Comparison between invasive blood pressure and a non-invasive blood pressure monitor in anesthetized sheep

Almeida, Daniel; Barletta, Michele; Mathews, Lindsey; Graham, Lori; Quandt, Jane

doi:10.1016/j.rvsc.2014.10.004

Cited by 13 publications

(19 citation statements)

References 17 publications

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“…Invasive method proved to yield significantly more repeatable BP measurements (as indicated by significantly lower CV%) than oscillometry and Doppler. Generally, the range of CV% observed was wide although quite similar to previously obtained [ 19 ] and DBP was recorded with greater variability than the other two BPs ( S1 File ). On the other hand, both the CV% and the number of outliers identified in this study were lower than in the study carried out before in conscious goats [ 15 ], which implies that alleviation of goat anxiety by anesthesia improves the repeatability of BP measurements.…”

Section: Discussionsupporting

confidence: 88%

“…Ninety five per cent of oscillometric BP measurements are expected to differ from invasive BP measurements by at most 20–25 mmHg, which is less than allowed by ACVIM guidelines (1.96 × SD of 15 mmHg which is ±30 mmHg from the bias between invasive and non-invasive method; [ 4 ]). Agreement in our study was better than showed in adult sheep [ 18 , 19 ] or in the mixed group of adult goats and sheep [ 20 ] between invasive BP on the auricular arteria and oscillometry on the left thoracic limb. Nevertheless, the identical tendencies were observed: in the three aforementioned studies, like in ours, SBP was not significantly biased (the mean difference of 0), while both DBP and MBP were significantly underestimated by oscillometry.…”

Section: Discussioncontrasting

confidence: 58%

“…Oscillometry has proven to be acceptably consistent with invasive BP measurement in anesthetized dogs [ 9 , 16 ], cats [ 10 ], horses [ 17 ], and also in 20 adult sheep [ 18 ]. On the other hand, Almeida et al (2014) found oscillometry insufficiently accurate in the study on 13 anaesthetized adult sheep [ 19 ]. Also Aarnes et al (2014) showed violation of ACVIM validation criteria in anaesthetized sheep, goats and cattle of various body weight, however the small ruminant group consisted of only 12 goats and 8 sheep and the two species were merged together for analytical purposes 20.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of oscillometric, Doppler and invasive blood pressure measurement in anesthetized goats

et al. 2018

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Arterial blood pressure (BP) can be measured directly using an invasive intra-arterial method. This method is considered a gold standard, however it is potentially hazardous and requires expensive equipment and professional skills. Therefore, two non-invasive methods–Doppler ultrasonic sphygmomanometry and oscillometry–have been introduced in veterinary medicine. Their accuracy has so far been reliably evaluated in various animal species, however only one study included a small group of goats. Therefore, we carried out a large-scale study which aimed to evaluate agreement between the two non-invasive methods and invasive intra-arterial BP measurement in anesthetized goats at various age. The study included 122 goats of two Polish local breeds (Polish White Improved and Polish Fawn Improved): 67 adult females, 35 adult males, and 20 two-month-old female kids. Goats were anesthetized with the intravenous mixture of xylazine and ketamine. BP was measured simultaneously with the three methods in each goat with 7 measurements on average taken. The study showed that according to the criteria of the American College of Veterinary Internal Medicine (ACVIM) oscillometric method yielded BP measurements sufficiently consistent with invasive intra-arterial method in anesthetized adult goats– 95% of oscillometric BP measurements were expected to differ from invasive BP measurements by at most ±20–25 mmHg. The agreement was worse in goat kids–oscillometry significantly overestimated invasive BP measurements, which resulted in highly asymmetrical 95% limits of agreement. Doppler systolic BP very poorly conformed to invasive systolic BP both in adult goats and in kids and all the ACVIM criteria were violated. Concluding, oscillometry, but not Doppler ultrasonic sphygmomanometry, may be regarded as an alternative to invasive BP measurement in large-scale scientific studies involving adult goats, however, individual oscillometric BP measurements should be treated with caution as estimated 95% limits of agreement were wide.

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Section: Discussionsupporting

confidence: 88%

Section: Discussioncontrasting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

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Comparison of oscillometric, Doppler and invasive blood pressure measurement in anesthetized goats

et al. 2018

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“…On the other hand, Heard et al (38) disagreed with these results regarding relationship between non-invasive & invasive as they analyzed ABP data obtained by noninvasive method and found variation in results when compared with invasive method. Furthermore, Acierno et al (39) Shih et al (40) and Almeida (41) found a difference between the two methods. Based on that critical care nurses are responsible for monitoring patients' hemodynamical status and reporting any deviation from normal, they have to know the effect of certain drugs on vital signs to obtain hemodynamic stability.…”

Section: Discussionmentioning

confidence: 98%

Mean Arterial Blood Pressure Monitoring Among Pediatric Patients after Open Heart Surgery

Ahmed¹,

Elsaman²,

Essa³

2017

IOSR JNHS

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“…In sedated sheep, the difference between invasive and a non invasive blood pressure measurements are taken. The objective of this examination was to decide the accuracy of the petMAP in anesthetized sheep confronting a medical procedure [2].Machine learning techniques and characteristic features of the photo plethysmography signals are utilized for the measurement of hemoglobin non-invasively [3].A noninvasive antenatal finding of hb Bart's disease by cardiothoracic ratio over the first period was given [4].The effects of a sympathetic block on Plethysmographic analysis of Hb concentration, Perfusion and Pleth variability Index with the Radical-7 apparatus was studied [5].The hb concentration in arterial blood was measured non-invasively. For this purpose a magnet was used which is set essentially over the radial artery of an individual whose hb concentration is to be discovered [6].Observable Red Laser light of wavelength 650 nm was used by the simple and beneficial noninvasive device for Blood Glucose Monitoring (RL-BGM) [7].The impacts of Skin thickness and Fingerprints was pretended to show the issues with Noninvasive RF Blood Glucose Sensing from Fingertips [8].…”

Section: Related Workmentioning

confidence: 99%

Non Invasive Measurement of Hemoglobin using Optical Sensor

2019

IJRTE

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Hemoglobin (hb) concentration is a basic parameter in the human blood, the absense of which causes anemia. The proposed work stays away from the superfluous wastage of blood while estimating hb concentration which could have serious impact on a anemic patient. There are fundamentally two classifications to be specific, invasive and non-invasive methods.In the invasive method blood sample is collected by hurtful needle stick. After that the collected blood sample is sent to a laboratory for examination. Then the results are announced back to the docter later which possibly leads to analysis and treatement delay. A non-invasive technique permits torment free online patient checking framework with least danger of infection. An optical non-invasive system is introduced for Hb focus. In this anew advanced system, retention of light by oxygenated and deoxygenated hemoglobin is estimated at two wavelengths 660nm and 940nm. The specific wavelength of light is acquired from red and IR LED. The absorption coefficient of blood differs at various wavelength this reality is utilized to compute concentration of the hemoglobin.

show abstract

Comparison between invasive blood pressure and a non-invasive blood pressure monitor in anesthetized sheep

Cited by 13 publications

References 17 publications

Comparison of oscillometric, Doppler and invasive blood pressure measurement in anesthetized goats

Comparison of oscillometric, Doppler and invasive blood pressure measurement in anesthetized goats

Mean Arterial Blood Pressure Monitoring Among Pediatric Patients after Open Heart Surgery

Non Invasive Measurement of Hemoglobin using Optical Sensor

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