1
|
Chang JWH, Tromp TR, Joles JA, McBryde FD, Paton JFR, Ramchandra R. Role of the Carotid Body in an Ovine Model of Renovascular Hypertension. Hypertension 2020; 76:1451-1460. [PMID: 32981362 DOI: 10.1161/hypertensionaha.120.15676] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The carotid body is implicated as an important mediator and potential treatment target for hypertension. The mechanisms driving increased carotid body tonicity in hypertension are incompletely understood. Using a large preclinical animal model, which is crucial for translation, we hypothesized that carotid sinus nerve denervation would chronically decrease blood pressure in a renovascular ovine model of hypertension in which hypertonicity of the carotid body is associated with reduced common carotid artery blood flow. Adult ewes underwent either unilateral renal artery clipping or sham surgery. Two weeks later, flow probes were placed around the contralateral renal and common carotid arteries. Hypertension was accompanied by a significant reduction in common carotid blood flow but no change in renal blood flow. Carotid sinus nerve denervation significantly reduced blood pressure compared with sham. In both hypertensive and normotensive animals, carotid body stimulation using potassium cyanide caused dose-dependent increases in mean arterial pressure and common carotid conductance but a reduction in renal vascular conductance. These responses were not different between the animal groups. Taken together, our findings indicate that (1) the carotid body is activated in renovascular hypertension, and this is associated with reduced blood flow (decreased vascular conductance) in the common carotid artery and (2) the carotid body can differentially regulate blood flow to the common carotid and renal arteries. We suggest that in the ovine renovascular model, carotid body hypertonicity may be a product of reduced common carotid artery blood flow and plays an amplifying role with the kidney in the development of hypertension.
Collapse
Affiliation(s)
- Joshua Wen-Han Chang
- From the Department of Physiology, University of Auckland, New Zealand (J.W.-H.C., T.R.T., F.D.M., J.F.R.P., R.R.)
| | - Tycho R Tromp
- From the Department of Physiology, University of Auckland, New Zealand (J.W.-H.C., T.R.T., F.D.M., J.F.R.P., R.R.).,Department of Nephrology and Hypertension, University Medical Center Utrecht, the Netherlands (T.R.T., J.A.J.)
| | - Jaap A Joles
- Department of Nephrology and Hypertension, University Medical Center Utrecht, the Netherlands (T.R.T., J.A.J.)
| | - Fiona D McBryde
- From the Department of Physiology, University of Auckland, New Zealand (J.W.-H.C., T.R.T., F.D.M., J.F.R.P., R.R.)
| | - Julian F R Paton
- From the Department of Physiology, University of Auckland, New Zealand (J.W.-H.C., T.R.T., F.D.M., J.F.R.P., R.R.)
| | - Rohit Ramchandra
- From the Department of Physiology, University of Auckland, New Zealand (J.W.-H.C., T.R.T., F.D.M., J.F.R.P., R.R.)
| |
Collapse
|
2
|
Eghbalzadeh K, Guschlbauer M, Weber C, Wacker MT, Reinhardt S, Djordjevic I, Sabashnikov A, Maul A, Sterner-Kock A, Wahlers TCW, Scherner M, Wippermann J. Experimental Studies for Small Diameter Grafts in an In Vivo Sheep Model-Techniques and Pitfalls. Thorac Cardiovasc Surg 2019; 69:649-659. [PMID: 31030422 DOI: 10.1055/s-0039-1687887] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND Scientific attempts to create the "ideal" small diameter vascular graft have been compared with the "search of the holy grail." Prosthetic material as expanded polytetrafluoroethylene or Dacron shows acceptable patency rates to large caliber vessels, while small diameter (< 6 mm) prosthetic conduits present unacceptably poor patency rates. Vascular tissue engineering represents a promising option to address this problem. MATERIAL AND METHODS Thirty-two female Texel-sheep aged 6 months to 2 years underwent surgical common carotid artery (CCA) interposition using different tissue-engineered vascular substitutes. Explantation of the grafts was performed 12 (n = 12) and 36 (n = 20) weeks after surgery. Ultrasound was performed on postoperative day 1 and thereafter every 4 weeks to evaluate the graft patency. RESULTS The average length of implanted substitutes was 10.3 ± 2.2 cm. Anesthesia and surgical procedure could be performed without major surgical complications in all cases.The grafts showed a systolic blood flow velocity (BFV) of 28.24 ± 13.5 cm/s, a diastolic BFV of 9.25 ± 4.53 cm/s, and a mean BFV of 17.85 ± 9.25 cm/s. Native vessels did not differ relevantly in hemodynamic measurements (systolic: 29.77 cm/s; diastolic: 7.99 cm/s ± 5.35; mean 15.87 ± 10.75). There was no incidence of neurologic complications or subsequent postoperative occlusion. Perioperative morbidity was low and implantation of conduits was generally well tolerated. CONCLUSION This article aims to give a precise overview of in vivo experiments in sheep for the evaluation of small diameter vascular grafts performing CCA interposition, especially with regard to pitfalls and possible perioperative complications and to discuss advantages and disadvantages of this approach.
Collapse
Affiliation(s)
| | - Maria Guschlbauer
- Dezentrales Tierhaltungsnetzwerk, Universitätsklinikum Köln, Cologne, Germany
| | - Carolyn Weber
- Department of Cardiothoracic Surgery, Uniklinik Köln, Köln, Germany
| | - Max Theodor Wacker
- Department of Cardiac Surgery, Universitatsklinikum Magdeburg, Magdeburg, Germany
| | | | - Ilija Djordjevic
- Department of Cardiothoracic Surgery, Uniklinik Köln, Köln, Germany
| | | | - Alexandra Maul
- Department of Experimentelle Medizin, Universitätsklinikum Köln, Cologne, Germany
| | - Anja Sterner-Kock
- Department of Experimentelle Medizin, Universitätsklinikum Köln, Cologne, Germany
| | | | - Maximilian Scherner
- Department of Cardiac Surgery, Universitatsklinikum Magdeburg, Magdeburg, Germany
| | - Jens Wippermann
- Department of Cardiac Surgery, Universitatsklinikum Magdeburg, Magdeburg, Germany
| |
Collapse
|
3
|
Schleimer K, Jalaie H, Afify M, Woitok A, Barbati ME, Hoeft K, Jacobs M, Tolba RH, Steitz J. Sheep models for evaluation of novel patch and prosthesis material in vascular surgery: tips and tricks to avoid possible pitfalls. Acta Vet Scand 2018; 60:42. [PMID: 29976210 PMCID: PMC6034312 DOI: 10.1186/s13028-018-0397-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 06/27/2018] [Indexed: 11/25/2022] Open
Abstract
Background In vascular surgery, novel synthetic prosthesis materials for patch-angioplasties, interpositions, bypasses and shunts are continuously under development and optimization. The characteristics of an ideal vascular prosthesis would display long-term patency, biocompatibility, durability, low porosity, lack of stich hole bleeding, ease of handling, kink resistance, infection resistance and reasonable costs. The aim of this study was to establish and report a reliable sheep model including potential pitfalls where those parameters could be analyzed. Before surgery, sheep were acclimatized for 4–8 weeks, during which parasite infections were treated and blood and serum parameters monitored. Twenty-four sheep underwent surgery, and carotid patch-angioplasties (n = 12), graft interpositions (n = 6) or arteriovenous prosthetic shunts (n = 6) were implanted. Half of the animals in each group were sacrificed after 2 weeks and the other half after 8 weeks. The implants were analyzed for patency, endothelialization, thrombogenicity and biocompatibility by clinical observation, blood flow measurement and pathological and histopathological (H&E, EvG) as well as immunohistochemical (Ki67, CD31) evaluations. Results Health monitoring of the sheep revealed a parasitic burden with endoparasites in all animals. Some animals showed thereby infestations in the bile duct causing fibrotic cholangitis with calcifications in the liver. In addition, sarcosporidia were detected in histopathological specimen of the heart in all animals. Parasitic burden correlated with blood counts and serum bilirubin levels. Both were significantly reduced by albendazole treatment within the acclimatization time. Patches, interposition grafts, and straight shunts were successfully implanted bilaterally in all animals. The total average operation time was 136 ± 21 min. Most animals (23/24) showed good patency rates and general condition after implantation. Pathological and histopathological/immunohistochemical analyses were suitable to determine thrombogenicity, endothelialization, cellular/fibroblastic proliferation, biocompatibility, inflammatory cell infiltration, and thickness of neointima in the prosthesis material. Conclusions We have developed a suitable experimental protocol with standardized and successful anesthesia- and surgical-procedures for patch-angioplasty, graft interposition, and arteriovenous prosthetic shunts. This sheep model allows testing of new prosthetic materials for biocompatibility, thrombogenicity, and endothelialization.
Collapse
|
4
|
Podlaha J, Schwanhaeuser K, Kadeřábková T. Bilateral Common Carotid Artery Ligation in Sheep. Could These Animals be Used as Human Models for Vascular and Cerebral Research? ACTA VET-BEOGRAD 2018. [DOI: 10.1515/acve-2017-0038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Experimental animals are still used in today’s medicine to understand better physiological or pathological processes, or to develop, for example better vascular prostheses. For that reason, these animals must show some similarities with humans, from the anatomical to the physiological point of view. When developing vascular prostheses, we have to evaluate if the graft will react in the expected way and if during experimental research there will be some factors that might influence the proper functioning of vascular prostheses in the human body. We observed the consequences of bilateral common carotid artery ligation (BCCAL) or Sham operation in seventeen healthy Merinolandschaf / Württemberg sheep, aged between 2 and 4 years, after testing new types of carbon-coated ARTECOR® and ADIPOGRAFT Ra 1vk 7/350 vascular prostheses. After the follow-up period the prostheses were extirpated, so the blood supply was provided from the vertebral arteries. Sheep in both groups were not sacrificed, but were observed for 18 months. After the observation period all sheep showed no physical or neurological changes and all are still alive. Animal responses to BCCAL are different, depending on the animal species, age, and condition. In sheep, bilateral blocking of the blood fl ow in the carotid bed seems to be conceivable since the brain was sufficiently supplied with blood from the vertebral arteries.
Collapse
Affiliation(s)
- Jiří Podlaha
- Department of Surgery, University Hospital Brno Bohunice, Faculty of Medicine, Masaryk University, Brno , Czech Republic
| | - Kräuff Schwanhaeuser
- Department of Preventive Medicine / Public Health, Faculty of Medicine, Masaryk University, Brno , Czech Republic
| | - Tereza Kadeřábková
- Department of Anaesthesiology Resuscitation and Intensive Care Medicine, University Hospital Brno Bohunice, Brno , Czech Republic
| |
Collapse
|
5
|
Gibson TJ, Dadios N, Gregory NG. Effect of neck cut position on time to collapse in halal slaughtered cattle without stunning. Meat Sci 2015; 110:310-4. [PMID: 26264496 DOI: 10.1016/j.meatsci.2015.03.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 03/28/2015] [Accepted: 03/30/2015] [Indexed: 10/23/2022]
Abstract
This study examined the effect of neck cut position on the time to physical collapse in upright restrained halal slaughtered cattle (n = 644). Time to collapse was used as an indirect indicator of the early stages of onset of unconsciousness. Cattle were slaughtered with either a conventional low (LNC) (n=561) or a high neck cut (HNC) (n = 83). Mean time to final collapse was higher in the LNC compared to HNC group (18.9 ± 1.1s and 13.5 ± 1.3s respectively (P < 0.01)). The mean false aneurysm scores were higher in the LNC cattle (0.8 ± 0.0) compared to the HNC (0.6 ± 0.1) (P < 0.01). Animals that took > 20s to final collapse had larger false aneurysms. In summary, the HNC reduced the mean time to final collapse and the frequency of animals that took longer than 20s to collapse.
Collapse
Affiliation(s)
- Troy J Gibson
- Department of Production and Population Health, Royal Veterinary College, Hawkshead Lane, Hatfield AL9 7TA, United Kingdom.
| | - Nikolaos Dadios
- Department of Production and Population Health, Royal Veterinary College, Hawkshead Lane, Hatfield AL9 7TA, United Kingdom
| | - Neville G Gregory
- Department of Production and Population Health, Royal Veterinary College, Hawkshead Lane, Hatfield AL9 7TA, United Kingdom
| |
Collapse
|
6
|
Byrom MJ, Bannon PG, White GH, Ng MKC. Animal models for the assessment of novel vascular conduits. J Vasc Surg 2010; 52:176-95. [PMID: 20299181 DOI: 10.1016/j.jvs.2009.10.080] [Citation(s) in RCA: 130] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Revised: 09/25/2009] [Accepted: 10/04/2010] [Indexed: 11/19/2022]
Abstract
The development of an ideal small-diameter conduit for use in vascular bypass surgery has yet to be achieved. The ongoing innovation in biomaterial design generates novel conduits that require preclinical assessment in vivo, and a number of animal models have been used for this purpose. This article examines the rationale behind animal models used in the assessment of small-diameter vascular conduits encompassing the commonly used species: baboons, sheep, pigs, dogs, rabbits, and rodents. Studies on the comparative hematology for these species relative to humans are summarized, and the hydrodynamic values for common implant locations are also compared. The large- and small-animal models are then explored, highlighting the characteristics of each that determine their relative utility in the assessment of vascular conduits. Where possible, the performance of expanded polytetrafluoroethylene is given in each animal and in each location to allow direct comparisons between species. New challenges in animal modeling are outlined for the assessment of tissue-engineered graft designs. Finally, recommendations are given for the selection of animal models for the assessment of future vascular conduits.
Collapse
|
7
|
|
8
|
Comparison of Halal slaughter with captive bolt stunning and neck cutting in cattle: exsanguination and quality parameters. Anim Welf 2006. [DOI: 10.1017/s0962728600030645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
AbstractSome supporters of religious slaughter methods claim that efficiency of bleed-out is adversely affected by stunning. Our previous study carried out in sheep at an abattoir comparing the Muslim method of slaughter without stunning with pre-slaughter stunning using a captive bolt or by electrical methods concluded that bleed-out is not adversely affected by stunning, nor improved by a neck cut without stunning. In this paper, a similar study carried out in cattle is reported. In this study, captive bolt stunning followed by neck cutting was compared with the Muslim slaughter method without stunning. The total blood loss, percentage blood loss expressed as a percentage of live weight and percentage loss of estimated total blood were calculated and compared between each group. In addition, the time periods taken to reach 25, 50, 75 and 90% of total blood loss were also calculated. There was no significant difference between the two stunning groups for any of these blood loss variables. The results, subjected to statistical analyses, also showed no apparent difference in the PCV levels and meat quality parameters between treatments. These results confirm the findings with sheep and show that the bleed-out is not adversely affected by captive bolt stunning, nor improved by a neck cut without stunning in cattle. It is anticipated that these findings may help promote the use of stunning methods during Halal slaughter.
Collapse
|
9
|
|
10
|
Abstract
Blood supplying the brain in vertebrates is carried primarily by the carotid vasculature. In most mammals, cerebral blood flow is supplemented by the vertebral arteries, which anastomose with the carotids at the base of the brain. In other tetrapods, cerebral blood is generally believed to be supplied exclusively by the carotid vasculature, and the vertebral arteries are usually described as disappearing into the dorsal musculature between the heart and head. There have been several reports of a vertebral artery connection with the cephalic vasculature in snakes. We measured regional blood flows using fluorescently labeled microspheres and demonstrated that the vertebral artery contributes a small but significant fraction of cerebral blood flow (approximately 13% of total) in the rat snake Elaphe obsoleta. Vascular casts of the anterior vessels revealed that the vertebral artery connection is indirect, through multiple anastomoses with the inferior spinal artery, which connects with the carotid vasculature near the base of the skull. Using digital subtraction angiography, fluoroscopy, and direct observations of flow in isolated vessels, we confirmed that blood in the inferior spinal artery flows craniad from a point anterior to the vertebral artery connections. Such collateral blood supply could potentially contribute to the maintenance of cerebral circulation during circumstances when craniad blood flow is compromised, e.g., during the gravitational stress of climbing.
Collapse
Affiliation(s)
- K C Zippel
- Department of Zoology, University of Florida, Gainesville 32611, USA
| | | | | |
Collapse
|
11
|
Abstract
The effect of a single ligature on back pressure in the internal carotid artery was studied in nine horses. In six anesthetized horses, one internal carotid artery was catheterized 2 cm from its origin and blood pressure was recorded continuously. Then the artery was ligated, pressure was recorded again, and the horses were euthanatized. In another three anesthetized horses, indwelling catheters were placed in both internal carotid arteries and a loose ligature was placed proximal to one catheter. After horses recovered from anesthesia, the ligature was tied and blood pressure was recorded in both arteries on that day and 3 days later, then these horses were euthanatized. The anatomy of the cerebral arteries was examined in all nine horses. Blood pressure in the internal carotid arteries did not change after ligation. Subjectively, collateral channels considered most likely to maintain blood pressure in the ligated internal carotid artery were the caudal intercarotid artery and the cerebral arterial circle. We concluded that ligation of the internal carotid artery would not prevent severe hemorrhage from the internal carotid artery in horses with guttural pouch mycosis until the ligated artery thrombosed to the level of the lesion.
Collapse
Affiliation(s)
- D E Freeman
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, New Bolton Center, Kennett Square
| | | | | |
Collapse
|
12
|
Kimani JK, Opole IO. The structural organization and adrenergic innervation of the carotid arterial system of the giraffe (Giraffa camelopardalis). Anat Rec (Hoboken) 1991; 230:369-77. [PMID: 1867411 DOI: 10.1002/ar.1092300310] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The sympathetic innervation of the giraffe (Giraffa camelopardalis) carotid arterial system is described in this study using the sucrose-potassium phosphate-glyoxylic acid (SPG) method. The brachiocephalic and bicarotid trunks showed a paucity of sympathetic innervation. Smooth muscle nests observed in the outer layers of the tunica media in these arteries revealed a rich network of sympathetic nerve fibres. The common carotid artery showed numerous sympathetic nerve fibres particularly in the outer muscular zone of the tunica media. The internal maxillary, ramus anastomoticus, and arteria anastomotica also revealed a rich sympathetic innervation and a deep penetration of the nerve fibres into the tunica media. It is suggested that the rich sympathetic innervation of the giraffe carotid arteries maintains a basal tonic state in the smooth muscle in the tunica media. This, in turn, may enable the animal to maintain a relatively high rate of blood flow in the carotid arteries in diastole despite the pressure run-off. It is further suggested that the muscular structure and dense sympathetic innervation of the internal maxillary and its branches to the carotid rete mirabile provide the animal with an array of mechanisms to modulate its cranial circulation particularly when it bends its head to drink.
Collapse
Affiliation(s)
- J K Kimani
- Department of Human Anatomy, University of Nairobi, Kenya
| | | |
Collapse
|
13
|
Kimani JK. Structural organization of the vertebral artery in the giraffe (Giraffa camelopardalis). Anat Rec (Hoboken) 1987; 217:256-62. [PMID: 3578841 DOI: 10.1002/ar.1092170306] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Vertebral arteries in the giraffe were removed and their structural organization was studied with light microscopy. It has been shown that the caudal segment of the vertebral artery extending to the level of the seventh cervical vertebra has a largely elastic structure, while the cranial segment has a muscular structure. The transition of the arterial wall normally occurs between the seventh and fifth cervical vertebral levels, and involves diminution of elastic tissue in the luminal portion of the tunica media and simultaneous increase of the smooth muscle content. The smooth muscle cells in the cranial portion show a clustered arrangement consisting of several smooth muscle fibres. The individual clusters are separated by connective tissue septa from which finer strands extend to surround individual muscle fibres. It is suggested that the vertebral and carotid arteries though found in the neck have a different structural organization, which, in turn, may imply that the two blood vessels are subjected to different haemodynamic demands. The findings of this study therefore render further support to the statement that the largely muscular structure of the common carotid artery in the giraffe may be related to the unique cerebral haemodynamics of this animal, rather than being a common feature of the blood vessels situated in the neck. A corollary to this suggestion is the fact that, in the giraffe, as in most other Artiodactyls, the vertebral blood does not participate in the supply of cephalic structures because it is confined to the cervical region by the pressure barrier in the carotid-vertebral anastomosis.
Collapse
|
14
|
Godynicki S, Schwarz R, Radke B. [Micromorphology of the epidural rostral rete mirabile and the sinus cavernosus of sheep (Ovis aries)]. Anat Histol Embryol 1981; 10:227-37. [PMID: 6457537 DOI: 10.1111/j.1439-0264.1981.tb00520.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
15
|
Kumar AJ, Hochwald GM, Kricheff I. An angiographic study of the carotid arterial and jugular venous systems in the cat. THE AMERICAN JOURNAL OF ANATOMY 1976; 145:357-69. [PMID: 1266773 DOI: 10.1002/aja.1001450305] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Standard techniques for performing carotid angiography in dogs and in man were adapted to the cat in order to study the vascularization of both intracranial and extracranial structures. Venous drainage was examined by venography of selected vessels. The carotid-cerebral and the vertebral-basilar arterial systems of the cat were studied, although no attempt was made to define the territory supplied by each system. In serial angiograms, vascularization of the rete mirabile conjugatum was visualized and distinct arterial and venous retia were delineated. Large facial veins were seen approximately one second after the intra-arterial injection of radio-contrast material. The early filling of the large facial veins appeared to be the result of an artery-to-venous shunt. Contrast material flowed posteriorly in these veins and drained into the venous rete. When contrast material was injected either into the sagittal sinus or retrograde in the external jugular vein, the internal jugular vein was visible in four of ten cats. This vessel drained blood directly from intracranial contents before anastomosis with the vertebral and external jugular veins.
Collapse
|
16
|
|
17
|
Gillan LA. Blood supply to brains of ungulates with and without a rete mirabile caroticum. J Comp Neurol 1974; 153:275-90. [PMID: 4817350 DOI: 10.1002/cne.901530305] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
18
|
Cordoş D, Tomuş L, Banu V, Rusu M, Daniello R, Iancu P, Taloş D. Influence of cerebral ischemia on the development of experimental atherosclerosis in the rabbit. Atherosclerosis 1971; 13:267-81. [PMID: 5560882 DOI: 10.1016/0021-9150(71)90029-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
19
|
Baldwin BA, Soltysik SS. The effect of cerebral ischeaemia or intracarotid injection of methohexitone on short term memory in goats. Brain Res 1969; 16:105-20. [PMID: 5348843 DOI: 10.1016/0006-8993(69)90088-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
20
|
Richards SA, Sykes AH. Responses of the domestic fowl (Gallus domesticus) to occlusion of the cervical arteries and veins. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY 1967; 21:39-50. [PMID: 6033842 DOI: 10.1016/0010-406x(67)90112-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
21
|
Baldwin BA, Soltysik SS. The effect of cerebral ischaemia, resulting in loss of EEG, on the acquisition of conditioned reflexes in goats. Brain Res 1966; 2:71-84. [PMID: 5965636 DOI: 10.1016/0006-8993(66)90063-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
22
|
Baldwin BA. Electroencephalography in Animals [ Abridged]. Proc R Soc Med 1965. [DOI: 10.1177/003591576505800731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- B A Baldwin
- ARC Institute of Animal Physiology, Babraham, Cambridge
| |
Collapse
|
23
|
KNAPP FM, MITCHELL WK, HIMWICH WA. Measurement of basilar and vertebral arterial pressures in the dog. Life Sci 1965; 4:251-9. [PMID: 14283085 DOI: 10.1016/0024-3205(65)90125-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
24
|
BALDWIN BA, BELL FR. The effect of temporary reduction in cephalic blood flow on the EEG of sheep and calf. ACTA ACUST UNITED AC 1963; 15:465-75. [PMID: 14143768 DOI: 10.1016/0013-4694(63)90067-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|