wave activity has previously been demonstrated during the analysis of the pressure wave peak-to-peak intervals (PPI). If the activity is controlled by slow-wave activity, the PPI occur with a cer tain basal value, or a multiple of this value [11,17]. Accordingly, the purpose of the present study was to measure continuously the contractile activity of the sphincter of Oddi and to analyze the intervals between the contractions in order to demonstrate the possible presence of slow-wave control ac tivity.…”

Section: Introductionmentioning

confidence: 99%

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Multimodal Contractile Activity of the Canine Sphincter of Oddi

Funch‐Jensen¹,

Kraglund²,

Djurhuus³

1984

Eur Surg Res

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Using a high-fidelity recording system, simultaneous manometric measurements of the sphincter of Oddi and duodenum were performed in 6 dogs. The sphincter of Oddi was a high-pressure zone with superimposed phasic activity. The tracings were analyzed according to the distribution of the peak-to-peak contraction intervals (PPI), and a multimodal distribution was consistently found with a basal mode of 3.5 s. If not occurring at this interval, the PPI would be a multiple of this value. These findings suggest that slow-wave control activity is present in the canine sphincter of Oddi. The origin of this control is still unknown.

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“…Las técnicas basadas en el cruce de niveles umbral tratan de caracterizar la actividad de la OL y principalmente de SB (directamente asociados a la actividad motora) mediante la obtención de parámetros como su amplitud, duración, nº de SB, nº de picos por ráfaga de SB…. Estos parámetros pueden obtenerse mediante técnicas analógicas de comparación (comparadores con histéresis, disparadores Schmitt…) [BARNETT CRENNER ET AL., 1982;CHALLIS ET AL., 1989;HIESINGER ET AL., 1978] Tampoco hay unanimidad en cuanto a qué parámetro representa mejor la actividad motora gastrointestinal aunque las más utilizadas son el porcentaje de ondas lentas acompañadas de SB durante un intervalo de tiempo (1 o 2 minutos) [DUSDIEKER Y SUMMERS, 1980;WEISBRODT 1987] y el número de SB que se generan en un minuto [GROH ET AL, 1984;ZENILMAN ET AL, 1992]. Hay que destacar que estos parámetros proporcionan índices de motilidad discretos basados en el número de contracciones (aprox.…”

Section: Técnicas Temporalesunclassified

Identificación de la Señal Mioeléctrica del Intestino Delgado Registrada en Superficie Externa Abdominal. Comparativa con Registros Internos.

Casado¹,

Javier²

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Computer analysis of electrical and mechanical activity of stomach, duodenum and caecum over long periods

Cited by 8 publications

References 3 publications

Computer Analysis of Mechanical Activity of Gastroduodenal Junction in Unanaesthetized Dogs

Computer Analysis of Mechanical Activity of Gastroduodenal Junction in Unanaesthetized Dogs

Multimodal Contractile Activity of the Canine Sphincter of Oddi

Identificación de la Señal Mioeléctrica del Intestino Delgado Registrada en Superficie Externa Abdominal. Comparativa con Registros Internos.

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