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Dive into the research topics where Toshimitsu Kitajima is active.

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Featured researches published by Toshimitsu Kitajima.


Anesthesia & Analgesia | 1997

The effect of epidural saline injection on analgesic level during combined spinal and epidural anesthesia assessed clinically and myelographically

Tetsuo Takiguchi; Takatoshi Okano; Hirotoshi Egawa; Yoshinori Okubo; Kyoko Saito; Toshimitsu Kitajima

An epidural injection of physiological saline solution after spinal anesthesia may produce a higher level of analgesia than spinal anesthesia alone because of a volume effect.The purpose of this study was to clarify the volume effect caused by epidural injection of saline after spinal anesthesia. Twenty patients undergoing combined spinal and epidural anesthesia for elective surgery whose analgesic levels did not reach the surgical regions 10 min after spinal anesthesia at the L4-5 interspace were randomly assigned to two groups. The control group (n = 10) received no epidural saline injection. The saline group (n = 10) received 10 mL of saline through an epidural catheter at the L2-3 or L3-4 interspace 10 min after spinal anesthesia. In the saline group, the levels of analgesia 15 and 20 min after spinal anesthesia were significantly higher than those in the control group (P < 0.05). Next, we examined the volume effect of epidural injection of saline with myelography using two adult volunteers. In both volunteers, the upper level of the contrast medium, which was injected in the lumbar subarachnoid space, began to increase concurrently with lumbar epidural injection of saline, reaching from L3 to L1 and from L2 to T12. The diameter of the subarachnoid space diminished to less than 25% after injection of saline. We conclude that lumbar epidural injection of saline increases the analgesic level 10 min after spinal anesthesia, probably because of a volume effect. Implications: In this study, using surgical patients and volunteers, we determined that a lumbar epidural injection of physiological saline solution 10 min after spinal anesthesia produces a higher analgesic level than spinal anesthesia alone because of a volume effect. (Anesth Analg 1997;85:1097-100)


Canadian Journal of Anaesthesia-journal Canadien D Anesthesie | 2000

Propofol prevents lipid peroxidation following transient forebrain ischemia in gerbils

Shigeki Yamaguchi; Shinsuke Hamaguchi; Mutsuo Mishio; Okuda Y; Toshimitsu Kitajima

Purpose: To ascertain whether propofol prevents lipid peroxidation on delayed neuronal death induced by transient forebrain ischemia in the hippocampal CAI subfield in gerbils.Methods: Forty gerbils were randomly assigned to five groups: Group I, control, sham operation treated with physiological saline solution (PSS); Group II, ischemia/reperfusion treated with PSS; Group III, ischemia/reperfusion treated with 50 mg·kg−1 propofol; Group IV, ischemia/reperfusion treated with 100 mg·kg−1 propofol; Group V, ischemia/reperfusion treated with 150 mg·kg−1 propofol. Transient forebrain ischemia was induced by occluding the bilateral common carotid arteries for four minutes under N2O/O2/halothane anesthesia after propofol or PSS. Five days later, the cerebrum was removed and each forebrain was cut into two including the hippocampus. Lipid peroxidation was determined using the production of malondialdehyde (MDA), and histopathological changes in the hippocampal CAI subfield were examined.Results: In group II, the pyramidal cells were atrophic and pycnotic, vacuolation and structural disruption of the radial striated zone was observed. In the other four groups, these changes were not observed. Degenerative ratios of pyramidal cells were: Group I: 4.9±2.3, Group II: 94.1±4.5 (P<0.01), Group III: 12.5±5.7, Group IV: 11.0±4.6, Group V: 9.6±4.9%. Production of MDA was: Group I: 83±22, Group II: 198±25 (P<0.01), Group III: 153±39, Group IV: 113±34, Group V: 106±27 nmol·g−1 wet tissue.Conclusion: Propofol attenuated delayed neuronal death by preventing lipid peroxidation induced by transient forebrain ischemia in the hippocampal CAI subfield in gerbils.RésuméObjectif: Vérfier si le propofol empêche la peroxydation lipidique qui survient à la mort neuronale différée induite par une ischémie transitoire du prosencéphale, dans le sous-champ CAI de l’hippocampe chez des gerbilles.Méthode: On a réparti au hasard 40 gerbilles en cinq groupes: dans le groupe I, témoin, elles ont subi une opération fictive traitée avec une solution physiologique salée (SPS); dans le groupe II, une ischémie/reperfusion traitée avec une SPS; dans le groupe III, une ischémie/reperfusion traitée avec 50 mg·kg−1 de propofol; dans le groupe IV, une ischémie/reperfusion traitée avec 100 mg·kg−1 de propofol et dans le groupe V, une ischémie/reperfusion traitée avec 150 mg·kg−1 de propofol. L’ischémie transitoire du cerveau antérieur a été induite par l’occlusion bilatérale des artères carotides communes pendant quatre minutes sous anesthésie au N2O/O2/halothane après l’administration de propofol ou de SPS. Cinq minutes plus tard, le cerveau a été retiré et chaque prosencéphale a été coupé en deux, induant l’hippocampe. La peroxydation lipidique a été déterminée en utilisant la production de malondialdéhyde (MDA), et les changements histopathologiques du sous-champ CAI de l’hippocampe ont été examinés.Résultats: Dans le groupe II, les cellules pyramidales étaient atrophiques et pycnotiques; une rupture vacuolaire et structurale de la zone radiale striée a été observée. Dans les autres groupes, ces changements n’ont pas été notés. Les taux de cellules pyramidales dégénératives ont été: groupe I: 5,8±2,5 %, groupe II: 94,1±4,5 (P<0,01), groupe III: 12,5±5,7 %, group IV: 11,0±4,6 %, groupe V: 9,4±6,6 %. La production de MDA a été dans le groupe I: 83±22, II: 198±25 (P<0,01), III: 153±39, IV: 113±34 et V: 106±27 nmol·g−1 de tissu.Conclusion: Le propofol a réduit la mort neuronale différée en empêchant la peroxydation lipidique induite par l’ischémie transitoire du prosencéphale dans le sous-champ CAI de l’hippocampe de gerbilles.


Canadian Journal of Anaesthesia-journal Canadien D Anesthesie | 1999

Propofol prevents delayed neuronal death following transient forebrain ischemia in gerbils.

Shigeki Yamaguchi; Yukio Midorikawa; Okuda Y; Toshimitsu Kitajima

PurposeThis study was conducted to ascertain whether propofol may protect against delayed neuronal death in the hippocampal CA1 subfield in gerbils.MethodsThirty-five gerbils were randomly assigned to five groups: Group I, the control group, a sham operation treated with physiological saline solution (PSS); Group II, ischemia/reperfusion treated with PSS; Group III, ischemia/reperfusion treated with 50 mg · kg−1 propofol; Group IV ischemia/reperfusion treated with 100 mg · kg−1 propofol; Group V ischemia/reperfusion treated with 150 mg · kg−1 propofol. Transient forebrain ischemia was induced by occluding the bilateral common carotid arteries for four minutes under N2O/O2/halothane anesthesia after administration of propofol or PSS. Five days later, histopathological changes in the hippocampal CA1 subfield were examined using a light microscope and degenerative ratio of the pyramidal cells were measured according to the following formula: (number of degenerative pyramidal cellsAotal number of pyramidal cells per I mm of hippocampal CA1 subfield) × 100.ResultsIn group II, the pyramidal cells were atrophic and pycnotic; vacuolation and structural disruption of the radial striated zone was observed. In the other four groups, these changes were not observed. The degenerative ratios of pyramidal cells were as follows; group 1: 5.9 ± 1.9%, group II: 94.6 ± 2.5% (P < 0.01), group III: 10.7 ± 1.7%, group IV: 9.7 ± 1.8%, group V: 9.2 ± 1.9%.ConclusionThis study suggests that propofol may prevent delayed neuronal death in the hippocampal CA1 subfield after cerebral ischemia/reperfusion in gerbils.RésuméObjectifLa présente étude a été menée pour vérifier si le propofol peut protéger contre la mort neuronale retardée du sous-champ CA1 hippocampique chez des gerbilles.MéthodeTrente-cinq gerbilles ont été répartis au hasard en cinq groupes: le groupe I, témoin, subit une opération fictive traitée avec une solution physiologique salée (SPS); les autres gerbilles subissent une ischémie/reperfusion traitée dans le groupe II avec une SPS; dans le groupe III, avec 50 mg · kg−1 de propofol; dans le groupe IV avec 100 mg · kg−1 de propofol et dans le groupe V avec 150 mg · kg−1 de propofol. L’ischémie transitoire du cerveau antérieur a été induite par l’occlusion bilatérale des artères carotides communes pendant quatre minutes sous anesthésie au N2O/O2/halothane après l’administration de propofol ou de SPS. Cinq jours plus tard, on a vérifié les changements histopathologiques survenus dans le sous-champ CA1 hippocampique à l’aide d’un microscope optique et le taux de dégénérescence des cellules pyramidales a été mesuré comme suit: (nombre de cellules pyramidales dégénératives/nombre total de cellules pyramidales par mm de sous-champ CA1 hippocampique) x 100.RésultatsDans le groupe II, on a noté des cellules pyramidales atrophiques et pycnotiques; on a aussi observé la vacuolisation et la rupture structurale de la zone radiale striée. Dans les quatre autres groupes, ces changements n’ont pas été notés. Les taux de cellules pyramidales dégénératives étaient pour le groupe 1: 5.9 ± 1.9.%, le groupe II: 94.6 ± 2.5 % (P < 0.01), le groupe III: 10.7 ± 1.7 %, le groupe IV: 9.7 ± 1.8 %, le groupe V: 9.2 ± 1.9%.ConclusionCette étude suggère que le propofol peut prévenir la mort neuronale tardive dans le sous-champ CA1 hippocampique à la suite d’une ischémie/reperfusion chez les gerbilles.


Anesthesia & Analgesia | 2010

An Anatomical Basis for Blocking of the Deep Cervical Plexus and Cervical Sympathetic Tract Using an Ultrasound-guided Technique

Yosuke Usui; Toshiya Kobayashi; Hiroyuki Kakinuma; Keisuke Watanabe; Toshimitsu Kitajima; Kenjiro Matsuno

BACKGROUND: A selective blocking method for the cervical plexus and the cervical sympathetic trunk has not yet been established. METHODS: We performed a detailed examination of the neck anatomy using 28 cadavers. The pattern of local anesthetic distribution after injection in 2 healthy volunteers was imaged using computed tomographic scan. RESULTS: The deep cervical plexus was located in the groove between the longus capitis and scalenus medius muscles. The cervical sympathetic trunk was located on the anteromedial surface of the longus capitis. Although anesthetic injected into the longus capitis was confined to the muscle, it infiltrated into neighboring structures including the C2 to C5 roots and sympathetic trunk. CONCLUSIONS: The longus capitis muscle is a suitable landmark for blocking the cervical plexus and trunk.


Regional Anesthesia and Pain Medicine | 1998

Delayed severe airway obstruction due to hematoma following stellate ganglion block

Mutsuo Mishio; Tsutomu Matsumoto; Okuda Y; Toshimitsu Kitajima

Background and Objectives. Delayed onset of airway obstruction following stellate ganglion block (SGB) may be life threatening. We treated a patient who developed a severe airway obstruction caused by a large hematoma several hours after an SGB. Methods. A 62‐year‐old woman suffering from sudden deafness developed dyspnea 2 hours after undergoing her fourth SGB, and evidenced swelling and tenderness in her anterior neck and chest. Her pharyngolaryngeal tissues were edematous, and the glottis was markedly narrowed. Computed tomograms and magnetic resonance images revealed a large soft tissue mass extending from the first cervical vertebra to the diaphragm. Results. Surgical tracheotomy was performed to maintain her airway. Swelling of the vocal cord disappeared on the eleventh day after the operation. Conclusions. We believe that the SGB needle injured the vertebral artery and caused massive hemorrhage anterior to the cervical vertebra, subsequently inducing pharyngolaryngeal edema by obstructing the venous and lymphatic drainage of the cervical region.


Anesthesiology | 1998

Use of a nerve stimulator for phrenic nerve block in treatment of hiccups

Okuda Y; Toshimitsu Kitajima; T. Asai

HICCUPS may be managed with several methods, such as stimulation of the pharynx, compression of the eyeballs, gastric lavage, sedation, and inhalation of carbon dioxide. If these treatments fail, block of the phrenic nerve has been suggested as the last resort. Moore has suggested that if hiccups did not stop after the first attempt at blocking, the procedure should be repeated. Fluoroscopy or chest radiographs taken during inspiration and expiration (double-exposure method)4 can confirm the paralysis of the diaphragm after phrenic nerve block. However, even when the phrenic nerve is blocked, the diaphragm may not be paralyzed. Therefore, objective tests that would detect the successful phrenic nerve block are useful. We report the use of a nerve stimulator for confirmation of phrenic nerve block.


Anaesthesia | 1995

Differential effects of vecuronium on the thumb and great toe as measured by accelography and electromyography

Toshimitsu Kitajima; Keiichi Ishii; Toshiya Kobayashi; Hiromaru Ogata

We evaluated possible differential effects of vecuronium on the thumb and great toe using two types of neuromuscular transmission monitor. Train‐of‐four stimuli were simultaneously applied to the ulnar nerve and tibial nerves using cutaneous electrodes. The responses were quantified with accelographs (thumb and left great toe) and an electromyograph (right great toe). Twenty ASA 1 or 2 patients received, by random allocation, one of two types of anaesthesia: neuroleptanaesthesia or sevoflurane‐based anaesthesia. With both techniques, the shortest time to maximum block after vecuronium 0.1 mg.kg ‐1 occurred in the thumb as measured by accelography. The average (SD) values with neuroleptanaesthesia were: 173(23) s for thumb using accelography; 220(16) s for great toe using accelography; 205(44) s for great toe using electromyography. The average (SD) valuefs) with sevoflurane‐based anaesthesia were: 137(15) for thumb using accelography; 179(21) for great toe using accelography; 153(23) for great toe using electromyography. The differences between the thumb and great toe were statistically significant during both types of anaesthesia when measured with the accelograph (p < 0.01). The time from completion of maximal block to 25% recovery of twitch height in the thumb was significantly longer than that of the great toe as measured by accelography during both types of anaesthesia (p < 0.05). In contrast, there were no statistically significant differences between time to maximum block and 25% recovery of twitch height of the thumb as measured by accelography compared to the values measured for the great toe using electromyography during either anaesthetic technique. The fastest recovery, therefore, was measured in the tibial nerve using accelography. The time to 25% spontaneous recovery after vecuronium 0.1 mg.kg‐1 during sevoflurane anaesthesia was significantly longer than that during neuroleptanaesthesia (p < 0.01).


Canadian Journal of Anaesthesia-journal Canadien D Anesthesie | 2003

A sevoflurane induction of anesthesia with gradual reduction of concentration is well tolerated in elderly patients

Shigeki Yamaguchi; Tomohito Ikeda; Koji Wake; Okuda Y; Toshimitsu Kitajima

PurposeTo establish the appropriate inhalation induction technique using a high concentration of sevoflurane in the elderly.MethodsForty-five patients, aged 70–79-yr-old, were randomly divided into three groups: 1) Group I: anesthesia was induced with propofol 2 mg·kg−1 and sevoflurane 2% (n = 15); 2) Group II: anesthesia was induced with a threeminute inhalation of sevoflurane 8%; 3) Group III: anesthesia was induced with inhalation of sevoflurane using a gradual reduction technique (8, 6, 4% for each minute). In Groups II and III, a modified vital capacity inhalation induction was performed. Mean arterial pressure (MAP), heart rate (HR) and oxygen saturation (SpO2) were measured continuously during induction. In addition, induction time and adverse events related to anesthetic induction were recorded.ResultsThe induction time in Group I was significantly shorter than that in Groups II and III (P < 0.05). However, there was no difference in the induction time between Groups II and III. In Groups II and III, the majority of patients required additional breaths. In comparison with the other groups, stability of MAP was maintained in Group III. The variations of HR in all groups were small. During induction, no patient experienced a decrease in SpO2 below 96%, except for two patients in Group I. Severe respiratory adverse events were not observed. Other adverse events were similar in all groups.ConclusionsOur results suggest that a high concentration sevoflurane induction using a gradual reduction technique may be an acceptable alternative to standard iv induction in elderly patients.RésuméObjectifRéaliser la technique appropriée d’induction par inhalation en utilisant une forte concentration de sévoflurane chez des patients âgés.MéthodeQuarante-cinq patients de 70–79 ans, ont été répartis de façon aléatoire en trois groupes : 1) groupe I : anesthésie induite avec 2 mg·kg−1 de propofol et du sévoflurane à2%(n = 15) ; 2) groupe II : anesthésie induite avec l’inhalation de sévoflurane à 8 % pendant 3 min ; 3) groupe III : anesthésie induite avec l’inhalation de sévoflurane selon la technique de réduction graduelle de la concentration (8, 6, 4 % pour chaque minute). Dans les groupes II et III, une induction par inhalation, avec modification de la capacité vitale, a été réalisée. La tension artérielle moyenne (TAM), la fréquence cardiaque (FR) et la saturation du sang en oxygène (SpO2) ont été mesurées en continu pendant l’induction. De plus, le temps nécessaire à l’induction et les événements indésirables reliés à l’induction anesthésique ont été notés.RésultatsLe temps d’induction a été significativement plus court dans le groupe I que dans les groupes II et III (P < 0,05). Aucune différence de temps d’induction n’a été relevée entre les groupes II et III. Dans ces groupes II et III, la majorité des patients ont eu besoin de ventilation supplémentaire. Comparativement aux autres groupes, la stabilité de la TAM a été maintenue dans le groupe III. Les variations de FC ont été faibles dans tous les groupes. Pendant l’induction, aucun patient n’a subi de baisse de la SpO2 en dessous de 96 %, sauf deux patients du groupe I. Aucune complication respiratoire sévère n’a été observée. Les autres événements indésirables ont été comparables d’un groupe à l’autre.ConclusionNos résultats montrent qu’une induction avec une forte concentration de sévoflurane, selon une technique de réduction graduelle, peut remplacer l’induction iv habituelle de façon acceptable chez les patients âgés.


Canadian Journal of Anaesthesia-journal Canadien D Anesthesie | 2002

Recovery of psychomotor function after propofol sedation is prolonged in the elderly

Mio Shinozaki; Yosuke Usui; Shigeki Yamaguchi; Okuda Y; Toshimitsu Kitajima

PurposeTo assess the effects of age on recovery of psychomotor function for propofol sedation during spinal anesthesia.MethodsPropofol was continuously infused during surgery and spinal anesthesia in 15 elderly patients (65–85 yr-old) and 15 younger patients (20–50 yr-old). Infusion rates were adjusted to maintain an appropriate level of sedation using the bispectral index (range 60–70). The sedative infusion was discontinued at the end of surgery. The early recovery times from the end of propofol infusion to opening of eyes on command, sustaining a hand grip, and recall of name were noted. Psychomotor function, as measured by the Trieger’s dot test, was evaluated before anesthesia and 30, 60, 90, 120 min after the end of propofol infusion.ResultsThe duration of anesthesia was 142 ± 55 min and 134 ±61 min in the elderly and younger patients, respectively. No differences were observed in early recovery times between elderly and younger patients (opened their eyes on command, 6.3 ± 4.0 min and 5.2 ± 2.6 min; sustained a hand grip, 7.2 ± 3.9 min and 6.1 ± 3.5 min and recalled their name, 8.0 ± 4.5 min and 6.5 ± 3.8 min,P > 0.05). The recovery of psychomotor function in the elderly took longer compared with the younger patients, and psychomotor function in the elderly recovered at 120 min after the end of propofol infusion.ConclusionEarly recovery times following propofol sedation is similar between elderly and younger patients, but recovery of psychomotor function in the elderly is delayed compared with younger patients.RésuméObjectifÉvaluer les effets de l’âge sur la récupération de la fonction psychomotrice à la suite d’une sédation au propofol pendant la rachianesthésie.MéthodeUne perfusion continue de propofol a été utilisée pendant une intervention chirurgicale sous rachianesthésie chez 15 patients âgés (65–85 ans) et 15 patients plus jeunes (20–50 ans). Les vitesses de perfusion ont été réglées de façon à maintenir un niveau approprié de sédation à l’aide de l’index bispectral (intervalle de 60–70). La perfusion a été interrompue à la fin de l’opération. On a noté le temps écoulé entre la fin de la perfusion jusqu’à l’ouverture des yeux sur commande, le moment où le patient peut maintenir la préhension de la main et se nommer. La fonction psychomotrice, mesurée par le test de Trieger, a été évaluée à 30, 60, 90 et 120 min après la fin de la perfusion de propofol.RésultatsLa durée de l’anesthésie a été de 142 ± 55 min et de 134 ± 61 min chez les patients âgés et les plus jeunes, respectivement. Aucune différence des temps de récupération précoce n’a été observée entre les patients âgés et les autres (l’ouverture des yeux sur commande: 6,3 ± 4,0 min et 5,2 ± 2,6 min; la préhension de la main: 7,2 ± 3,9 min et 6,1 ± 3,5 min et la capacité de se nommer: 8.0 ± 4,5 min et 6,5 ± 3,8 min, P > 0,05). Le rétablissement de la fonction psychomotrice a été plus long chez les gens âgés comparés aux plus jeunes et s’est produit à 120 min après la fin de la perfusion de propofol chez les patients âgés.ConclusionLes temps de récupération précoce qui suit la sédation au propofol sont similaires chez les patients âgés ou plus jeunes, mais le rétablissement de la fonction psychomotrice est retardé chez les patients âgés comparés à des patients plus jeunes.


Canadian Journal of Anaesthesia-journal Canadien D Anesthesie | 1998

Superoxide radical generation and histopathological changes in hippocampal CA1 after ischaemia/ reperfusion in gerbils

Shigeki Yamaguchi; Hiromaru Ogata; Shinsuke Hamaguchi; Toshimitsu Kitajima

PurposeWe investigated the relationship between the generation of Superoxide radicals and histopathological changes on delayed neuronal death in the hippocampal CA1 subfield.MethodsSeventy gerbils were randomly assigned to two groups, a sham group and an ischaemia/reperfusion (I/R) group. In the I/R group, transient forebrain ischaemia was induced by occluding the bilateral common carotid arteries for four minutes. The cerebrum was removed after reperfusion at intervals of one minute, six, twelve and twenty-four hr and at three, five and seven days. Each forebrain was cut into two portions including the hippocampus. The quantity of Superoxide radicals was measured by using chemiluminescence, and histopathological changes in the hippocampal CAI subfield were examined.ResultsIn the I/R group, Superoxide radicals increased on the 3rd and 5th days compared with the sham group (16.1 ±3.4vs3.2± 1.0 on the third day (P < 0.0001 ); 10.9 ± 1.9 vs 3.3 ± 0.8 on the fifth day (P < 0.0001)). In the I/R group, the pyramidal cells were atrophic and pycnotic; vacuolation, and structural disruption of the radial striated zone were observed from the third through the seventh day. In the sham group, these changes were not observed. There were differences of degenerative ratios in the pyramidal cells between the two groups from the third to seventh days (5.6 ± 2.0 vs 80.9 ± 3.3 on the third day (P < 0.05); 6.9 ± 0.4 vs 93.6 ± 2.4 on the fifth day (P < 0.05); 6.2 ± 1.5 vs 95.0 ± 1.3 on the seventh day (P < 0.05)).ConclusionThere is a correlation between the generation of Superoxide radicals and histopathological changes of the pyramidal cells in the hippocampal CAI subfield.RésuméObjectifInvestiguer la relation entre la production des radicaux superoxydes et les changements histopathologiques sur le décès neuronal retardé dans le champ hippocampique CAL.MéthodesSoixante-dix gerbilles ont été aléatoirement réparties en 2 groupes, un groupe contrôle et un groupe ischémie/reperfusion (I/R). Dans le groupe I/R, une ischémie transitoire du prosencéphale était induite par l’occlusion bilatérale des carotides communes pour quatre minutes. Après reperfusion, le cerveau était retiré de l’animal après une minute de même qu’à six, douze et vingt-quatre heures ainsi qu’à trois, cinq et sept jours. Chaque prosencéphale était coupé en deux parties incluant l’hippocampe. La quantité de radicaux superoxydes était mesurée par chemiluminescence et les changements histopathologiques dans le champ hippocampique CAI étaient observés.RésultatsDans le groupe I/R, les radicaux superoxydes ont augmenté aux jours 3 et 5 comparativement au groupe témoin (16,1 ±3,4 vs 3,2± 1,0 au jour 3 (P< 0,000l); 10,9 ± 1,9 vs 3,3 ± 0,8 au jour 5 (P< 0,000l)). Dans le groupe I/R, les cellules pyramidales étaient atrophiques et picnotiques; du 3e au 7e jour, on a observé de la vacuolisation et de la destruction structurale de la zone striée radiaire, et ces changements n’ont pas été retrouvés dans le groupe témoin. On a observé des différences dans le pourcentage dégénératif des cellules pyramidales entre les deux groupes à partir du jour 3 au jour 7 (5,6 ± 2,0 vs 80,9 ± 3,3 au jour 3 (P< 0,05); 6,9 ± 0,4 vs 93,6 ± 2,4 au jour 5 (P< 0,05); 6,2 ± 1,5vs 95,0 ± 1,3 au jour 7 (P< 0,05)).ConclusionIl y a une corrélation entre la production de radicaux superoxydes et les changements histopathologiques des cellules pyramidales du champ CAI de l’hippocampe.

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T. Asai

Kansai Medical University

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