Complex sentence: In the late 1800's it was hard to treat stab wounds because of a lack of transportation and an ability to effectively repair organs was not present, however; the use of laparotomys which has been developed a few years earlier had provided better patient outcomes.
Split into simpler sentences: In the late 1800's it was hard to treat stab wounds because of a lack of transportation and an ability to effectively repair organs was not present. However, the use of laparotomys which has been developed a few years earlier had provided better patient outcomes.