Effects of Systemic Cooling and Rewarming on the Evoked Spinal Cord Potentials and Local Spinal Cord Blood Flow in Dogs

Kano, Tatsuhiko; Sadanaga, M; Sakamoto, Masakatsu; Higashi, Kiichiro; Matsumoto, Morimasa

doi:10.1213/00000539-199405000-00011

Cited by 13 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ESCP and the N and P waves of seg. descending ESCP are more easily depressed by anesthesia [13,14], hypothermia [15], and ischemia [12,16], compared with nonsynaptic components, and this might explain why seg. ESCPs are seldom used as a clinical indicator of spinal ischemia under anesthesia combined with induced hypothermia.…”

Section: Discussionmentioning

confidence: 99%

“…descending ESCP is a useful and sensitive indicator of spinal cord ischemia under deep fentanyl anesthesia and mild (33~176 hypothermia. Subsequent 172 or P waves, which are more susceptible to anesthetic agents [13,14] and hypothermia [15], had almost flattened prior to AXC and were not available as an indicator of ischemia. The high-cut setting of the band-pass filter in the ESCP recording might be also attributed to the suppression of slow P2 or P waves.…”

Section: Discussionmentioning

confidence: 99%

“…ESCP could be available for the monitoring of spinal ischemia under hypothermia down to 23~176 and the N wave of seg. descending ESCP down to 30~ [15].…”

Section: Discussionmentioning

confidence: 99%

“…mixed ESCPs in others. Our previous animal experiment [15] revealed that a bipolar recording electrode was situated not along the spinal cord but across it when seg. descending ESCP was recorded from the canine epidural space over the lumbosacral enlargement.…”

Section: Discussionmentioning

confidence: 99%

“…ESCPs in four of five patients whose body temperature decreased during AXC. Amplitude augmentation of the con& mixed ESCPs has already been reported at the initial phase of spinal ischemia [11,12,20], compression [21], or cooling [15] before eventual decline, although the mechanism is still not clear. One possible explanation for amplitude augmentation during AXC is additional excitation of the subliminal nerve fibers [20].…”

Section: Discussionmentioning

confidence: 99%

See 4 more Smart Citations

Spinal function monitoring by evoked spinal cord potentials in aortic aneurysm surgery

et al. 1995

Self Cite

View full text Add to dashboard Cite

Evoked spinal cord potentials (ESCPs) were monitored in 12 patients who underwent repair of thoracoabdominal aortic aneurysm with a high risk of spinal ischemia. A pair of bipolar catheter electrodes were introduced into the epidural space, one at the level of the C5-T2 vertebrae and the other at the level of T11-L2. Conductive mixed ESCP in seven patients, conductive sensory ESCP in one patient, and segmental descending ESCP in three patients were observed by applying a rectangular electric current to one of each pair of epidural electrodes and recording through the other. Segmental ESCP in response to posterior tibial nerve stimulation was observed in one patient. Following aortic cross-clamping, the I wave of conductive mixed ESCPs gradually decreased in amplitude with latency prolongation in five of the seven patients and disappeared in one of these five; transient augmentation of amplitude was observed before eventual decline in four of these five patients. The N wave of segmental descending ESCP subsequently flattened in two of the three patients and the N1 wave of segmental ESCP in the one patient. Three of the four patients in whom the ESCPs disappeared during aorta clamping recovered the ESCPs after declamping and showed no neurological disorders postoperatively. Intraoperative ESCP monitoring appears to be useful to detect spinal cord ischemia in the early stage and to alert surgeons and anesthesiologists so that timely resuscitative steps can be taken.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…ESCP could be available for the monitoring of spinal ischemia under hypothermia down to 23~176 and the N wave of seg. descending ESCP down to 30~ [15].…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Spinal function monitoring by evoked spinal cord potentials in aortic aneurysm surgery

et al. 1995

Self Cite

View full text Add to dashboard Cite

show abstract

Evoked Spinal Cord Potentials

Shimoji¹,

Willis²

2006

Self Cite

View full text Add to dashboard Cite

PrefaceThe technique of using evoked spinal cord potentials (SCPs) has become an important clinical tool for monitoring spinal cord surgery and diagnosing spinal cord diseases. The technique is a result both of the technical development of recording evoked SCPs from the epidural space without perforation of the dura mater and of the development of medical electronics. Its use as a monitoring tool is based on continuous epidural analgesia with an epidural catheter. Since the first development of epidural recording of evoked SCPs in 1971, the technique has been applied in various institutes, particularly for monitoring during spine or spinal cord surgery and cardiovascular surgery, and recently for diagnosis of spinal cord diseases.Although the results of studies on monitoring during surgery have proved useful, more detailed neurophysiological mechanisms in the origin of each component of evoked SCPs remain to be explained in the area of diagnosis of spinal or central nervous system diseases. Further neurophysiological and neuropharmacological studies of the human spinal cord may contribute to the clinical application of recording evoked SCPs for diagnosis of spinal cord diseases.The aim of this book is to furnish a survey of the neurophysiological and neuropharmacological bases of evoked SCPs with reference to animal studies and the techniques of recording the potentials mainly from the spinal epidural space. The authors have been involved in the field from the beginning of the 1970s. Many illustrations are presented for better understanding the neurophysiological and neuropharmacological backgrounds of monitoring spinal cord functions. Case studies also are presented and discussed to provide more insight into the monitoring and diagnosis of spinal cord dysfunctions and spinal cord diseases. This book is thus appropriate even for students or those new to the fields of clinical neurophysiology, neurosurgery, neurology, orthopedics, and neuroanesthesia who are interested in monitoring spinal cord function during surgery or diagnosing spinal cord diseases. A diverse range of terminology has been used in the literature to date, sometimes leading to misinterpretation of each component in the field of evoked SCPs. To avoid such misinterpretation and to provide readers with an accurate understanding, terminology referring to basic animal studies is used, and lucid explanations are included in this volume.

show abstract