|An inhalational anaesthetic is a chemical compound that can be delivered via inhalation which possesses general anaesthetic properties. Inhaled anesthetic agents include nitrous oxide and various halogenated agents: desflurane, halothane isoflurane and sevoflurane. Inhalant anesthesics are used to Control of alveolar tension during induction and recovery. The open access journals are peer reviewed scholarly journals of Hypertension: Open Access. The top open access journals are freely available on the public internet domain, allowing any end users to read, download, copy, distribute, prink, search or link to the full texts of the articles. These provide high quality, meticulously reviewed and rapid publication, to cater the insistent need of scientific community. These journals are indexed with all their citations noted. The top open access journals are indexed in SCOPUS, COPERNICUS, CAS, EBSCO and ISI.