Rectal Suppository Anesthesia for Ophthalmic Surgery
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Solution Overview
Problem
Current methods for local anesthesia, particularly in surgeries like ophthalmic procedures, face limitations in effectively managing pain, anxiety, and peri-operative stress, with existing alternatives offering only minimal to moderate improvement.
Innovation Solution
Pharmaceutical compositions combining benzodiazepine, NMDA antagonist, and optionally β-blocker or antiemetic compounds, formulated for rectal, nasal, oral spray, transdermal, or transmucosal administration, providing a therapeutically effective blend for conscious sedation and anesthesia.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If intravenous route is used to administer anesthetic medications, then effective anesthesia is achieved, but patient comfort and ease of administration deteriorate
Solution Approach 1:
The patent introduces rectal suppositories as an intermediary administration route between intravenous and oral routes. The suppository form factor enables effective drug delivery through rectal mucosa absorption, providing a non-invasive alternative that maintains anesthesia effectiveness while eliminating the need for intravenous access and monitoring equipment
Solution Approach 2:
The patent replaces the mechanical intravenous administration system (requiring needles, catheters, pumps, and monitoring equipment) with a simple suppository insertion method. This substitution eliminates complex medical equipment while maintaining therapeutic effectiveness through the rectal route's efficient drug absorption characteristics
2Ease of operation
If oral administration of benzodiazepines and opioid analgesics is used, then patient comfort improves, but anesthesia effectiveness deteriorates to only minimal to moderate improvement
Solution Approach 1:
The patent changes the administration parameter from oral to rectal route, which fundamentally alters drug absorption kinetics. The rectal mucosa provides superior absorption characteristics compared to oral administration, enabling complete bioavailability of benzodiazepines and opioid analgesics while maintaining patient comfort and avoiding first-pass metabolism issues
Solution Approach 2:
The patent employs composite suppository formulations containing multiple active ingredients (benzodiazepines, opioid analgesics, and adjuvant medications) in a single rectal dosage form. This composite approach enables synergistic therapeutic effects, achieving complete anesthesia effectiveness while maintaining ease of administration through a single non-invasive insertion
3Object-affected harmful factors
If local anesthesia is used during intraocular operations, then complications are reduced, but management of pain and anxiety deteriorates
Solution Approach 1:
The patent merges multiple therapeutic functions into a single rectal suppository formulation: local anesthetic effect, systemic analgesia, anxiolysis, and antiemetic protection. This combination approach simultaneously reduces surgical complications through effective local anesthesia while comprehensively managing pain and anxiety through systemic drug delivery via the rectal route
Solution Approach 2:
The patent implements preliminary administration of combined anesthetic and analgesic medications via rectal suppository before intraocular surgery. This pre-treatment approach ensures adequate pain and anxiety control is established before surgical stimulation begins, while the local anesthetic component prevents intraoperative complications, achieving both objectives simultaneously
Data Source
AI summary
Pharmaceutical compositions and methods for inducing conscious sedation using such compositions are described, the compositions comprising a benzodiazepine-based compound, a NMDA antagonist, and optionally a β-blocker, antiemetic, an NSAID, and/or an antihistamine medication. Methods for fabricating the compositions and using them for anesthesiological applications are also described.