Accuracy and precision of blood pressure determination with the Finapres: an overview using re-sampling statistics

Silke, Bernard; McAuley, Daniel F.

doi:10.1038/sj.jhh.1000600

Cited by 104 publications

(65 citation statements)

References 24 publications

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“…Previous validation of the Finometer's predecessor, the Finapres, stated that the Finapres systolic pressure may indicate quite large differences to the systolic pressure recorded more proximally in the circulation. 7 From the results of this study, the SBP difference in standard deviation was actually smaller than that of the DBP (Table 2), and both SBP and DBP complied to AAMI criteria. This indicates that the Finometer's compensation for the distortion of the pressure waveform along the arm artery, correction for the finger pressure by using brachial pressure, upgraded software and correction for the hydrostatic height of the finger 11 might prove to have increased the Finometer's accuracy in measuring SBP.…”

Section: Discussionmentioning

confidence: 88%

“…[2][3][4] It has been shown that the vascular unloading technique of Penáz together with the Physiocal criteria of Wesseling provides reliable, noninvasive and continuous estimates of BP. [5][6][7] However, previous studies 7 have indicated that although the Finapres fulfilled the accuracy requirements for the mean and diastolic mean difference (+1.7 mmHg (s.d. 6.8) and; À1.0 mmHg (s.d.…”

Section: Introductionmentioning

confidence: 99%

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Validation of the Finometer device for measurement of blood pressure in black women

et al. 2004

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The improved Finapres apparatus, known as the Finometer, measures finger blood pressure noninvasively on a beat-to-beat basis and gives waveform measurements similar to intra-arterial recordings. The Finometer measures brachial pressure and corrects for finger pressure accordingly. It also corrects for the hydrostatic height of the finger with respect to the heart level. The objective was to validate the Finometer according to the revised British Hypertension Society (BHS) protocol and the criteria of the Association for the Advancement of Medical Instrumentation (AAMI). We carried out a main validation test using a subject group of 102 black women, which was also divided into smaller groups, namely 24 hypertensives, 25 obese normotensive and 35 lean normotensive women. Finometer and mercury sphygmomanometer blood pressure (BP) measurements were taken early in the morning before breakfast, after the subjects stayed overnight in a research unit. Within the whole subject group, the Finometer satisfied the AAMI criteria for accuracy and achieved an overall A/B grading according to the BHS criteria. The sphygmomanometer measurements were 128 7 20/ 78 7 12 mmHg compared to 130 7 20/78 7 11 mmHg for the Finometer. The average differences between the mercury sphygmomanometer and Finometer readings for systolic and diastolic BP were, respectively, À1.83 7 6.8 and 0.88 7 7.5. Systolic readings of the Finometer device differed by less than 5 mmHg for 64%, by less than 10 mmHg for 86% and differed by less than 15 mmHg for 96% of all readings. A total of 63% of all diastolic readings of the Finometer by less than 5 mmHg, 85% by less than 10 mmHg and 94% of all readings differed by less than 15 mmHg. On the basis of these results, the Finometer device satisfied the validation criteria of AAMI and received an A/B grading according to the BHS protocol. It can therefore be recommended for measurements in the clinical set-up and for research purposes.

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Section: Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Validation of the Finometer device for measurement of blood pressure in black women

et al. 2004

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“…23,24 The vascular unloading technique of Peñ áz together with the Physiocal criteria of Wesseling provided reliable, noninvasive and continuous estimates of blood pressure, which are useable especially in comparative studies, as with this one. 25,26 Since the pressure waveform is available continuously, computations provide further information on the dynamics of the cardiovascular system, similar to intra-arterial measurements. 24,[27][28][29][30][31] Body mass and height measurements were also taken.…”

Section: Methodsmentioning

confidence: 99%

Leptin is favourably associated with vascular function in obese Caucasians, but not in obese Africans

et al. 2005

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The comparison of the associations between chronically elevated leptin levels and cardiovascular function in obese Africans and Caucasians has not yet been determined. Therefore, the aim of this study was to compare leptin's associations with cardiovascular function in obese African and obese Caucasian women to determine whether leptin's associations differ between these two groups. This study consisted of two casecase control studies. The first study included a sample of 102 apparently healthy African women and the second, 115 apparently healthy Caucasian women. All lean and obese subjects were selected from each study. The Finometer apparatus was used to obtain a more elaborate cardiovascular profile. Serum leptin levels, insulin levels and the lipid profile were determined. Stroke volume (SV) and cardiac output (CO) were significantly (Pp0.01) elevated in both obese African and Caucasian groups compared to their lean controls.Total peripheral resistance (TPR) was significantly decreased and arterial compliance (C W ) significantly increased in both obese African and Caucasian groups. In the obese Caucasian group, diastolic blood pressure (DBP) was significantly (Pp0.01) lower, SV and C W significantly higher (Pp0.01) and TPR significantly lower compared to the age, body mass index (BMI), and leptin-matched obese African group. After adjusting for age and BMI, leptin correlated negatively with DBP (Pp0.05; r ¼ À0.33) and TPR (Pp0.05; r ¼ À0.36) in the obese Caucasian group, but not in the obese African group. Even though leptin levels were similar in obese African and Caucasian women, leptin is favourably associated with vascular function in obese Caucasians, but not in obese Africans.

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“…The subjects were connected to the Finapres (fingerarterial pressure) apparatus 18,19 and blood pressure was recorded continuously. After a period of rest of at least 10 min, resting blood pressure values were obtained.…”

Section: Blood Pressurementioning

confidence: 99%

“…The resting blood pressure was then recorded continuously for 1 min. The data were stored on magnetic tape by means of a Kyowa RTP-50A four-channel data recorder and digitised for further analysis by means of the Fast Modelflo 19,21 This technique is thus an alternative to the invasive intra-arterial measurements in many cases, without the risks and ethical questions inherent to invasive measurements. Since the pressure waveform is available continuously, computations provide further information on the dynamics of the cardiovascular system on a beat-to-beat basis, similar to intraarterial measurements.…”

Section: Blood Pressurementioning

confidence: 99%

Dietary risk markers that contribute to the aetiology of hypertension in black South African children: the THUSA BANA study

Schutte¹,

Rooyen²,

Huisman³

et al. 2003

J Hum Hypertens

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Although clinical hypertension occurs less frequently in children than in adults, ample evidence supports the concept that the roots of essential hypertension extend back to childhood. Since little is available in the literature on causal dietary factors of hypertension in children, this study hypothesised that certain dietary factors can be identified as risk markers that might contribute to the aetiology of hypertension in black children. Children aged 10-15 years were randomly selected from 30 schools in the North West Province from 2000 to 2001. These children comprised 321 black males and 373 females from rural to urbanised communities, of which 40 male and 79 female subjects were identified with high-normal to hypertensive blood pressure. Blood pressure was measured with a Finapres apparatus and data were analysed with the Fast Modelflo software program to provide systolic, diastolic and mean blood pressure. A 24-h dietary recall questionnaire and weight and height measurements were taken.In a stepwise regression analysis, the following variables were significantly associated (Pp0.05) with blood pressure parameters of hypertensive males: biotin, folic acid, pantothenic acid, zinc and magnesium. Energy, biotin and vitamin A intakes were significantly associated with blood pressure parameters of hypertensive females. No significant dietary markers were indicated for any of the normotensive groups. Dietary intakes of all of these nutrients were well below the dietary reference intakes. In conclusion, the dietary results coupled with the cardiovascular parameters of this study identified folic acid and biotin as risk markers that could contribute to the aetiology of hypertension in black persons. The low intakes of these nutrients, among others, is a matter of serious concern, as is the increasing tendency towards urbanisation.

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Accuracy and precision of blood pressure determination with the Finapres: an overview using re-sampling statistics

Cited by 104 publications

References 24 publications

Validation of the Finometer device for measurement of blood pressure in black women

Validation of the Finometer device for measurement of blood pressure in black women

Leptin is favourably associated with vascular function in obese Caucasians, but not in obese Africans

Dietary risk markers that contribute to the aetiology of hypertension in black South African children: the THUSA BANA study

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