Medacta Corporate

AMIS - A MEDACTA SOLUTION

True Minimally Invasive Surgery is characterized by the preservation of muscles and tendons encountered
during surgery to the hip joint capsule in addition to a reduced skin incision.

AMIS does not cut muscles
and does respect nerves



The anterior approach is one of the only techniques which follows inter-muscular and internervous planes to reduce the risk of injury to muscles, tendons, vessels and nerves.[13]
For this reason, AMIS is the ideal minimally invasive surgical approach as it is fundamental to a faster recovery.
AMIS is intended to improve the quality of your life and hasten your recovery after a Total Hip Replacement.
Your doctor will assist in providing more details.[14]

Why an AMIS Total Hip Replacement?

AMIS can potentially provide you with the following benefits

DECREASED POST-OPERATIVE PAIN [1,3]
The AMIS approach can reduce post-operative pain as muscles are not cut.

SHORTER REHABILITATION [3,4]
Post operative rehabilitation can start on the day of your operation, subject to your doctor’s approval.

SHORTER HOSPITAL STAY [2,12]
The AMIS technique can often reduce the time you are required to stay in hospital. Your surgeon may still
recommend an extended hospital stay however as this is dependent on your post-operative condition.

SMALLER SKIN SCAR [3]
With AMIS, the skin incision is often shorter and therefore scar tissue is reduced.

FASTER RETURN TO DAILY ACTIVITIES [2,10,11]
The AMIS technique allows you to return to daily activities in a shorter time frame. You may drive when
able to get in and out of the car comfortably, have excellent control of your legs and are no longer taking
pain medications.

LESS BLOOD LOSS [3,12]
The preservation of muscles and vessels during surgery usually reduces your blood loss. Transfusions are
rare and blood clots in the legs (deep venous thrombosis) are therefore less likely.

REDUCED RISK OF DISLOCATION [4,5]
(separation of the hip ball and socket)
The risk of dislocation is reduced because the AMIS technique accesses the hip from the front of your
body, allowing the muscles to be preserved. This helps maintain hip stability which can possibly reduce
the risk of dislocation.

REDUCED RISK OF LIMPING [6,7,8,9]
AMIS is characterised by a surgical technique that protects the various muscles, blood vessels and nerves encountered
during exposure of the hip joint. Minimising muscle and nerve damage potentially reduces the incidence of limping.

GOAL OF AMIS
The primary goal of an AMIS Total Hip Replacement is to minimize harm to muscles,
blood vessels and nerves surrounding the joint. 

 

REFERENCES

[1] Arthroplastie totale de hanche par voie antérieure et son évolution mini-invasive; F. Laude et al.; EMC; 2004, 44-667-B
[2] Single-incision anterior approach for total hip arthroplasty on an orthopaedic table; JM Matta et al; Clin Orthop Relat Res, 2005 Dec, (441): 115-24
[3] Minimally Invasive total hip arthroplasty: anterior approach; F. Rachbauer; Orthopäde, 2006 Jul;35(7):723-4, 726-9
[4] Mini-incision anterior approach does not increase dislocation rate: a study of 1037 total hip Replacement; T Siguier et al; Clin Orthop Relat Res, 2004 Sep, (426): 164-73
[5] What‘s new in hip arthroplasty; MH Huo et al; JBJS Am; 2005 Sep, 87(9):2133-46
[6] Rapid Rehabilitation and recovery with minimally invasive total hip arthroplasty; RA Berger et al; Clin Orthop Relat Res, 2004, (429): 239-247
[7] The minimally invasive anterior approach to hip arthroplasty; RE Kennon et al; Orthopäde, 2006 Jul, 35 (7): 731-7
[8] Dislocation after hip hemiarthroplasty: anterior versus posterior capsular approach.; JB Bush et al; Orthopedics. 2007 Feb;30(2):138-44
[9] Muscular damage after total hip arthroplasty: conventional versus minimally invasive anterior approach.; Dr Dora, Dr Kalberer; AOA 2008, Australia, Hobart
[10] Abductor Tendons and Muscles Assessed at MR Imaging after Total Hip Arthroplasty in Asymptomatic and Symptomatic Patients. C. Pfirmann et al., Radiology 2005, 235: 969-976.
[11] MR imaging of the abductor tendons and muscles after total hip replacement in asymptomatic and symptomatic patients. PD Dr. Dora, EFORT 2007
[12] Der anteriore Zugang für die minimal-invasive HTEP. C Dora; Leading Opinions Sept 2006, 1/2006
[13] Single-Incision Direct Anterior Approach for Total Hip Arthroplasty Using a Standard Operating Table; TP Lowell; The Journal of Arthroplasty Vol. 23 No. 7 Suppl. 1 2008
[14] The minimally invasive anterior approach to hip arthroplasty; RE Kennon et al; Orthopäde, 2006 Jul, 35 (7): 731-7