Back-row Magnus Bradbury will join Scotland's World Cup travelling party on Monday as "precautionary injury cover" for Jamie Ritchie.
Bradbury is drafted in after Ritchie suffered a facial injury in Friday's win over Georgia at Murrayfield.
Ritchie is to remain in Scotland for further assessment.
"Jamie should be fine to join us at the end of the week and take a part in the World Cup, so that's a real positive," said Gregor Townsend.
Bradbury came off the bench to replace Edinburgh team-mate Ritchie on Friday.
He was given a place among the substitutes in the 36-9 victory despite being one of eight men cut by head coach Gregor Townsend last Tuesday.
Bradbury, capped eight times, had missed the three prior warm-up Tests with a rib problem.
Lock Ben Toolis and full-back Blair Kinghorn suffered head knocks against Georgia while Blade Thomson and Jonny Gray experienced hamstring issues but the Scottish Rugby statement on Ritchie makes no mention of the quartet.
Speaking at Gregor's Border Golf Challenge to raise money for the My Name'5 Doddie Foundation, Scotland head coach Townsend told BBC Scotland: "On Friday we had six injuries, four had to go to hospital, and I wasn't in a good mood, I wasn't in a great place. Since then it's all come back with positive news."
Scotland open their World Cup campaign against Ireland on 22 September, with Japan, Samoa and Russia their other Pool A opponents.