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Trendelenburg position

From Wikipedia, the free encyclopedia
Not to be confused with Trendelenburg's sign.
Medical mannequin placed in the Trendelenburg position
subject is lying on their back with legs higher than their body
Trendelenburg position

In the Trendelenburg position, the body is lain supine, or flat on the back on a 15–30 degree incline with the feet elevated above the head.[1] The reverse Trendelenburg position, similarly, places the body supine on an incline but with the head now being elevated.

The Trendelenburg position is used in surgery, especially of the abdomen and genitourinary system. It allows better access to the pelvic organs as gravity pulls the intra-abdominal organs away from the pelvis. Evidence does not support its use in hypovolaemic shock, with concerns for negative effects on the lungs and brain.[2]

The position was named for the German surgeon Friedrich Trendelenburg (1844–1924).[3]

Current uses

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subject is lying on their back with legs lower than their body
Reverse Trendelenburg
  • The Trendelenburg position can be used to treat a venous air embolism by placing the right ventricular outflow tract inferior to the right ventricular cavity, causing the air to migrate superiorly into a position within the right ventricle from which air is less likely to embolise.[4]

Most recently, the reverse Trendelenburg position has been used in minimally invasive glaucoma surgery, also known as MIGS. This position is commonly used for a superior sitting surgeon that uses a combination of downward patient tilt, of approximately 30 to 35 degrees, microscope tilt towards themselves at the same angle and an intraoperative goniolens or prisms that allows them to visualise the inferior trabecular meshwork. Some joysticking of the globe may be required with an appropriate goniolens to bring the meshwork into view.[citation needed]

  • The Trendelenburg position along with the Valsalva maneuver, termed as modified-Valsalva maneuver, can also be used for the cardioversion of supraventricular tachycardia.[5]
  • The Trendelenburg position is helpful in surgical reduction of an abdominal hernia.[6]
  • The Trendelenburg position is also used when placing a central venous catheter in the internal jugular or subclavian vein. The Trendelenburg position uses gravity to assist in the filling and distension of the upper central veins, as well as the external jugular vein. It plays no role in the placement of a femoral central venous catheter.[7]
  • The Trendelenburg position can also be used in respiratory patients to create better perfusion.[8]
  • The Trendelenburg position has occasionally been used to produce symptomatic relief from septum posticum cysts of the subarachnoid space in the spinal cord, but does not bring about any long-term benefits.[9]
  • The Trendelenburg position may be used for drainage images during endoscopic retrograde cholangiopancreatography.[10]
  • The Trendelenburg position is reasonable in those with a cord prolapse who are unable to achieve a knee-to-chest position.[11] It is a temporary measure until a cesarean section can be performed.[11]
  • If a patient in a Fowler's position or semi-Fowlers position has sunk too far down into the bed, they may temporarily be put in a Trendelenburg position while staff reposition them. This does not have a direct therapeutic action but rather provides a mechanical advantage[12]

Controversial uses

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subject is lying on their back with legs raised and knees over another person's shoulders
A historic depiction of the Trendelenburg position
  • People with hypotension (low blood pressure) have historically been placed in the Trendelenburg position in hopes of increasing blood flow to the brain. A 2005 review found the "Literature on the position was scarce, lacked strength, and seemed to be guided by 'expert opinion.'"[13] A 2008 meta-analysis found adverse consequences to the use of the Trendelenburg position and recommended it be avoided.[14] However, the passive leg raising test is a useful clinical guide to fluid resuscitation and can be used for effective autotransfusion.[15] The Trendelenburg position used to be the standard first aid position for shock.[16]
  • The Trendelenburg position can also be used in the treatment of scuba divers with decompression sickness or arterial gas embolism.[17] Many experienced divers still believe this position is appropriate, but current scuba first aid professionals no longer advocate elevating the feet higher than the head. The Trendelenburg position in this case increases regurgitation and airway problems, causes the brain to swell, increases breathing difficulty, and has not been proven to be of any value.[18] "Supine is fine" is a good, general rule for victims of submersion injuries unless they have fluid in the airway or are breathing, in which case they should be positioned in the recovery position.[19]

See also

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References

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  1. ^ Ostrow, CL (May 1997). "Use of the Trendelenburg position by critical care nurses: Trendelenburg survey". American Journal of Critical Care. 6 (3): 172–6. doi:10.4037/ajcc1997.6.3.172. PMID 9131195.
  2. ^ Johnson, S; Henderson, SO (2004). "Myth: the Trendelenburg position improves circulation in cases of shock" (PDF). Canadian Journal of Emergency Medicine. 6 (1): 48–9. doi:10.1017/s1481803500008915. PMID 17433146.
  3. ^ Enersen, Ole Daniel. "Trendelenburg's position". Whonamedit.com. Retrieved 2009-03-04.
  4. ^ Orebaugh SL (1992). "Venous air embolism: clinical and experimental considerations". Crit Care Med. 20 (8): 1169–77. doi:10.1097/00003246-199208000-00017. PMID 1643897. S2CID 24233684.
  5. ^ Appelboam, A; Reuben, A; Mann, C; Gagg, J; Ewings, P; Barton, A; Lobban, T; Dayer, M; Vickery, J; Benger, J (2015). "Postural modification to the standard Valsalva manoeuvre for emergency treatment of supraventricular tachycardias (REVERT): a randomised controlled trial". Lancet. 386 (10005): 1747–53. doi:10.1016/S0140-6736(15)61485-4. hdl:11287/593988. PMID 26314489.
  6. ^ Buchwald H (1998). "Three helpful techniques for facilitating abdominal procedures, in particular for surgery in the obese". American Journal of Surgery. 175 (1): 63–4. doi:10.1016/S0002-9610(97)00233-X. PMID 9445243.
  7. ^ Central Venous Access Imaging at eMedicine
  8. ^ Powers SK, Stewart MK, Landry G (1988). "Ventilatory and gas exchange dynamics in response to head-down tilt with and without venous occlusion". Aviation, Space, and Environmental Medicine. 59 (3): 239–45. PMID 3355478.
  9. ^ Teng P, Rudner N (1960). "Multiple arachnoid diverticula". Archives of Neurology. 2 (3): 348–56. doi:10.1001/archneur.1960.03840090112015. PMID 13837415.
  10. ^ Leung, Joseph. "Fundamentals of ERCP". In Cotton, Peter B. (ed.). ERCP. GastroHep. doi:10.1002/(ISSN)1478-1239. S2CID 246400819.
  11. ^ a b Lore, Marybeth (March 2017). "Umbilical Cord Prolapse and Other Cord Emergencies". The Global Library of Women's Medicine. doi:10.3843/GLOWM.10136.
  12. ^ Latimer, Sharon; Chaboyer, Wendy; Gillespie, Brigid M. (July 2015). "The repositioning of hospitalized patients with reduced mobility: a prospective study". Nursing Open. 2 (2): 85–93. doi:10.1002/nop2.20. ISSN 2054-1058. PMC 5047314.
  13. ^ Bridges N, Jarquin-Valdivia AA (2005). "Use of the Trendelenburg position as the resuscitation position: to T or not to T?". American Journal of Critical Care. 14 (5): 364–8. doi:10.4037/ajcc2005.14.5.364. PMID 16120887.
  14. ^ Kettaneh, Nicolas (October 30, 2008). "Use of the Trendelenburg Position to Improve Hemodynamics During Hypovolemic Shock". BestBets.
  15. ^ Terai C, Anada H, Matsushima S, Kawakami M, Okada Y (1996). "Effects of Trendelenburg versus passive leg raising: autotransfusion in humans". Intensive Care Medicine. 22 (6): 613–4. doi:10.1007/BF01708113. PMID 8814487. S2CID 37299997.
  16. ^ Johnson S, Henderson SO (2004). "Myth: the Trendelenburg position improves circulation in cases of shock". CJEM. 6 (1): 48–9. doi:10.1017/S1481803500008915. PMID 17433146.
  17. ^ Stonier, JC (1985). "A study in prechamber treatment of cerebral air embolism patients by a first provider at Santa Catalina Island". Undersea Biomedical Research. 12 (1 supplement). Undersea and Hyperbaric Medical Society. Archived from the original on June 12, 2009. Retrieved 2009-03-19.
  18. ^ Dysbarism at eMedicine
  19. ^ Szpilman, David; Handley, Anthony (2014). Drowning. Springer, Berlin, Heidelberg. pp. 629–633. doi:10.1007/978-3-642-04253-9_97. ISBN 9783642042522.
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