A new neurosurgical irrigating sucking cutter

1986 ◽  
Vol 65 (1) ◽  
pp. 120-121
Author(s):  
Kevin F. Bleasel ◽  
Richard B. Frost
Keyword(s):  
Clinical Practice ◽  
Content Type ◽  
New Instrument ◽  
Fine Print

✓ A new instrument has been developed for the removal of tumors located in areas difficult to reach. It operates by suctioning and cutting tissue, and is equipped with an irrigating sucker. This device is described and its successful use in clinical practice is summarized.

A new bipolar right-angled coagulation forceps for pituitary surgery

1983 ◽  
Vol 58 (4) ◽  
pp. 614-615 ◽  
Author(s):  
Alex M. Landolt
Keyword(s):  
Pituitary Surgery ◽  
Bipolar Coagulation ◽  
Content Type ◽  
Anterior Aspect ◽  
New Instrument ◽  
Transsphenoidal Pituitary Surgery ◽  
Fine Print

✓ A new instrument is described which allows easy and precise bipolar coagulation of the anterior intercavernous sinus. In some cases this sinus covers the anterior aspect of the pituitary and may render transsphenoidal pituitary surgery difficult.

S-100 protein and neuron-specific enolase in CSF after experimental traumatic or focal ischemic brain damage

1989 ◽  
Vol 71 (5) ◽  
pp. 727-731 ◽  
Author(s):  
Hans-Göran Hårdemark ◽  
Nils Ericsson ◽  
Zbigniew Kotwica ◽  
Gerd Rundström ◽  
Ib Mendel-Hartvig ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Brain Damage ◽  
Focal Cerebral Ischemia ◽  
Neuron Specific Enolase ◽  
Experimental Models ◽  
Neurological Injury ◽  
Content Type ◽  
Mca Occlusion ◽  
S 100 ◽  
Fine Print

✓ Cerebrospinal fluid (CSF) markers of brain damage are potentially capable of providing quantitative information about the extent of certain neurological injury. The presence of such markers in CSF after brain damage is transient and it is essential to understand their kinetics if they are to be used in clinical practice. In the present study, the CSF concentrations of two neurospecific proteins, S-100 protein and neuron-specific enolase (NSE), were determined in rats before and repeatedly after one of two types of experimental brain damage: traumatic cortical injury and focal cerebral ischemia induced by middle cerebral artery (MCA) occlusion. The two types of experimental brain damage resulted in significant differences in the kinetics of S-100 and NSE concentrations in CSF. Cortical contusion was followed by a rapid increase in both S-100 and NSE and a peak occurred in both after about 7½ hours, at which time the values declined toward normal. A second, smaller peak was seen after about 1½ days. The increase and decrease in S-100 and NSE levels in CSF was slower after MCA occlusion; a peak was seen after 2 to 4 days. Furthermore, S-100 was generally higher than NSE after trauma, whereas after MCA occlusion the NSE concentration was slightly higher than the S-100 value. These results support the use of CSF markers for estimation of the extent of brain damage in experimental models and forms a basis for the understanding of their kinetics, which is important for their use in clinical practice.

History of spinal cord stereotaxy

1996 ◽  
Vol 85 (4) ◽  
pp. 725-731 ◽  
Author(s):  
Eric M. Gabriel ◽  
Blaine S. Nashold
Keyword(s):  
Spinal Cord ◽  
Clinical Practice ◽  
Spinal Fusion ◽  
Spinal Surgery ◽  
Experimental Studies ◽  
Functional Neurosurgery ◽  
Content Type ◽  
Anatomy And Physiology ◽  
History Of ◽  
Fine Print

✓ Stereotactic and functional neurosurgery has experienced a remarkable degree of development during the last 50 years, from the plaster of Paris frame of Spiegel and Wycis to the technology of frameless stereotaxis. Although predominantly used for intracranial procedures, stereotaxy has its roots in experimental studies of the spinal cord. The field of spinal cord stereotaxy has not received the same amount of attention as supratentorial surgery, but there have been significant contributions to the field that have helped to further our understanding of spinal cord anatomy and physiology. Now that frameless stereotaxis has reached clinical practice, there may be further developments in the field of spinal surgery: this technique may prove useful for spinal fusion operations and, possibly, intramedullary operations as well.

A new instrument for improved accuracy of stereotactic depth electrode placement

1996 ◽  
Vol 85 (2) ◽  
pp. 357-358 ◽  
Author(s):  
Richard D. Ashpole ◽  
Gavin C. A. Fabinyi ◽  
Milos Vosmansky
Keyword(s):  
Simple Device ◽  
Electrode Placement ◽  
Content Type ◽  
Depth Electrodes ◽  
Depth Electrode ◽  
New Instrument ◽  
Improved Accuracy ◽  
Fine Print

✓ A disadvantage of stereotactic placement of flexible depth electrodes is the risk of inaccurate positioning as a result of electrode movement when the introducer is withdrawn. A simple device that virtually eliminates this error is described.

Factors influencing future progress in neurosurgery

1979 ◽  
Vol 50 (5) ◽  
pp. 541-544 ◽  
Author(s):  
Arthur A. Ward
Keyword(s):  
Clinical Practice ◽  
Surgical Procedures ◽  
Training Programs ◽  
Research Interest ◽  
Neurosurgical Training ◽  
Content Type ◽  
Factors Influencing ◽  
Fine Print

✓ The ever-widening horizons in the neurosciences are noted by the author. Maintenance of the bridges between research and clinical practice will result in improved therapy. Research interest is expanding, and involvement by neurosurgeons and neurosurgical training programs is vital for future progress. Techniques are required to evaluate and assess new surgical procedures that evolve from research endeavors.

A dowel inserter for anterior cervical interbody fusion

1984 ◽  
Vol 61 (4) ◽  
pp. 793-794
Author(s):  
Lennart Brandt ◽  
Bengt Ljunggren
Keyword(s):  
Interbody Fusion ◽  
Content Type ◽  
New Instrument ◽  
Bone Dowels ◽  
Fine Print

✓ The authors describe a new instrument for placement of bone dowels in procedures for anterior cervical interbody fusion.

The plated bayonet: a new instrument to facilitate surgery for intra-axial neoplasms of the spinal cord and brain stem

1993 ◽  
Vol 78 (3) ◽  
pp. 505-507 ◽  
Author(s):  
Fred J. Epstein ◽  
Memet Ozek
Keyword(s):  
Spinal Cord ◽  
Brain Stem ◽  
Cranial Nerves ◽  
Neoplastic Tissue ◽  
Content Type ◽  
Small Incision ◽  
New Instrument ◽  
The Brain ◽  
Fine Print

✓ A new instrument for use in surgically treating intra-axial neoplasms of the spinal cord and brain stem is described. The plated bayonet allows neoplastic tissue in the spinal cord to be separated from functioning neural elements without perforating the adjacent spinal cord. In addition, the plated bayonet facilitates exposure through the very small incision necessary to remove tumors of the brain stem without damaging cranial nerves or other vital structures.

Compound elevated fractures of the skull

1976 ◽  
Vol 44 (1) ◽  
pp. 77-79 ◽  
Author(s):  
Bruce Lawrence Ralston
Keyword(s):  
Clinical Practice ◽  
Content Type ◽  
Fine Print

✓ The author presents two cases of compound elevated fractures of the skull and discusses the mechanics of their production. These lesions, seldom recognized in modern clinical practice, are first described in the oldest scientific and surgical treatise known, the Edwin Smith Surgical Papyrus, over 5000 years ago.

An MKM-mounted instrument holder for frameless point-stereotactic procedures: a phantom-based accuracy evaluation

2001 ◽  
Vol 95 (6) ◽  
pp. 1067-1074 ◽  
Author(s):  
Peter W. A. Willems ◽  
Herke Jan Noordmans ◽  
Jan Willem Berkelbach van der Sprenkel ◽  
Max A. Viergever ◽  
Cees A. F. Tulleken
Keyword(s):  
Individual Case ◽  
Accuracy Evaluation ◽  
Content Type ◽  
Target Registration Error ◽  
Stereotactic Frame ◽  
New Instrument ◽  
The Mean ◽  
Actual Target ◽  
Test Phantom ◽  
Fine Print

✓ To enable the use of the Mehrkoordinaten Manipulator (MKM) robotic navigation system for frameless point stereotactic procedures, a new instrument holder is presented. A phantom-based accuracy study was performed in which this new method was compared with frame-based procedures performed using the Brown-Roberts-Wells (BRW) stereotactic frame. The authors acquired computerized tomography scans of a test phantom, consisting of 19 acrylic plastic target rods on a circular base. These images were used in frame-based (BRW) and frameless (MKM) localization experiments. In both cases the authors calculated the distances between the actual target positions and the positions reached stereotactically. The mean application accuracy (target registration error) was 0.68 mm when the BRW frame was used and 0.96 mm when the MKM system was used after manual repositioning of the microscope (p < 0.001). Positioning accomplished using robotics only demonstrated a slightly larger inaccuracy: 1.47 mm (p < 0.005). Because the surgeon is concerned with the largest error in an individual case rather than the mean error in a large number of cases, the mean + three standard deviations was also compared. This value differed very little between the manually positioned MKM system and the BRW frame (2.04 mm and 1.84 mm, respectively). Although repeatability per target appeared to be slightly better when the BRW frame was used, accuracy was more homogeneous over the phantom volume when the MKM system was used (both differences were not significant). In conclusion, the accuracy of point stereotactic procedures performed using an instrument holder attached to the MKM system is comparable with the accuracy of procedures involving a stereotactic frame. Moreover, the frameless techniques and robotic features of the MKM enable a more surgeon- and patient-friendly stereotactic procedure.

A comparison of intraparenchymatous and intraventricular pressure recording in clinical practice

1987 ◽  
Vol 67 (6) ◽  
pp. 841-845 ◽  
Author(s):  
Göran Sundbärg ◽  
Carl-Henrik Nordström ◽  
Kenneth Messeter ◽  
Sven Söderström
Keyword(s):  
Clinical Practice ◽  
Brain Lesions ◽  
Intraventricular Pressure ◽  
Pressure Monitoring ◽  
Content Type ◽  
Pressure Recording ◽  
Clinical Conditions ◽  
Fine Print ◽  
Better Than

✓ A comparison of intraventricular pressure (IVP) and intraparenchymatous pressure was performed in 11 patients with severe traumatic brain lesions. Intraparenchymatous pressure was measured with a Honeywell microtransducer placed intracerebrally. Before the microtransducer was used in clinical practice, basic data on drift and temperature sensitivity were tested in experiments in vitro. Under clinical conditions the correspondence between the measured IVP and intraparenchymatous pressures appeared to be better than previously reported for different devices for epidural or subdural pressure recording. It is concluded that intraparenchymatous pressure monitoring is reliable in clinical practice and that such measurements are valuable in patients with compressed and/or distorted ventricles that preclude possibilities for IVP recording.

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