The major focus of the 2020 summer edition was the systematic review of the following schedules: WD (Disorders of Systemic, Metabolic or Environmental Origin, etc.) and WO (Surgery).  In addition to the systematic reviews of the WD and WO schedules, other minor additions and changes were made.

Summary Statistics for the 2020 Summer Edition

• 132 class numbers added
• 8 schedule range headers added
• 171 class number captions or notes modified
• 119 schedule range headers modified
• 74 class numbers canceled
• 9 schedule range headers deleted
• 49 index main headings added
• 763 index entries modified
• 50 index headings deleted

Systematic Reviews for the 2020 Summer Edition

Highlights from the WD (Disorders of Systemic, Metabolic or Environmental Origin, etc.)

A partial review of the WD schedule was already conducted with the 2019 summer edition systematic review to consolidate certain subjects in the QW and other schedules.  The review of the rest of the WD schedule was completed with the 2020 summer edition.   As a result, the following changes were made:

• The WD Schedule Header was changed from Disorders of Systemic, Metabolic or Environmental Origin, etc. to Medicine in Selected Environments
• WD 100-175 Nutrition Disorders cancelled:
  • New section created in QU schedule for Nutrition Disorders: QU 242-252
  • Malnutrition (QU 244) and Obesity (QU 248)  given Table G breakdown
  • General Deficiency Diseases moved from WD 105 to QU 246
  • Moved vitamin deficiencies from WD 110-155. Now classed with the actual vitamins
  • Separated out Vitamins from Nutrition Header in the QU schedule and made it an independent section QU 167-181
  • Moved Celiac Disease and Sprue from WD 175 to new number WI 471 indented under new number WI 470 Malabsorption syndromes (formerly WD 200.5.M2)
• WD 200-205 Metabolic Diseases cancelled. New section created in QU schedule for Metabolic Diseases: QU 260 A-Z; QU 265 A-Z for Inborn Errors of Metabolism
• WD 220-226 Water-Electrolyte Imbalance cancelled. New section created for Water-Electrolyte Imbalance. Acid-Base Imbalance. Two separate class numbers created for the two imbalances: QU 270 and QU 274. Works on regular balance are classified in QU 105
• WD 300-380 Connective Tissue Diseases cancelled. (Note: Several numbers in the WD 300-330 (Immune System Related Diseases) area had already been cancelled with 2019 summer edition). Connective Tissue Diseases  and Collagen Diseases moved to new  section: QZ 192-196
• WD 600-670 Disorders and Injuries of Environmental Origin cancelled.
  • WD 600 Persian Gulf Syndrome moved to new number QZ 146 Syndromes
  • WD 602 Electric Injuries and WD 670 Cold Injuries  moved to WO schedule
  • Several revisions made to QT 162 area
    • Many disorders moved from WD to QT  162 with Environmental factors acting on human physiology, e.g., Motion Sickness classed with Motion
    • 4 new QT 162 A-Z numbers created; 1 number cancelled; 2 numbers modified
  • WD 650 Submarine medicine moved to new number under Naval Medicine section
• WB 107 Wilderness Medicine cancelled. New section header and one number created: WD 680 
• WD 700-745 Header broadened: changed from Aviation Medicine to Aerospace Medicine. Other changes in this section:
  • 8 new form numbers created in this area based on literary warrant
  • 6 existing captions or notes modified
  • 1 number cancelled: WD 745: Aviation dentistry
• WD 750-760 Header changed from Space Medicine to Space Flight
• WD 800 Naval Medicine Section enhanced:
  • 27 new form numbers created based on literary warrant
  • New numbers created for Submarine Medicine (WD 850-860) in Naval Medicine Section
  • New number created for Collective Biography of Naval Personnel WZ 112.5.N2
• WB 116 Military Medicine cancelled. New section created for Military Medicine at WD 900
  • 35 new form numbers created
  • Naval medicine schools are classed in WD 919 with Military medicine

Highlights from the WO (Surgery)

• The WO Schedule Header was changed from Surgery to Wounds and Injuries
• 14 New WO numbers created
  • WO 320 Nerve block
  • WO 502 Surgical hemostasis
  • WO 504 Electrosurgery
  • WO 508 Ablation techniques
  • WO 595 Cosmetic techniques
  • WO 662 Tissue and organ procurement. Tissue donors
  • WO 664 Cell- and tissue-based therapy (works on stem cell transplantation classed in QU 325)  
  • WO 705 Cold injury
  • WO 720 Asphyxia
  • WO 730 Multiple trauma
  • WO 750 Emergency surgery
  • WO 780 War-related injuries (General)
  • WO 810 Stab wounds
  • WO 840 Electric injuries
• 8 WO numbers cancelled
  • [WO 140] Surgical diseases (General) (Classify general works on prognosis and treatment of surgical diseases in WO 500. Classify works on surgery for specific diseases with the disease)
  • [WO 198] Cautery. Laser and electrocoagulation (General) (Classify works on cautery in WO 508. Classify works on electrosurgery in WO 504. Classify works on laser coagulation in WO 511)
  • [WO 250] Methods of resuscitation (Classify general works on asphyxia in WO 720. Classify works on resuscitation in WB 106 [new number]. Classify works on respiration problems caused by anesthesia in WO 245)
  • [WO 290] Rectal (Classify works on rectal anesthesia in WO 275)
  • [WO 297] Muscle relaxants and tranquilizing agents in conjunction with anesthesia and analgesia (Classify works on muscle relaxants in QV 140. Classify works on tranquilizing agents in QV 77.9)
  • [WO 375] Diagnostic and therapeutic anesthetic procedures  (Classify works on nerve block in WO 320 [new number]. Classify works on anesthetics in QV 81).
  • [WO 515] Regenerative medicine (Classify works on regenerative medicine in QT 110) 
  • [WO 640] Prosthesis in plastic surgery (Classify works on surgically inserted prostheses and implants in WO 162)
• 38 WO class number or notes were modified

Other 2020 Summer Edition Changes

Examples of additional changes made:

Classification of Specific Types of Diet

An analysis of Diet Terms was done to explore the MeSH trees for Diet and Diet Therapy because not all the terms are in both trees.  Decision: All Diet Therapy terms should point to WB.  Terms that just tree under Diet can point to QT.

2 new numbers created:

• WB 415 Caloric restriction. Reducing diet 
• WB 423 Mediterranean diet

2 numbers modified

• WB 425: Fat control. Dietary fats: Note adjusted to change WD class number to new WB 415 number: Classify works on weight reduction diets in WB 415
• WB 431: Gluten-free diet added to caption

10 new index terms added:

• Diet, Carbohydrate Loading -- WB 427
• Diet, Gluten-Free WB 431
• Diet, Healthy -- QT 235
• Diet, High-Fat -- QT 235
• Diet, High-Protein Low-Carbohydrate -- WB 427
• Diet, Paleolithic -- WB 400
• Diet, Western -- QT 235
• Dietary Approaches To Stop Hypertension -- WG 340
• Portion Size -- QT 235
• Serving Size -- QU 145.3

Classification of Safety in Clinical Laboratories

QY 70 was expanded to include administrative aspects of clinical laboratories including standards.  A new number, QY 75 Laboratory Safety, was created specifically for safety in laboratories.  Several index terms were modified to add sub-indexes about safety and administrative aspects. New term added to index: Laboratory Proficiency Testing.

Classification of Renal Elimination

Caption at WJ 303 was changed from Urinary Secretion. Anuria (General)  to Diuresis. Renal elimination.   Renal Elimination  was added to index to point to WJ 303.

W1 vs WY for Reports of Societies

Reports of an administrative nature, regardless of how often they're issued, should be classed with the society. Edits were made to notes across all the schedules at form number 1.