title: In vivo measurement of the pressure signal in the intervertebral disc of an anesthetized sheep.
abstract: The purpose of the present study was to measure the intradiscal pressure signal of an anesthetized sheep under spontaneous breathing. An ultra-miniature fiber optic high-pressure sensor was implanted into the nucleus pulposus of the fifth lumbar intervertebral using a dorsolateral transforaminal approach. Results suggested the periodicity of the intradiscal pressure signal was similar to the mean respiratory rate of the animal. The average resting intradiscal pressure was also calculated and compared to available data.
authors.affiliation: University of Aveiro, Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, 3810-193 Aveiro, PortugalbINESC-Porto and Faculty of Sciences of the University of Porto, Rua do Campo Alegre, 687, 4150-179, Porto, Portugal.
authors.forename: Paulo
authors.initials: P
authors.lastname: Roriz
authors.affiliation: INESC-Porto and Faculty of Sciences of the University of Porto, Rua do Campo Alegre, 687, 4150-179, Porto, Portugal.
authors.forename: João M C
authors.initials: JM
authors.lastname: Ferreira
authors.affiliation: Universidade de Évora, Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Veterinary Department, Núcleo de Mitra, Apartado 94, 7002-554 Évora.
authors.forename: José C
authors.initials: JC
authors.lastname: Potes
authors.affiliation: Universidade de Évora, Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Veterinary Department, Núcleo de Mitra, Apartado 94, 7002-554 Évora.
authors.forename: Maria T
authors.initials: MT
authors.lastname: Oliveira
authors.affiliation: INESC-Porto and Faculty of Sciences of the University of Porto, Rua do Campo Alegre, 687, 4150-179, Porto, Portugal.
authors.forename: Orlando
authors.initials: O
authors.lastname: Frazão
authors.affiliation: INESC-Porto and Faculty of Sciences of the University of Porto, Rua do Campo Alegre, 687, 4150-179, Porto, Portugal.
authors.forename: José Luís
authors.initials: JL
authors.lastname: Santos
authors.affiliation: University of Aveiro, Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, 3810-193 Aveiro, Portugal.
authors.forename: José António de Oliveira
authors.initials: JA
authors.lastname: Simões
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena / Q000502:physiology*; D002138:Calibration; D005260:Female; D007403:Intervertebral Disc / Q000502:physiology*; D016014:Linear Models; D008991:Monitoring, Physiologic / Q000295:instrumentation* / Q000379:methods; D011312:Pressure; D012756:Sheep; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*