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1.
Al-Azhar Medical Journal. 2005; 34 (2): 297-310
in English | IMEMR | ID: emr-69431

ABSTRACT

Although surgery remains as a gold standard line for management of hepatocellular carcinoma [HCC], many cases are not candidates for surgery due to underlying chronic liver disease and limited functional reserve even with recent advances in the field of surgery. At the same time several local ablative techniques have emerged and proved to be minimally invasive and effective measures for in situ control of HCC, of these techniques, radiofrequency ablation [RFA], and percutaneous ethanol injection [PEI]. The aim of the current study was to evaluate the safety and efficacy of RFA and ethanol injection for the treatment of HCC, to reach a protocol for proper management of unresectable HCC and, also to assess the quality of life before and after each technique. In the current study we had two groups of patients with HCC on top of cirrhosis due to hepatitis C virus [HCV] infection, one of them was subjected to RFA [G 1] and the other [G2] was subjected to PEI as therapeutic modalities for their HCC. As regards GI, it included 30 patients with 36 HCC lesions with a mean size of 3.02 cm which were treated by percutaneous US guided RFA using cooled-tip electrodes with a mean of 1-2 sessions of RFA. Studied patients were followed over variable periods that ranged between 6-18 months with a mean of 11.6 months. The responses to therapy were as follows: Complete ablation in 32 out of 36 lesions [88.8%], partial response in 3 out of 36 lesions [8.3%], recurrence in 3 [8.3%] lesions, and newly developed lesions in 7 cases. G2 included 20 patients with 26 HCC lesions with a mean size of 3cm for which we used PEI modality, we found that 21 out of 26 lesions [80.7%] had complete response, 4 out of 26[15.3%] had partial response and one [3.8%] showed local recurrence, and newly developed lesions were seen in 5 cases. The period of follow up ranged from 4-12 months with a mean of 10 months. As regards survival, one year survival rate was 75% in GI and 80% in G2. We concluded that, both RFA and PEI are safe and effective procedures and result in significant improvement in quality of life in patients with unresectable HCC. RFA showed higher rate of complete necrosis and requires fewer sessions than PET in the management of HCC


Subject(s)
Humans , Male , Female , Liver Cirrhosis , Liver Function Tests , Prospective Studies , Catheter Ablation/adverse effects , Acetaldehyde/administration & dosage , Injections, Intralesional/adverse effects , Treatment Outcome , Tomography, X-Ray Computed , Follow-Up Studies , Recurrence , Survival Rate , Liver Neoplasms
2.
Rev. chil. cardiol ; 8(3): 155-62, jul.-sept. 1989. tab, ilus
Article in Spanish | LILACS | ID: lil-84549

ABSTRACT

Anteriormente demostramos que la administración endovenosa de acetaldehido (AcH) y etanol, provoca en la rata una triple respuesta refleja caracterizada por bradicardia, hipotensión y apnea, cuya vía eferente es vagal. La activación central del vago, como un mecanismo de iniciación de esta respuesta refleja se descartó mediante la inyección intracarotídea (hacia el SNC) de (AcH), la que produce hipertensión sin bradicardia. La administración de AcH en el ventrículo izquierdo no produce reflejo, y sin embargo su administración en ventrículo derecho produce una respuesta refleja mayor y con una latencia significativamente menor que por vía endovenosa. Esto sugiere la estimulación de receptores sensitivos ubicados en la circulación pulmonar. De éstos, sólo la estimulación de los receptores J pulmonares puede producir una respuesta refleja con bradicardia, hipotensión y apnea, y dada su ubicación entre el alvéolo y capilar pulmonar, son accesibles por la circulación pulmonar y por vía respiratoria. Con el objeto de precisar la participación de estos receptores en la respuesta refleja se administró AcH mediante nebulización a ratas anestesiadas y traqueotomizadas. El AcH administrado por vía respiratoria produjo la misma respuesta refleja, caracterizada por bradicardia (-52.8ñ21.73%). hipotensión (-36,9ñ12.10%) y apnea (4/7), pero con una latencia significativamente menor (p=0.0001) que por la vía endovenosa. La frecuencia respiratoria, volumen corriente y ventilación minuto no se modificaron significativamente. La vagotomía cervical bilateral bloqueó totalmente la bradicardia y la apnea, observándose una hipotensión de menor magnitud (p=0.0001) y con una latencia mayor (p=0.0001). La nebulización de solución Ringer Locke, a 10§C y a 37§C, produjo solamente hipotensión que no se modificó con vagotomía. Los resultados sugieren que la respuesta inducida por AcH, es mediada por un aumento reflejo en el tonovagal y que los neurorreceptores involucrados en la iniciación de este reflejo se ubican a nivel pulmonar y corresponderían a los receptores J pulmonares


Subject(s)
Rats , Animals , Male , Female , Pulmonary Stretch Receptors , Acetaldehyde/administration & dosage , Acetaldehyde/pharmacology , Pulmonary Circulation , Vagotomy
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