The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
Andrew W. Trites - One of the best experts on this subject based on the ideXlab platform.
-
THE RELIABILITY OF SKINFOLD‐Calipers FOR MEASURING BLUBBER THICKNESS OF STELLER SEA LION PUPS (EUMETOPIAS JUBATUS)
Marine Mammal Science, 2000Co-Authors: Remco A. H. Jonker, Andrew W. TritesAbstract:Twelve dead Steller sea lion pups (Eumetopias jubatus) aged 3-14 d were recovered from rookeries in Southeast Alaska. They had a wide range of body sizes and conditions (small to large and fat to no fat). The ability of Calipers to estimate the thickness of their blubber layer was assessed with a set of skinfold Calipers. Average error of measurement for skin and blubber thickness was an acceptable 5.4%, but the skin and blubber of the pups were highly compressible. Skinfold thickness increased with body mass but did not necessarily reflect the development of blubber, given that pups with no blubber also showed an increase in skinfold thickness with increases in body mass. Skinfold thickness of sea lion pups appears to predict body size better than it predicts blubber thickness, making it difficult if not impossible to develop a simple index of body condition or a calculation of percent body fat for Steller sea lion pups from skinfold caliper measurements.
-
the reliability of skinfold Calipers for measuring blubber thickness of steller sea lion pups eumetopias jubatus
Marine Mammal Science, 2000Co-Authors: Remco A. H. Jonker, Andrew W. TritesAbstract:Twelve dead Steller sea lion pups (Eumetopias jubatus) aged 3-14 d were recovered from rookeries in Southeast Alaska. They had a wide range of body sizes and conditions (small to large and fat to no fat). The ability of Calipers to estimate the thickness of their blubber layer was assessed with a set of skinfold Calipers. Average error of measurement for skin and blubber thickness was an acceptable 5.4%, but the skin and blubber of the pups were highly compressible. Skinfold thickness increased with body mass but did not necessarily reflect the development of blubber, given that pups with no blubber also showed an increase in skinfold thickness with increases in body mass. Skinfold thickness of sea lion pups appears to predict body size better than it predicts blubber thickness, making it difficult if not impossible to develop a simple index of body condition or a calculation of percent body fat for Steller sea lion pups from skinfold caliper measurements.
Remco A. H. Jonker - One of the best experts on this subject based on the ideXlab platform.
-
THE RELIABILITY OF SKINFOLD‐Calipers FOR MEASURING BLUBBER THICKNESS OF STELLER SEA LION PUPS (EUMETOPIAS JUBATUS)
Marine Mammal Science, 2000Co-Authors: Remco A. H. Jonker, Andrew W. TritesAbstract:Twelve dead Steller sea lion pups (Eumetopias jubatus) aged 3-14 d were recovered from rookeries in Southeast Alaska. They had a wide range of body sizes and conditions (small to large and fat to no fat). The ability of Calipers to estimate the thickness of their blubber layer was assessed with a set of skinfold Calipers. Average error of measurement for skin and blubber thickness was an acceptable 5.4%, but the skin and blubber of the pups were highly compressible. Skinfold thickness increased with body mass but did not necessarily reflect the development of blubber, given that pups with no blubber also showed an increase in skinfold thickness with increases in body mass. Skinfold thickness of sea lion pups appears to predict body size better than it predicts blubber thickness, making it difficult if not impossible to develop a simple index of body condition or a calculation of percent body fat for Steller sea lion pups from skinfold caliper measurements.
-
the reliability of skinfold Calipers for measuring blubber thickness of steller sea lion pups eumetopias jubatus
Marine Mammal Science, 2000Co-Authors: Remco A. H. Jonker, Andrew W. TritesAbstract:Twelve dead Steller sea lion pups (Eumetopias jubatus) aged 3-14 d were recovered from rookeries in Southeast Alaska. They had a wide range of body sizes and conditions (small to large and fat to no fat). The ability of Calipers to estimate the thickness of their blubber layer was assessed with a set of skinfold Calipers. Average error of measurement for skin and blubber thickness was an acceptable 5.4%, but the skin and blubber of the pups were highly compressible. Skinfold thickness increased with body mass but did not necessarily reflect the development of blubber, given that pups with no blubber also showed an increase in skinfold thickness with increases in body mass. Skinfold thickness of sea lion pups appears to predict body size better than it predicts blubber thickness, making it difficult if not impossible to develop a simple index of body condition or a calculation of percent body fat for Steller sea lion pups from skinfold caliper measurements.
A C Yeung - One of the best experts on this subject based on the ideXlab platform.
-
Accuracy of electronic digital Calipers compared with quantitative angiography in measuring coronary arterial diameter.
Circulation, 1993Co-Authors: A Uehata, T Matsuguchi, J A Bittl, J Orav, I T Meredith, T J Anderson, A P Selwyn, P Ganz, A C YeungAbstract:Quantitative angiography is the accepted method for measuring coronary luminal diameter. Electronic digital Calipers have been used to assess arterial diameters in vasomotor function studies and after interventional procedures. However, careful validation of Calipers against quantitative angiography has not been described. We used digital Calipers and quantitative angiography to measure 517 arterial diameters (88 nonstenotic segments) in 24 transplant patients undergoing vasomotor function studies with acetylcholine and nitroglycerin, 20 stenoses in 14 patients with coronary artery disease, and 15 stenoses in 15 patients before and after excimer laser-facilitated coronary angioplasty and at 6 months' follow-up. In nonstenotic arterial segments ranging in size from 0.6 to 3.5 mm, Calipers overestimated diameters measured by quantitative angiography by 0.29 +/- 0.21 mm (mean +/- SD) (limits of agreement, -0.13 to 0.71 mm). However, when the vasomotor responses were expressed as percent diameter change, the two methods did not differ significantly (-1 +/- 10%; limits of agreement, -21% to 19%). In the 35 stenoses measured before intervention and 30 stenoses measured after intervention, Calipers and quantitative angiography differed by 3 +/- 9% (limits of agreement, -15% to 21%) across a range of stenosis severity (11% to 80%). Repeat caliper measurements by the same observer of the percent diameter change in the transplant patients and the percent stenosis in the coronary artery disease patients led to standard deviations of the differences of 9.3% and 7.6%, respectively. Two different observers recorded percent diameter change and percent stenosis that differed with standard deviations of 9.6% and 7.8%, respectively. Quantitative angiography and electronic digital Calipers produce similar relative changes in arterial diameters and percent stenosis in a broad range of severities. Digital Calipers thus are a rapid and convenient alternative to computerized quantitative angiography in certain research studies and clinical practice of assessing stenosis severity.
-
Accuracy of electronic digital Calipers compared with quantitative angiography in measuring coronary arterial diameter.
Circulation, 1993Co-Authors: A Uehata, T Matsuguchi, J A Bittl, J Orav, I T Meredith, T J Anderson, A P Selwyn, P Ganz, A C YeungAbstract:BACKGROUNDQuantitative angiography is the accepted method for measuring coronary luminal diameter. Electronic digital Calipers have been used to assess arterial diameters in vasomotor function studies and after interventional procedures. However, careful validation of Calipers against quantitative angiography has not been described.METHODS AND RESULTSWe used digital Calipers and quantitative angiography to measure 517 arterial diameters (88 nonstenotic segments) in 24 transplant patients undergoing vasomotor function studies with acetylcholine and nitroglycerin, 20 stenoses in 14 patients with coronary artery disease, and 15 stenoses in 15 patients before and after excimer laser-facilitated coronary angioplasty and at 6 months' follow-up. In nonstenotic arterial segments ranging in size from 0.6 to 3.5 mm, Calipers overestimated diameters measured by quantitative angiography by 0.29 +/- 0.21 mm (mean +/- SD) (limits of agreement, -0.13 to 0.71 mm). However, when the vasomotor responses were expressed as p...
A Uehata - One of the best experts on this subject based on the ideXlab platform.
-
Accuracy of electronic digital Calipers compared with quantitative angiography in measuring coronary arterial diameter.
Circulation, 1993Co-Authors: A Uehata, T Matsuguchi, J A Bittl, J Orav, I T Meredith, T J Anderson, A P Selwyn, P Ganz, A C YeungAbstract:Quantitative angiography is the accepted method for measuring coronary luminal diameter. Electronic digital Calipers have been used to assess arterial diameters in vasomotor function studies and after interventional procedures. However, careful validation of Calipers against quantitative angiography has not been described. We used digital Calipers and quantitative angiography to measure 517 arterial diameters (88 nonstenotic segments) in 24 transplant patients undergoing vasomotor function studies with acetylcholine and nitroglycerin, 20 stenoses in 14 patients with coronary artery disease, and 15 stenoses in 15 patients before and after excimer laser-facilitated coronary angioplasty and at 6 months' follow-up. In nonstenotic arterial segments ranging in size from 0.6 to 3.5 mm, Calipers overestimated diameters measured by quantitative angiography by 0.29 +/- 0.21 mm (mean +/- SD) (limits of agreement, -0.13 to 0.71 mm). However, when the vasomotor responses were expressed as percent diameter change, the two methods did not differ significantly (-1 +/- 10%; limits of agreement, -21% to 19%). In the 35 stenoses measured before intervention and 30 stenoses measured after intervention, Calipers and quantitative angiography differed by 3 +/- 9% (limits of agreement, -15% to 21%) across a range of stenosis severity (11% to 80%). Repeat caliper measurements by the same observer of the percent diameter change in the transplant patients and the percent stenosis in the coronary artery disease patients led to standard deviations of the differences of 9.3% and 7.6%, respectively. Two different observers recorded percent diameter change and percent stenosis that differed with standard deviations of 9.6% and 7.8%, respectively. Quantitative angiography and electronic digital Calipers produce similar relative changes in arterial diameters and percent stenosis in a broad range of severities. Digital Calipers thus are a rapid and convenient alternative to computerized quantitative angiography in certain research studies and clinical practice of assessing stenosis severity.
-
Accuracy of electronic digital Calipers compared with quantitative angiography in measuring coronary arterial diameter.
Circulation, 1993Co-Authors: A Uehata, T Matsuguchi, J A Bittl, J Orav, I T Meredith, T J Anderson, A P Selwyn, P Ganz, A C YeungAbstract:BACKGROUNDQuantitative angiography is the accepted method for measuring coronary luminal diameter. Electronic digital Calipers have been used to assess arterial diameters in vasomotor function studies and after interventional procedures. However, careful validation of Calipers against quantitative angiography has not been described.METHODS AND RESULTSWe used digital Calipers and quantitative angiography to measure 517 arterial diameters (88 nonstenotic segments) in 24 transplant patients undergoing vasomotor function studies with acetylcholine and nitroglycerin, 20 stenoses in 14 patients with coronary artery disease, and 15 stenoses in 15 patients before and after excimer laser-facilitated coronary angioplasty and at 6 months' follow-up. In nonstenotic arterial segments ranging in size from 0.6 to 3.5 mm, Calipers overestimated diameters measured by quantitative angiography by 0.29 +/- 0.21 mm (mean +/- SD) (limits of agreement, -0.13 to 0.71 mm). However, when the vasomotor responses were expressed as p...
T Matsuguchi - One of the best experts on this subject based on the ideXlab platform.
-
Accuracy of electronic digital Calipers compared with quantitative angiography in measuring coronary arterial diameter.
Circulation, 1993Co-Authors: A Uehata, T Matsuguchi, J A Bittl, J Orav, I T Meredith, T J Anderson, A P Selwyn, P Ganz, A C YeungAbstract:Quantitative angiography is the accepted method for measuring coronary luminal diameter. Electronic digital Calipers have been used to assess arterial diameters in vasomotor function studies and after interventional procedures. However, careful validation of Calipers against quantitative angiography has not been described. We used digital Calipers and quantitative angiography to measure 517 arterial diameters (88 nonstenotic segments) in 24 transplant patients undergoing vasomotor function studies with acetylcholine and nitroglycerin, 20 stenoses in 14 patients with coronary artery disease, and 15 stenoses in 15 patients before and after excimer laser-facilitated coronary angioplasty and at 6 months' follow-up. In nonstenotic arterial segments ranging in size from 0.6 to 3.5 mm, Calipers overestimated diameters measured by quantitative angiography by 0.29 +/- 0.21 mm (mean +/- SD) (limits of agreement, -0.13 to 0.71 mm). However, when the vasomotor responses were expressed as percent diameter change, the two methods did not differ significantly (-1 +/- 10%; limits of agreement, -21% to 19%). In the 35 stenoses measured before intervention and 30 stenoses measured after intervention, Calipers and quantitative angiography differed by 3 +/- 9% (limits of agreement, -15% to 21%) across a range of stenosis severity (11% to 80%). Repeat caliper measurements by the same observer of the percent diameter change in the transplant patients and the percent stenosis in the coronary artery disease patients led to standard deviations of the differences of 9.3% and 7.6%, respectively. Two different observers recorded percent diameter change and percent stenosis that differed with standard deviations of 9.6% and 7.8%, respectively. Quantitative angiography and electronic digital Calipers produce similar relative changes in arterial diameters and percent stenosis in a broad range of severities. Digital Calipers thus are a rapid and convenient alternative to computerized quantitative angiography in certain research studies and clinical practice of assessing stenosis severity.
-
Accuracy of electronic digital Calipers compared with quantitative angiography in measuring coronary arterial diameter.
Circulation, 1993Co-Authors: A Uehata, T Matsuguchi, J A Bittl, J Orav, I T Meredith, T J Anderson, A P Selwyn, P Ganz, A C YeungAbstract:BACKGROUNDQuantitative angiography is the accepted method for measuring coronary luminal diameter. Electronic digital Calipers have been used to assess arterial diameters in vasomotor function studies and after interventional procedures. However, careful validation of Calipers against quantitative angiography has not been described.METHODS AND RESULTSWe used digital Calipers and quantitative angiography to measure 517 arterial diameters (88 nonstenotic segments) in 24 transplant patients undergoing vasomotor function studies with acetylcholine and nitroglycerin, 20 stenoses in 14 patients with coronary artery disease, and 15 stenoses in 15 patients before and after excimer laser-facilitated coronary angioplasty and at 6 months' follow-up. In nonstenotic arterial segments ranging in size from 0.6 to 3.5 mm, Calipers overestimated diameters measured by quantitative angiography by 0.29 +/- 0.21 mm (mean +/- SD) (limits of agreement, -0.13 to 0.71 mm). However, when the vasomotor responses were expressed as p...
