A Comparison of Indirect Blood Pressure Monitoring Techniques in the Anesthetized Cat

Veterinary Surgery - Tập 27 Số 4 - Trang 370-377 - 1998
Nigel Caulkett1,2, Shauna L. Cantwell1,2, Doreen Μ. Houston1,2
1Department of Veterinary Anesthesiology, Radiology, and Surgery
2Department of Veterinary Internal Medicine, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada

Tóm tắt

Objective—To determine the accuracy of three indirect blood pressure monitoring techniques (oscillometric technique [OS], Doppler [DOP], and optical plethysmography [OP] [blood pressure determined with a pulse oximeter waveform]) when compared with direct arterial pressure measurement in cats.Study Design—Prospective study.Animal Population—Eight healthy (five female, three male), domestic short‐hair cats, weighing 3.5 ± 0.8 kgMethods—Cats were anesthetized with isoflurane. The inspired concentration of isoflurane was adjusted to produce mild hypotension (80 to 100 mm Hg direct systolic), moderate hypotension (60 to 80 mm Hg direct systolic), and severe hypotension (<60 mm Hg direct systolic). Indirect pressure measurements were obtained from the thoracic limb and compared with concurrent direct measurement using regression analysis and a modification of Bland and Altman's technique.Results—All three techniques underestimated systolic pressure. OS produced the best prediction of systolic pressure with a bias ± precision of ‐15.9 ± 8.1 mm Hg. DOP and OP were relatively inaccurate with a bias ± precision of ‐25 ± 7.4 mm Hg and ‐25 ± 7.5 mm Hg. All three techniques correlated well with direct pressure with r values of 0.81, 0.88, and 0.88 for OS, DOP, and OP. DOP and OP provided an accurate prediction of direct mean arterial pressure with a bias ± precision of ‐0.8 ± 6 mm Hg and 0.6 ± 5.5 mm Hg. Correlation was good between DOP and mean arterial pressure with r = 0.89. Correlation was also good between OP and mean arterial pressure with r = 0.90.Conclusions—OS provided the most accurate prediction of direct systolic pressure. DOP and OP provided a good prediction of mean arterial pressure in the cat.Clinical Relevance—All three of these techniques are useful for detecting trends. Direct monitoring of blood pressure should be considered if accurate blood pressure measurement is required.

Từ khóa


Tài liệu tham khảo

Grandy JL, 1992, Evaluation of the doppler ultrasonic method of measuring systolic arterial blood pressure in cats, Am J Vet Res, 53, 1166, 10.2460/ajvr.1992.53.7.1166

10.1111/j.1939-1676.1995.tb03301.x

10.1213/00000539-199202000-00004

10.1213/00000539-198710000-00019

Caulkett NA, 1994, A comparison of systolic blood pressure measurement obtained using a pulse oximeter, and direct systolic pressure measurement in anesthetized sows, Can J Vet Res, 58, 144

10.1016/S0140-6736(86)90837-8

10.1097/00000542-199107000-00019

Bedford RT, 1995, Monitoring in Anesthesia and Critical Care Medicine, 95

Gains MJ, 1995, Comparison of direct and indirect pressure measurements in anesthetized dogs, Can J Vet Res, 59, 238

10.1093/bja/67.1.26

Thông tin
Thông tin xuất bản

Veterinary Surgery

Tập 27 Số 4

370-377

Thông tin tác giả