The nervous control of gingival blood flow in cats

Reports of cardiovascular responses to head-stand posture are lacking in literature. The results of the various responses, respectively, to the supine, erect, and head-stand posture, are as follows: heart rate/min 67, 84, and 69; brachial arterial pressure mm Hg 92, 90, and 108; posterior tibial arterial pressure mm Hg 98, 196, and 10; finger blood flow ml/100 ml min 4.5, 4.4, and 5.2; toe blood flow ml/100 ml min 7.1, 8.1, and 3.4; forehead skin temperature C 34.4, 34.0 and 34.3; dorsum foot skin temperature C 28.6, 28.2, and 28.2. It is inferred that the high-pressure-capacity vessels between the heart level and posterior tibial artery have little nervous control. The high-pressure baroreceptors take active part in postural adjustments of circulation. The blood pressure equating mechanism is not as efficient when vital tissues are pooled with blood as when blood supply to them is reduced. man; heart rate; blood flow; skin temperature Submitted on January 3, 1963

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A laser Doppler study of gingival blood flow variations following periosteal stimulation

Journal Of Clinical Periodontology ◽

10.1034/j.1600-051x.2002.290203.x ◽

2002 ◽

Vol 29 (2) ◽

pp. 103-107 ◽

Cited By ~ 9

Author(s):

Pascal Ambrosini ◽

Sabine Cherene ◽

Neal Miller ◽

Michel Weissenbach ◽

Jacques Penaud

Keyword(s):

Blood Flow ◽

Laser Doppler ◽

Doppler Study ◽

Gingival Blood Flow

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The Effect of Dexmedetomidine on Oral Mucosal Blood Flow and the Absorption of Lidocaine

Anesthesia Progress ◽

10.2344/anpr-65-03-02 ◽

2018 ◽

Vol 65 (3) ◽

pp. 168-176 ◽

Cited By ~ 1

Author(s):

Shu Tomita ◽

Shinya Yamazaki ◽

Kohei Togami ◽

Hitoshi Tada ◽

Hiroyoshi Kawaai

Keyword(s):

Blood Flow ◽

General Anesthesia ◽

Oral Surgery ◽

Mucosal Blood Flow ◽

Stressful Events ◽

Gingival Blood Flow ◽

Lidocaine Concentration ◽

Infusion Experiment ◽

The Relationship ◽

Adrenergic Fibers

Dexmedetomidine (DEX) is a sedative and analgesic agent that acts via the alpha-2 adrenoreceptor and is associated with reduced anesthetic requirements, as well as attenuated blood pressure and heart rate in response to stressful events. A previous study reported that cat gingival blood flow was controlled via sympathetic alpha-adrenergic fibers involved in vasoconstriction. In the present study, experiment 1 focused on the relationship between the effects of DEX on alpha adrenoreceptors and vasoconstriction in the tissues of the oral cavity and compared the palatal mucosal blood flow (PMBF) in rabbits between general anesthesia with sevoflurane and sedation with DEX. We found that the PMBF was decreased by DEX presumably because of the vasoconstriction of oral mucosal vessels following alpha-2 adrenoreceptor stimulation by DEX. To assess if this vasoconstriction would allow decreased use of locally administered epinephrine during DEX infusion, experiment 2 in the present study monitored the serum lidocaine concentration in rabbits to compare the absorption of lidocaine without epinephrine during general anesthesia with sevoflurane and sedation with DEX. The depression of PMBF by DEX did not affect the absorption of lidocaine. We hypothesize that this is because lidocaine dilates the blood vessels, counteracting the effects of DEX. In conclusion, despite decreased palatal blood flow with DEX infusion, local anesthetics with vasoconstrictors should be used in implant and oral surgery even with administered DEX.

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