Comparative study between great saphenous vein endovenous laser ablation (EVLA) and modified haemodynamic correction (CHIVA) as a treatment for varicose veins

Varicose veins (VV) could be a handicapping condition which may lead to limb swelling, pain and venous stasis ulcer. Prevalence of VV could present from 1% to 73% and from 2% to 56% at women and men respectively. CHIVA has been developed through the last two decades and is currently the second most common surgical procedure for the operative management of VV. Endovenous laser treatment of GSV was approved by FDA in 2002 and SSV was approved in 2003. EVLT allows delivery of Laser energy directly into the blood vessel lumen. EVLT with a 1470-nm diode Laser system is clinically safe, feasible and well-tolerated technique without scar and allows people to return to their normal daily activities rapidly. In a prospective comparative study between January 2018 and January 2020, 40 patients from those attended the outpatient departments complaining from VV were assessed according to the CEAP classification and ultrasonic duplex and arranged into group I (CHIVA) and group II (EVLA). Both CHIVA operation and EVLA were performed under local anesthesia. Cases were reviewed regularly at the outpatient clinic for 6 months for recurrence and complications. The recurrence occurred at 2/20 and 0/20 at CHIVA and EVLA respectively.&nbsp

Comparative Study Between Great Saphenous Vein Endovenous Laser Ablation (EVLA) and Modified Haemodynamic Correction (CHIVA) as A Treatment for Varicose Veins

Varicose veins (VV) could be a handicapping condition which may lead to limb swelling, pain and venous stasis ulcer. Prevalence of VV could present from 1% to 73% and from 2% to 56% at women and men respectively. CHIVA has been developed through the last two decades and is currently the second most common surgical procedure for the operative management of VV. Endovenous laser treatment of GSV was approved by FDA in 2002 and SSV was approved in 2003. EVLT allows delivery of Laser energy directly into the blood vessel lumen. EVLT with a 1470-nm diode Laser system is clinically safe, feasible and well-tolerated technique without scar and allows people to return to their normal daily activities rapidly. In a prospective comparative study between January 2018 and January 2020, 40 patients from those attended the outpatient departments complaining from VV were assessed according to the CEAP classification and ultrasonic duplex and arranged into group I (CHIVA) and group II (EVLA). Both CHIVA operation and EVLA were performed under local anesthesia. Cases were reviewed regularly at the outpatient clinic for 6 months for recurrence and complications. The recurrence occurred at 2/20 and 0/20 at CHIVA and EVLA respectively.&nbsp

Industrial demand adaptation to renewable resources

The usage of renewable energy sources as an alternative energy source is faced with a major challenge introduced by the intermittency nature of the source. We have two options i) adapt the demand to the source, or ii) adapt the source to the demand. If the process demand is flexible and can be adapted to the energy source, it will enjoy cheap energy. Alternatively, non-flexible processes will require extra costs to be paid to adapt the source to the process energy requirements. This paper presents a demand response model to adapt the demand of industrial processes to the available energy source. The model is solved analytically using mixed integer linear programming. Then, three metaheuristic search algorithms were used. The results of the solving algorithms are compared with each other using the Wilcoxons' rank-sum test. Then the model is tested for two examples of flexible and rigid processes showing the differences