ATLANTOAXIAL FIXATION TECHNIQUE

✓ The authors describe a modified posterior atlantoaxial fixation technique for the treatment of reducible atlantoaxial instability, which can be performed simply and easily, and can decrease the risk of vessel and/or neural damage. During an 18-month period, this technique was undertaken in 11 patients with atlantoaxial instability. There was no procedure-related morbidity. The follow-up period ranged from 8 to 18 months (mean 13.2 months). Fusion was documented in all 11 patients, and there was no progression of spinal deformity. This technique can be considered an effective alternative in the treatment of atlantoaxial subluxation.

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C2 Translaminar Screw Fixation (Wright`s Technique) Applicability in Atlantoaxial Instability

JBNC - JORNAL BRASILEIRO DE NEUROCIRURGIA ◽

10.22290/jbnc.v23i2.1163 ◽

2018 ◽

Vol 23 (2) ◽

pp. 152-156

Author(s):

Lucas Alves Aurich ◽

Jerônimo Buzetti Milano ◽

Erasmo Barros Da Silva Júnior ◽

Ricardo Ramina

Keyword(s):

Screw Fixation ◽

Atlantoaxial Instability ◽

Rigid Fixation ◽

Fixation Technique ◽

Advantages And Disadvantages ◽

Risks And Benefits ◽

Translaminar Screw Fixation ◽

Translaminar Screw ◽

Fixation Techniques ◽

Atlantoaxial Fixation

Atlantoaxial instability often requires surgical treatment. Several techniques are available to perform antlantoaxial stabilization, and all of these have their different advantages and disadvantages. In 2004, Wright described the C2translaminar screw fixation, which offers rigid fixation but without the technical demands of C2 pars placement and eliminates the risk of vertebral artery injury. The aim of this study is to review the C2 translaminar screw fixation technique, emphasizing operative details, risks and benefits comparing with the others atlantoaxial fixation techniques.

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Triple Fixation For Electron Microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100100196 ◽

1968 ◽

Vol 26 ◽

pp. 90-91 ◽

Cited By ~ 1

Author(s):

M. A. Hayat

Keyword(s):

Electron Microscopy ◽

Endoplasmic Reticulum ◽

Electron Beam ◽

Plasma Membrane ◽

Myelin Sheath ◽

Good Deal ◽

Granular Structure ◽

Oxidizing Agent ◽

Fixation Technique ◽

Large Clusters

Potassium permanganate has been successfully employed to study membranous structures such as endoplasmic reticulum, Golgi, plastids, plasma membrane and myelin sheath. Since KMnO4 is a strong oxidizing agent, deposition of manganese or its oxides account for some of the observed contrast in the lipoprotein membranes, but a good deal of it is due to the removal of background proteins either by dehydration agents or by volatalization under the electron beam. Tissues fixed with KMnO4 exhibit somewhat granular structure because of the deposition of large clusters of stain molecules. The gross arrangement of membranes can also be modified. Since the aim of a good fixation technique is to preserve satisfactorily the cell as a whole and not the best preservation of only a small part of it, a combination of a mixture of glutaraldehyde and acrolein to obtain general preservation and KMnO4 to enhance contrast was employed to fix plant embryos, green algae and fungi.

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Simple keel fixation technique for endoscopic repair of anterior glottic stenosis

Yearbook of Otolaryngology-Head and Neck Surgery ◽

10.1016/s1041-892x(07)70117-8 ◽

2007 ◽

Vol 2007 ◽

pp. 131-133 ◽

Cited By ~ 1

Author(s):

M.A. Keefe

Keyword(s):

Fixation Technique ◽

Endoscopic Repair

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CHEMISTRY OF GONADOTROPHINS IN RELATION TO THEIR ANTIGENIC PROPERTIES

Acta Endocrinologica ◽

10.1530/acta.0.062s013 ◽

1969 ◽

Vol 62 (1_Suppl) ◽

pp. S13-S30 ◽

Cited By ~ 8

Author(s):

W. R. Butt

Keyword(s):

Biological Activity ◽

Guinea Pigs ◽

Complement Fixation ◽

Neuraminic Acid ◽

Fixation Technique ◽

Immunological Activity ◽

Antigenic Properties ◽

Specific Antisera ◽

Structural Differences

ABSTRACT Several chemical differences between FSH, LH and HCG have been reported: thus LH and HCG are richer in proline than FSH and FSH and HCG contain more N-acetyl neuraminic acid than LH. Sub-units of LH are formed by treatment with urea, guanidine or acid. HCG also may contain two sub-units. The sub-units from LH are biologically inert but retain their immunological activity: biological activity is restored when the sub-units are incubated together. There is much evidence from chemical and enzymic reactions that antigenic groups are distinct from those parts of the molecule essential for biological activity. N-acetyl neuraminic acid and probably other carbohydrates in FSH and HCG are not involved in immunological activity but are necessary for biological activity. Histidine, methionine and possibly cysteine appear to be essential for biological but not immunological activity of FSH, while tryptophan and possibly tyrosine are not essential for either. A few highly specific antisera to gonadotrophins have been prepared in rabbits and guinea pigs to crude antigens: there is no evidence that purified antigens are more likely to produce specific antisera. Differences in the immunological reactivities of urinary compared with pituitary gonadotrophins have been observed both by radioimmunoassay and by the complement fixation technique. The latter may be particularly useful for detecting structural differences in the hormones.

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Effects of Fixation Technique On Thoracic Epidural Catheter Displacement

Case Medical Research ◽

10.31525/ct1-nct03976154 ◽

2019 ◽

Author(s):

Keyword(s):

Epidural Catheter ◽

Fixation Technique ◽

Thoracic Epidural ◽

Thoracic Epidural Catheter

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Abstaining from symptomatic implants of modified tension band wiring by nonabsorbable suture fixation for transverse patella fractures

Journal of Orthopaedic Surgery and Research ◽

10.1186/s13018-021-02494-3 ◽

2021 ◽

Vol 16 (1) ◽

Author(s):

Puripun Jirangkul ◽

Arkaphat Kosiyatrakul

Keyword(s):

Steel Wire ◽

Clinical Results ◽

Tension Band ◽

Fixation Technique ◽

Nonabsorbable Suture ◽

Patella Fractures ◽

Sufficient Stability ◽

The Mean ◽

Conventional Stainless Steel

Abstract Background Modified tension band fixation has become commonly used for transverse patella fractures. The conventional stainless steel wire provides sufficient stability but may be associated with complications. Objective The study aimed to evaluate the effectiveness of a new modified tension band fixation technique for transverse patella fractures using a nonabsorbable suture. Material and methods We present the result of a prospective series using a nonabsorbable suture (FiberWire) for transverse patella fractures. The mean follow-up period totaled 12 months. A total of 16 patients were evaluated by radiographic and clinical review. The postoperative clinical evaluation employed Lysholm and Böstman scores. Result All clinical results on follow-up were good to excellent. Minimal intra-articular joint stepping and further fracture displacement were recorded. No patient needed re-operation, and functional outcomes of the knee were satisfactory. No significant differences were found between the injured and contralateral knee range of motion. No symptomatic implants and skin complications were noted, and all fractures were completed heal within 15 weeks. Conclusion FiberWire provided sufficient stability and reduced postoperative complications. The results proved appropriate, and the technique has merit, as it obviates the need for re-operation.

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