ABSTRACT
Objective: To determinate if dental bleaching with KTP laser is a safe, effective and efficient technique. The use of KTP laser for dental bleaching was only investigated in combination with a high concentration of hydrogen peroxide (35 percent). The recommended protocol was: for the use of KTP laser at 3W power and an irradiation time of ten seconds, three to four cycles are needed. For a power of 1W and an irradiation time of thirty seconds the number of cycles is three with a maximum of four. Under these conditions KTP laser bleaching was considered not to alter surface morphology, to have no influence on enamel micro hardness, to maintain the pulp temperature within normal values, to obtain lighter tooth color which can be maintained for months (no long term studies were conducted). Because the bleaching effect was obtained in a short period of time and maintained for months, KTP laser bleaching was considered an effective and efficient technique. Conclusion: KTP-assisted dental bleaching is a safe, effective and efficient technique when combined with high concentration of hydrogen peroxide.
Objetivo: Determinar si el blanqueamiento dental con láser KTP es una técnica segura, efectiva y eficiente. El uso de láser KTP para blanqueamiento dental fue solo investigado en combinación con una alta concentración de peróxido de hidrogeno (35 por ciento). El protocolo recomendado fue: para el uso de láser KTP a 3W de potencia y un tiempo de irradiación de diez segundos, tres a cuatro repeticiones son necesarias. Para una potencia de 1W y un tiempo de irradiación de treinta segundos, el número de repeticiones son tres con un máximo de cuatro veces. Bajo estas condiciones, el blanqueamiento dental con esta técnica no altera la morfología de la superficie dental, no tiene influencia en la microdureza del esmalte, mantiene la temperatura pulpar dentro de valores normales y logra un color más claro el cual puede ser mantenido por meses (no se han realizado estudios a largo plazo). Conclusión: Debido a que, el efecto blanqueador se obtiene en poco tiempo y se mantiene por meses, el blanqueamiento dental con láser KTP se considera una técnica eficiente y efectiva, además de segura. Esto cuando es combinada con peróxido de hidrogeno de concentración alta.
Subject(s)
Humans , Tooth Bleaching/methods , Tooth Discoloration/therapy , Hydrogen Peroxide , Lasers, Solid-StateABSTRACT
Aim: The aim of this study is to describe an unusual case of an Epidermoid Cyst (EC) of the tongue treated by a Potassium Titanium Phosphate (KTP) laser. Presentation of Case: A 38 young male patient came to our attention since a little painless swelling, yellowish, on the lateral left side of the tongue. After an accurate clinical examination, a surgical excision with a KTP laser was performed. Control at 7 and 21 days showed a complete healing of lesion and the histological diagnosis was EC. Discussion: EC generally appear like a firm, usually painless swelling that sometimes raises the tongue. In the differential diagnosis of the EC the clinician has to consider a wide range of pathologic conditions that could be classified as development, neoplastic and infective pathologies. Surgical enucleation is the only effective treatment for these kinds of lesions and prognosis is very good, with a very low incidence of relapse. Conclusion: Several techniques are reported in the literature but the use of KTP laser for the excisional biopsy of ORAL EC is very effective, since the relative ease and speed of execution, the compliance of patience, the absence of bleeding and suture.
ABSTRACT
Angiokeratomas are cutaneous vascular lesions that are characterized by dilated thin-walled blood vessels that lay in the upper part of the dermis, and this condition is mostly associated with epidermal reactions such as acanthosis, hyperkeratosis and elongation of rete ridges. Four variants have been described (angiokeratoma of Fordyce, angiokeratoma of Mibelli, angiokeratoma corporis diffusum, and solitary or multiple angiokeratomas). Among these variants, angiokeratoma of Fordyce develops mainly in elderly Caucasian men and it is common on the genitalia. Angiokeratomas are blue to purple, smooth, 2- to 5-mm papules on the scrotum, penile shaft or glans. They generally appear to multiply during life, but they occasionally present as single lesions. They may bleed after trauma and they may be mistaken for a nevus, melanoma or Kaposi sarcoma. Electrocautery or laser ablation can be offered for treatment. Various studies have recently reported successful treatment with argon laser, copper vapor laser, variable pulse width 532 nm neodymium:yttrium-aluminium-garnet (Nd:YAG) laser, 532 nm KTP (potassium-titanyl-phosphate) laser and flashlamp-pumped pulsed dye laser (PDL). We report here on a case of angiokeratoma that was treated with a 532nm KTP laser.
Subject(s)
Aged , Humans , Male , Angiokeratoma , Argon , Blood Vessels , Dermis , Electrocoagulation , Fabry Disease , Genitalia , Laser Therapy , Lasers, Dye , Lasers, Gas , Lasers, Solid-State , Melanoma , Nevus , Sarcoma, Kaposi , ScrotumABSTRACT
PURPOSE: Potassium-titanyl-phosphate laser photoselective vaporization of the prostate (PVP) is a safe and effective treatment for patients with symptomatic benign prostatic hyperplasia (BPH). The aim of this study was to assess the influence and the effect of PVP in BPH patients with detrusor underactivity. MATERIALS AND METHODS: We evaluated 21 patients with detrusor under-activity treated with PVP for BPH from January 2006 to December 2007. Detrusor underactivity was defined as detrusor pressure at maximal flow rate (Qmax) of less than 30 cmH2O and Qmax of less than 15 ml/s. Urodynamic studies were performed and international prostate symptom score (IPSS) and quality of life (QoL) scores were assessed preoperatively and at 6 months postoperatively. RESULTS: There were significant improvements in Qmax, voiding urine volume, post-void residual urine volume, IPSS, and QoL scores at 6 months after PVP treatment. However, patients did not show significant changes in maximal bladder capacity, bladder compliance, or detrusor pressure at Qmax. CONCLUSIONS: Even though BPH patients had detrusor underactivity, PVP was an effective surgical procedure. However, PVP did not make any significant difference on detrusor pressure at Qmax in 6 months.
Subject(s)
Humans , Compliance , Lasers, Solid-State , Prostate , Prostatic Hyperplasia , Quality of Life , Urinary Bladder , Urodynamics , VolatilizationABSTRACT
PURPOSE: We compared the effectiveness of transurethral resection of the prostate(TURP) with the effectiveness of high power potassium-titanyl-phosphate(KTP) laser vaporization combined with TURP in patients with a prostate volume over 45cc. MATERIALS AND METHODS: Between March 2004 and March 2007, we analyzed all the patients with a prostate volume over 45cc and who underwent TURP or KTP laser vaporization combined with TURP for treating symptomatic benign prostatic hyperplasia(BPH). The patients were divided into two groups(Group I: TURP: n=53, Group II: KTP laser vaporization combined with TURP: n=54). The initial evaluation included a digital rectal examination, urinalysis, determining the hemoglobin, electrolyte and prostate-specific antigen(PSA) levels, the International Prostate Symptom Score(IPSS), the quality of life(QoL), the maximum urine flow rate (Qmax), the postvoiding residual urine(PVR), transrectal ultrasonography (TRUS) and urodynamic study. The postoperative hemoglobin and electrolyte levels were checked promptly, and the total operation time, the foley indwelling period and the number of hospital days were recorded afterwards. The IPSS, QoL, Qmax, and PVR were evaluated at 1 and 3 months postoperatively. RESULTS: The baseline characteristics and postoperative outcomes of the two groups were similar. The total blood loss during operation was significantly lower in Group II(p=0.02). CONCLUSIONS: KTP laser vaporization combined with TURP resulted in less blood loss than TURP and it provided a good operation field in those patients who have over 45cc of prostate. Thus, KTP laser vaporization combined with TURP is safer than performing only TURP.
ABSTRACT
El objetivo de este trabajo prospectivo es determinar la eficacia del método KTP-láser de 80 watt para la vaporización y ablación de la HPB sintomática. También se analizan los resultados al combinar el KTP-láser con la RTU-P y su repercusión sobre la hemoglobina. Material y Método: 300 pacientes con HPB sintomática fueron tratados entre agosto del 2004 y noviembre del 2006 con el KTPláser o combinado con RTU-P. La resección adicional fue efectuada en pacientes con adenomas grandes o por lóbulo medio acentuado. El efecto ablativo fue controlado al final de la operación por medio de TRUS. Resultados: 300 pacientes fueron tratados en 2 grupos. El grupo 1 (n: 50) con sólo tratamiento láser y pequeños adenomas, la hemoglobina se redujo un 3,2 por ciento y nadie requirió una transfusión. El grupo 2 (n: 250) con tratamiento combinado de KTP-láser y RTU-P en adenomas grandes, la hemoglobina se redujo en promedio 15,2 por ciento después de la intervención; 2 pacientes (0,8 por ciento) necesitaron una transfusión. Conclusión: El estudio pone de manifiesto, las ventajas de combinar ambos procedimientos quirúrgicos para obtener un mejor resultado en la ablación del adenoma sobre todo en próstatas de gran tamaño.
The objective of this prospective study is to determine the effectiveness of the 80 watt KTP laser method for the vaporization and ablation of the symptomatic BPH. Also the results when combining the KTP-laser with the TUR-P and their repercussion on the haemoglobin are analysed. Material and Method: 300 patients with symptomatic BPH were treated between august 2004and november 2006 with the KTP-Laser or combined with TUR-P. The additional Resection was carried out in those patients with great adenomas or to have accentuated middle lobule. The ablative effect was controlledat the end of the operation with TRUS (transrectal ultrasound). Results: 300 patients were treated in 2 groups. The group 1 (n: 50) just by laser treatment and small adenomas, the haemoglobin was reduced a 3.2 percent and nobody required a transfusion. Group 2 (n: 250) with combined treatment of KTP-laser and TURP in great adenomas, the haemoglobin was reduced in average 15,2 percent after the intervention; 2 patients (0,8 percent) needed a transfusion. Conclusion: Our study puts of open, the advantages to combine both surgical procedures to mainly obtain a better result in the ablation of the prostate adenoma in prostates of great size.
Subject(s)
Humans , Male , Middle Aged , Aged, 80 and over , Prostatic Hyperplasia/surgery , Prostatic Neoplasms/surgery , Transurethral Resection of Prostate , Laser Therapy/instrumentation , Postoperative Complications , Prospective Studies , Time Factors , Rheology , Combined Modality TherapyABSTRACT
To explore the application of potassium titanyl phosphate (KTP) laser delivered via bronchofiberscope in the treatment of endobronchial tuberculosis. 36 patients with a diagnosis of endobronchial tuberculosis, with age ranging from 15 to 40 y were treated with KTP laser between Dec. 2002 and July 2004 (designated as treatment group). The other 36 patients diagnosed as having endobronchial tuberculosis (aged 18 to 42 y, with a mean age of 33. 5 y) without having received KTP laser treatment were included in a control group. Our results showed that the effective rates, in terms of recovery of bronchial lumen and cleanup of caseous necrotic mass were significantly higher in the treatment group 8 weeks after the treatment (P＜0.01), and the healing rates of atelectasis and obstructive infection were also significantly higher in the treatment group (P＜0.05 and P＜0.01), but the incidence of complication after 8 weeks was no significant difference (P ＞0.05). No significant changes were found in SaO2 and HR before, during and after the operation in the treatment group (P＞0.05). It is concluded that KTP laser is an effective therapy for endobronchial tuberculosis.
ABSTRACT
PURPOSE: PVP using a high-power potassium-titanly-phosphate(KTP) laser offers safe and efficacious surgical therapy for men with symptomatic BPH. To demonstrate its efficacy, safety and durability, we present the results of PVP for treatment of BPH with 12 month follow-up. MATERIALS AND METHODS: 104 consecutive men with symptomatic BPH underwent PVP with an 80 W KTP laser (Laserscope) between July 2003 and August 2004. All underwent preoperative and postoperative evaluation, including assessments of international prostate symptom score(IPSS), quality of life(QOL), peak urinary flow rate(Qmax), post-void residual volume(PVR), prostate specific antigen(PSA), and ultrasound prostate volume(PV). Secondary outcome parameters included surgical time, anesthesia, and length of catheterization. Follow-up assessment occurred at 1, 3, 6, and 12 months. Data were analyzed using the Wilcoxon signed rank test. RESULTS: Preoperative mean PV was 57.2+/-4.2 ml. PV decreased to 38.9, 35.4, 32.8 and 35.8 at 1, 3, 6 and 12 months (p <0.01 versus preoperative value). Mean improvements in IPSS, QOL, Qmax, and PVR at 12 months were 67%, 81%, 138% and 94%, respectively(p <0.001). Mean operative time was 26.3+/-15.0 minutes. Anesthesia included pudendal and prostatic block(n=102) and spinal anesthesia(n=2). Ninety-nine(95%) patients were treated as outpatients( <12 hrs) and the remaining 5 patients were admitted for 1 or 2 hospital days. Mean catheterization times were 9.8+/-3.1 hours(range 0~72), with 28(27%) patients not requiring a catheter post-operatively. Minor complications included mild hematuria lasting 3 weeks(3.8%), transient post-operative retention(2.9%), urge incontinence(1.9%), transient dysuria(25%), frequency(21.2%), urgency(17.3%) and retrograde ejaculation(41%). CONCLUSIONS: These results demonstrate that PVP is safe and efficacious for the treatment of symptomatic BPH. Long follow-up will further validate this new modality as the standard for surgical treatment of BPH.