CamScanner Functions and Features Quiz

Hand and Foot

• Swelling mobility is restricted by tendon stretching or contraction.
• Treatment for simple ganglion is not usually indicated unless the patient insists.
• Aspiration or rupturing the cyst can lead to temporary disappearance, followed by recurrence; 20-50% recurrence rate with aspiration and sclerosant injection.
• Complete wall excision, under general anesthesia with a tourniquet, is the definitive treatment.
• Glomus tumour is rare; commonly found beneath a nail.
• The tumour is extremely painful and tender, and has a red or bluish colour.
• It needs differentiation from subungual haematoma, exostosis, and melanoma.
• Treatment involves complete excision under magnification.
• Implantation dermoid cyst forms when bits of skin are embedded within subdermal tissues.
• Sebaceous material from the skin forms the cyst; commonly found in the distal phalanx.

Surgery of Nerves

• Nerve trunks are composed of nerve fibres bundled together by connective tissue.
• The whole nerve trunk is enclosed by epineurium.
• Each bundle of nerve fibres is surrounded by perineurium.
• The connective tissue surrounding individual nerve fibers is called endoneurium.
• Nerve fibers may be motor, sensory, vasomotor, or sudomotor.
• Unlike the central nervous system, injured peripheral nerves may recover to varying extents.

Nerve Injuries (General Considerations)

• Open injuries : nerve division or laceration in open wounds or in crushes/burns.
• Closed injuries, caused by
• Contusion (direct force)
• Compression against bone by splints/plaster/crutches
• Traction (tearing of nerve roots)
• Fractures/dislocations
• Ischemia (damage/occlusion of main artery)
• Injection of irritant substances; nerve injuries are classified into 3 types:
• Neurapraxia: functional conduction paralysis but nerve is anatomically intact (no organic rupture)
  • Caused by mild traction or compression injuries
  • Nerve fibers remain intact within their sheaths
  • Symptoms: complete motor paralysis in distribution of the affected nerve (patchy loss/no sensory disturbance).
  • Recovery: spontaneous over days/weeks
• Axonotmesis: partial/complete rupture of nerve fibers (axons) but intact nerve sheath
  • Caused by contusion or traction injuries, complicating fractures/dislocations
  • Axons degenerate (Wallerian degeneration) distally to the injury site.
  • Recovery: delayed, fastest in muscle groups closest to the injury; varies based on lesion level (muscle recovery is slower than initial delay)
• Neurotmesis: partial/complete anatomical division of a nerve
  • Nerve undergoes degeneration similar to axonotmesis but a neuroma (mass of fibrous tissue and regenerating axons) fills the damaged area.
  • Complete division results in a terminal neuroma.
  • Recovery is poorest in mixed nerves and motor nerves for several small muscles; highest quality recovery in purely motor nerves supplying fewer large muscles, and lowest quality in mixed nerves involved in fine movement (e.g., ulnar/median nerves).

Test your knowledge about CamScanner, the popular scanning application. This quiz covers its primary functions, features, limitations of the free version, and potential issues users might encounter. Ideal for anyone looking to deepen their understanding of mobile scanning technology.