scholarly journals Update on Angiolytic Laser Laryngeal Surgery

2021 ◽  
Vol 32 (2) ◽  
pp. 51-55
Author(s):  
Min Seok Kang ◽  
Jae-Yol Lim
Keyword(s):  
Co2 Laser ◽  
Laser Surgery ◽  
Focal Length ◽  
Mode Of Delivery ◽  
Surgical Techniques ◽  
Spot Size ◽  
Depth Of Penetration ◽  
Laryngeal Diseases ◽  
Advantages And Disadvantages ◽  
Laryngeal Lesions

There are several lasers available for office-based or suspension microlaryngoscopy laser procedures in the treatment of laryngeal diseases. Each has advantages and disadvantages given the depth of penetration per unit of power, absorption in water, spectral absorption characteristics, mode of delivery, safety, and cost. It is important to note that while the proper selection of indication of treatment based on a laser wavelength is critical, of equal importance is selecting the appropriate power setting, focal length (or spot size), and time of exposure. The photoangiolytic lasers precisely target hemoglobin within the microcirculation of the highly vascularized tissue and may have better hemostatic effects and preservation of surrounding normal tissue than the CO2 laser. Although the choice of laser is purely theoretical and cannot be accurately concluded which parameters of laser (wattage and pulse width) were best to use, photoangiolytic laser surgery is safe and effective for specific laryngeal lesions. In this review, indications for photoangiolytic laser procedures for various laryngeal diseases, laser settings and surgical techniques for specific laryngeal lesions including sulcus vocalis, laryngeal dysplasia, and recurrent respiratory papillomatosis will be introduced. Pros and cons of in-office laser surgery using photoangiolytic laser and flexible CO2 laser will also be addressed.

Spot size and effective focal length measurements for a fast axial flow CO2 laser

1997 ◽  
Author(s):  
Robert J. Steele ◽  
Phillip W. Fuerschbach ◽  
Danny O. MacCallum
Keyword(s):  
Co2 Laser ◽  
Focal Length ◽  
Axial Flow ◽  
Spot Size ◽  
Effective Focal Length ◽  
Length Measurements

scholarly journals Managing Benign and Malignant Oral Lesions with Carbon Dioxide Laser: Indications, Techniques, and Outcomes for Outpatient Surgery

2019 ◽  
Vol 05 (03) ◽  
pp. e69-e75
Author(s):  
Alberto Maria Saibene ◽  
Cecilia Rosso ◽  
Paolo Castellarin ◽  
Federica Vultaggio ◽  
Carlotta Pipolo ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Co2 Laser ◽  
Laser Surgery ◽  
Carbon Dioxide Laser ◽  
Outpatient Surgery ◽  
Surgical Techniques ◽  
Systematic Evaluation ◽  
Oral Lesions ◽  
Wide Range ◽  
Malignant Lesions

Purpose Because of its affinity for water-based tissues, carbon dioxide (CO2) laser has become an instrument of choice for treating oral mucosa conditions, ranging from inflammatory to malignant lesions. The aim of this work is to systematically evaluate the outcomes of laser surgery over a wide range of lesions, while providing a solid and reproducible protocol for CO2 laser surgery in the outpatient management of oral lesion. Methods Seventy-eight patients underwent 92 laser outpatient procedures for treatment of a wide range of benign and malignant lesions. We performed 60 removals, 11 exeretic biopsies, 15 vaporizations, and 3 vaporization/removal combined. We analyzed laser parameters applied for each technique and provided a systematic evaluation of surgical results. Results No problems occurred intraoperatively in any of the patients. Five patients complained marginal pain, while 3 patients had postsurgery bleeding. All treatments were successful, with the notable exception of 3 relapsing verrucous proliferative leukoplakias and an infiltrating squamous cell carcinoma of the tongue requiring radicalization. We did not record any adverse reactions to drugs or lesions due to laser action. Concordance between clinical diagnosis and pathology results was at 94.8%. Conclusions Our data indicate that CO2 laser is a solid choice for outpatient treatment of oral lesions. This technique grants painless and almost bloodless treatment, with negligible recurrence rates. Providing a solid reference for laser settings and operative techniques could provide a foundation for further exploring this tool while offering the basis for a positive comparison between different surgical techniques and options.

Laser Surgery of the Larynx: The Case for Caution

1992 ◽  
Vol 71 (11) ◽  
pp. 593-595 ◽  
Author(s):  
Robert Thayer Sataloff ◽  
Joseph R. Spiegel ◽  
Mary Hawkshaw ◽  
Alyson Jones
Keyword(s):  
Special Education ◽  
Operating Room ◽  
Co2 Laser ◽  
Laser Surgery ◽  
Vocal Fold ◽  
Thermal Injury ◽  
Surgical Skill ◽  
Laryngeal Surgery ◽  
Laryngeal Lesions ◽  
Operating Room Team

Laser surgery has been advocated for treatment of many laryngeal lesions. Although the CO2 laser has many advantages, its safe use requires special education of the surgeon and operating room team, and considerable surgical skill. Several dangers inherent in laser use for laryngeal surgery must be considered. These include vocal fold scarring secondary to thermal injury, loss of histopathologically important tissue through vaporization, airway fire and others. Laser-related complications must be considered whenever use of this instrument is contemplated.

scholarly journals Clinical Applications of Office-Based Laryngeal Surgery With KTP Laser

2021 ◽  
Vol 32 (3) ◽  
pp. 118-123
Author(s):  
Jung-Hae Cho
Keyword(s):  
Laser Surgery ◽  
Laser Energy ◽  
Vocal Folds ◽  
Ktp Laser ◽  
Laryngeal Diseases ◽  
Advantages And Disadvantages ◽  
Laryngeal Surgery ◽  
Efficacious Treatment ◽  
Endoscopic Guidance ◽  
532 Nm

The pulsed photoangiolytic 532-nm potassium-titanyl-phosphate (KTP) laser has emerged in recent years as an efficacious treatment modality for vocal fold lesions. It also has broadened the indications for other laryngeal laser surgery. Features of KTP laser that it is a fiber-based delivery system and its energy is selectively absorbed by oxyhemoglobin make it suitable for office-based laryngeal procedures. An office-based KTP laser surgery provides an alternative management option for benign laryngeal diseases and can be performed comfortably under flexible endoscopic guidance which is placed through the nose of a fully awake patient. Office-based laryngeal surgery with a KTP laser can alleviate the need for general anesthesia. However, there are some limitations to apply due to reduced visual precision and the fact that the vocal folds are moving during procedures. Clinicians should carefully weigh the advantages and disadvantages of office-based procedures before a treatment option is selected. Patient selection and standardized laser energy parameters may help in decreasing complications and improving the treatment results.

A High Resolution Scanning Microscope

1968 ◽  
Vol 26 ◽  
pp. 356-357
Author(s):  
A. V. Crewe ◽  
J. Wall ◽  
L. M. Welter
Keyword(s):  
High Resolution ◽  
Field Emission ◽  
Spherical Aberration ◽  
Focal Length ◽  
Spot Size ◽  
Emission Source ◽  
Field Of View ◽  
Scanning Microscope ◽  
Magnetic Lens ◽  
High Quality

A scanning microscope using a field emission source has been described elsewhere. This microscope has now been improved by replacing the single magnetic lens with a high quality lens of the type described by Ruska. This lens has a focal length of 1 mm and a spherical aberration coefficient of 0.5 mm. The final spot size, and therefore the microscope resolution, is limited by the aberration of this lens to about 6 Å.The lens has been constructed very carefully, maintaining a tolerance of + 1 μ on all critical surfaces. The gun is prealigned on the lens to form a compact unit. The only mechanical adjustments are those which control the specimen and the tip positions. The microscope can be used in two modes. With the lens off and the gun focused on the specimen, the resolution is 250 Å over an undistorted field of view of 2 mm. With the lens on,the resolution is 20 Å or better over a field of view of 40 microns. The magnification can be accurately varied by attenuating the raster current.

scholarly journals Treatment of Bartholin gland cyst with CO2laser

2016 ◽  
Vol 14 (1) ◽  
pp. 25-29 ◽  
Author(s):  
Neila Maria de Góis Speck ◽  
Karol Pereira Ruela Boechat ◽  
Georgia Mouzinho Lima dos Santos ◽  
Julisa Chamorro Lascasas Ribalta
Keyword(s):  
Laser Beam ◽  
Co2 Laser ◽  
Laser Surgery ◽  
Skin Incision ◽  
Co2 Laser Surgery ◽  
Results Of Treatment

ABSTRACT Objective To describe the results of treatment with CO2 laser for Bartholin gland cysts. Methods Thirty-one women with Bartholin gland cysts were treated with CO2laser at an outpatient´s setting. Skin incision was performed with focused laser beam, the capsule was opened to drain mucoid content, followed by internal vaporization of impaired capsule. Results There were no complications. Five patients had recurrence of the cyst and were submitted to a second and successful session. Conclusion CO2 laser surgery was effective to treat Bartholin gland cysts with minimal or no complications, and can be performed at an outpatient´s setting.

Atlas of CO2 Laser Surgical Techniques

1989 ◽  
Vol 84 (3) ◽  
pp. 538
Author(s):  
Raymond J. Lanzafame ◽  
J. Raymond Hinshaw ◽  
Harold L. Rosenfeld
Keyword(s):  
Co2 Laser ◽  
Surgical Techniques

scholarly journals The application of C2 transpedicular screw, C1 laminar hook fixation and bone graft in the atlantoaxial instability

2021 ◽  
Vol 38 (2) ◽  
pp. 94-98
Author(s):  
Şükrü ORAL
Keyword(s):  
Motor Vehicle ◽  
Motor Vehicle Accident ◽  
Surgical Techniques ◽  
Atlantoaxial Instability ◽  
Posterior Arch ◽  
X Rays ◽  
Advantages And Disadvantages ◽  
Transpedicular Screw ◽  
Flexion Extension ◽  
Laminar Hooks

Traumatic atlantoaxial instability usually results from a motor vehicle accident, falls and motorcycle accidents. Atlantoaxial instability can lead to spinal cord compression and neck pain, but, spasticity and radicular symptoms as well. The purpose of surgery is to remove the compression and stabilize the joint permanently. To date, several surgical techniques have been described to remedy C1-C2 instability. In this study, the clinical and radiological outcomes of patients who operated with the C1 (Atlas bone) laminar hooks fixation and bilateral C2 (Axis bone) trans-pedicular screw technique were shown. Also, the advantages and disadvantages of this technique are discussed. From March 2010 to December 2017, 12 patients who have atlantoaxial instability were surgically treated by modified fixation technique which consists C1 laminar hooks fixation and bilateral C2 transpedicular screw. Twelve patients were operated with this procedure from March 2010 to December 2017. All the patients were checked with flexion-extension x-rays at the end of the twelfth week. The posterior bony fusion formation was observed on imaging in all patients. C2 bilateral pedicle screw combined with C1 laminar hook system is a good method for atlantoaxial instability in the conditions which is not convenient for insertion of C1 lateral mass and C2 trans-articular screw. However, this method may not be available in some cases such as traumatic, infection, neoplastic or degenerative pathologies in which the posterior arch of the atlas is damaged.

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