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ihssan al-alem

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https://www.readbyqxmd.com/read/24972696/effect-of-nonparallel-placement-of-in-circle-bipolar-radiofrequency-ablation-probes-on-volume-of-tissue-ablated-with-heat-sink
#1
Krishna Pillai, Ihssan Al-Alem, Javed Akhter, Terence C Chua, Mena Shehata, David L Morris
OBJECTIVES: Percutaneous bipolar radiofrequency ablation (RFA) is a minimally invasive technique for treating liver tumors. It is not always possible to insert the bipolar probes parallel to each other on either side of tumor, since it restricts maneuverability away from vital structures or ablate certain tumor shape. Therefore, we investigated how nonparallel placement of probes affected ablation. METHODS: Bipolar RFA in parallel and in divergent positions were submerged in tissue model (800 mL egg white) at 37°C and ablated...
June 2015: Surgical Innovation
https://www.readbyqxmd.com/read/24132470/heat-sink-phenomenon-of-bipolar-and-monopolar-radiofrequency-ablation-observed-using-polypropylene-tubes-for-vessel-simulation
#2
Ihssan Al-Alem, Krishna Pillai, Javed Akhter, Terence C Chua, David L Morris
BACKGROUND: Radiofrequency ablation (RFA) is widely used for treating liver tumors; recurrence is common owing to proximity to blood vessels possibly due to the heat sink effect. We seek to investigate this phenomenon using unipolar and bipolar RFA on an egg white tumor tissue model and an animal liver model. MATERIALS AND METHODS: Temperature profiles during ablation (with and without vessel simulation) were studied, using both bipolar and unipolar RFA probes by 4 strategically placed temperature leads to monitor temperature profile during ablation...
June 2014: Surgical Innovation
https://www.readbyqxmd.com/read/21710327/radiofrequency-ablation-of-concomitant-and-recurrent-pulmonary-metastases-after-surgery-for-colorectal-liver-metastases
#3
Terence C Chua, Ihssan Al-Alem, Jing Zhao, Derek Glenn, Winston Liauw, David L Morris
BACKGROUND: To evaluate our experience of radiofrequency ablation (RFA) of pulmonary metastases in patients with resected colorectal liver metastases who had concomitant or recurrent pulmonary metastases. METHODS: Clinical and treatment variables of patients undergoing RFA were collected, and their association with survival was examined. Survival analysis was performed by the Kaplan-Meier method. RESULTS: RFA was performed as concomitant sequential treatment of extrahepatic pulmonary metastases after hepatectomy in 19 patients (30%) and as salvage treatment for pulmonary recurrences after hepatectomy in 45 patients (70%)...
January 2012: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/21491165/surgical-cytoreduction-and-survival-in-appendiceal-cancer-peritoneal-carcinomatosis-an-evaluation-of-46-consecutive-patients
#4
Terence C Chua, Ihssan Al-Alem, Akshat Saxena, Winston Liauw, David L Morris
BACKGROUND: Surgical cytoreduction and intraperitoneal chemotherapy is increasingly accepted as an effective treatment modality for mucinous appendiceal neoplasm. For the majority of patients with low-grade histology, outcomes have been encouraging. The survival of patients with neoplasms of malignant character is protracted and this study was designed to evaluate the effectiveness of this surgical strategy on outcomes. METHODS: Forty-six consecutive patients with mucinous and nonmucinous appendiceal cancer with peritoneal dissemination were studied...
June 2011: Annals of Surgical Oncology
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