Angpagtistis opag-opera ay isang pinagdalubhasaan samedisina na gumagamit operatibong manwal at pamamaraang pang-instrumento sa mga pasyente upang siyasatin o gamutin ang isang pampatolohiyang kondisyon tulad ngsakit o pinsala, upang tulungang mapabuti ang paggana o itsura ng katawan, o upang isaayos ang mga hindi kanais-nais na nasirang bahagi. Ang pagsasagawa ng pagtistis ay maaring tawaging "pamamaraang kirurhiko", operasyon, o pag-oopera. Sinasagawa ang pagtitistis ng isangsurihano.
Ang mga surihano at nagsusulong sa publikong kalusugan, tulad ni Kelly McQueen, ay nilalarawan ang pagtistsi bilang "Kinakailangan sa karapatan sakalusugan.".[1] Sumasalamin ito sa pagkatatag ngWHOGlobal Initiative for Emergency and Essential Surgical Care noong 2005,[2] sa pagbuo noong 2013 ngLancet Commission for Global Surgery,[3] sa limbag noong 2015 ngBangkong Pandaigdig na Bolyum 1 na pinamagatangDisease Control Priorities. Essential Surgery,[4] at sa pagpasa ng 68.15 na bahagdan noong 2015 saWorld Health Assembly ngResolution for Strengthening Emergency and Essential Surgical Care andAnesthesia as a Component of Universal Health Coverage.[5]
↑McQueen KA, Ozgediz D, Riviello R, Hsia RY, Jayaraman S, Sullivan SR, et al. Essential surgery: Integral to the right to health. Health and human rights. 2010 Jun 15;12(1):137-52. PubMedPubMed. Epub 2010/10/12. (sa Ingles)
↑World Health Organization. Global Initiative for Emergency and Essential Surgical Care 2017 [binanggit 2017 Oktubre ika-23]. Makukuha sa:"WHO | WHO Global Initiative for Emergency and Essential Surgical Care" (sa wikang Ingles). Inarkibo mula saorihinal noong 25 Marso 2012. Nakuha noong9 Pebrero 2012.{{cite web}}:Unknown parameter|deadurl= ignored (|url-status= suggested) (tulong)
↑Meara JG, Leather AJ, Hagander L, Alkire BC, Alonso N, Ameh EA, et al. Global Surgery 2030: evidence and solutions for achieving health, welfare, and economic development. International journal of obstetric anesthesia. 2015 Abril;25:75-8. PubMedPubMed. Epub 2015/11/26. (sa Ingles)
↑Debas HT, Donker P, Gawande A, Jamison DT, Kruk ME, Mock CN, editors. Essential Surgery. Disease Control Priorities. 3rd ed. Washington, DC: International Bank for Reconstruction and Development / World Bank Group; 2015 (sa Ingles)
↑Price R, Makasa E, Hollands M. World Health Assembly Resolution WHA68.15: "Strengthening Emergency and Essential Surgical Care and Anesthesia as a Component of Universal Health Coverage"-Addressing the Public Health Gaps Arising from Lack of Safe, Affordable and Accessible Surgical and Anesthetic Services. World J Surg. 2015 Sep;39(9):2115–25. PubMedPubMed. Epub 2015/08/05. (sa Ingles)
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