Can an inj reach 1000?

Could you please elaborate on the feasibility of an injury reaching a severity level of 1000? Is such a rating system commonly used in medical assessments, and if so, what criteria are typically considered to determine such a high score? Also, what types of injuries are likely to reach this level, and how does the medical community typically respond to such severe cases? Additionally, are there any known cases where an injury has actually reached or exceeded this threshold? Thank you for clarifying this matter.